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CAT Mock Test- 2 (October 20) - CAT MCQ


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30 Questions MCQ Test - CAT Mock Test- 2 (October 20)

CAT Mock Test- 2 (October 20) for CAT 2024 is part of CAT preparation. The CAT Mock Test- 2 (October 20) questions and answers have been prepared according to the CAT exam syllabus.The CAT Mock Test- 2 (October 20) MCQs are made for CAT 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for CAT Mock Test- 2 (October 20) below.
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CAT Mock Test- 2 (October 20) - Question 1

Which of the following statements is Leader least likely to agree with?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 1

{The act of mourning is not to recover from loss, Leader argues, but rather to find a way to accommodate and live with it.} Option A can be inferred from this.

In the last paragraph, the author mentions the following-

{When people put off the business of mourning, the pain of loss and separation finds a way to reassert itself. Leader describes the phenomenon of “anniversary symptoms”, the findings that adult hospitalisation dates coincide remarkably with anniversaries of childhood losses, or that GP surgery records reveal that people often return to doctors in the same week or month as their previous visit. “Rather than access their memories, the body commemorates them,” Leader writes}

When the business of mourning is put off, the pain of loss and separation finds a way to resurface. And anniversary symptoms are examples of this. Leader would agree with option B.

{The pandemic might be accelerating this process, as people are left to mourn alone in lockdown and to pay their final respects over Zoom. And yet, Darian Leader contends that we cannot properly mourn in isolation; mourning is a social task. “A loss, after all, always requires some kind of recognition, some sense that it has been witnessed and made real,” Leader writes.} In the third paragraph,  Leader asserts, "The act of mourning is not to recover from loss, Leader argues, but rather to find a way to accommodate and live with it." And we know, according to Leader, mourning helps in accommodating the loss and live with it. Hence, mourning in isolation, which is not proper mourning according to Leader, may not help a person find a way to accommodate the loss and live with it. Option C is also likely to receive Leader's approval.

This leaves us with option D, which is least likely to receive Leader's approval. In the penultimate paragraph, Leader argues that public displays of grief help facilitate individual mourning. So, he believes that individual mourning is possible. Hence, option D is the answer.

CAT Mock Test- 2 (October 20) - Question 2

Which of the following is a reason why the behaviourists are concerned about the evidence supporting the Darwin-friendly view?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 2

In the passage, the author presents two major concerns- One, the laboratory tests, though rigorous, may employ animals that may not behave as they do in the wild. And the other concern is that evidence from field observations may be anecdotal and not based on scientific research and hence could be unreliable. 

Comparing the options, option C captures the second concern mentioned by the author. 

Option A is extraneous to the discussion. The author makes no such observation.

Option B is a distortion. The laboratory tests do not necessarily suppress or inhibit the animal's true behaviour. Rather, the animals chosen for the experiment may behave in a way that may not mirror the behaviour of others belonging to the same species in the wild. 

Option D is a misrepresentation. The author mentions the rarity of large-scale, extensive field studies and not laboratory studies. 

Option C is the answer. 

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CAT Mock Test- 2 (October 20) - Question 3

All of the following statements can be inferred from the passage, EXCEPT;

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 3

“...selected entities must exist in populations showing heritable variation in fitness, greater fitness resulting in these entities’ differential reproduction...” From these lines, option A can be inferred.

"...Replication here means making fairly exact one-to-one copies, as genes (and asexual organisms such as bacteria) do. Reproduction, though, is a more inclusive and forgiving term - it’s what we humans and other sexual species do when we make offspring that resemble both parents, but each only imperfectly...” Option B can be inferred from these lines.

“...In recent decades, many theorists have come to understand that there can be reproducing or even replicating entities evolving by natural selection at several levels of the biological hierarchy - not just in the domains of replicating genes and bacteria, or even sexual creatures such as ourselves. They have come to embrace something called multilevel selection theory...” Here, the author discusses that many theorists have started comprehending natural selection differently, but it has not been mentioned that the new theory has completely replaced the traditional theory. Hence option C cannot be inferred.

“...Even if inherited properties are the result of undirected or ‘random’ mutation, repeating the selection process over generations will incrementally improve on them...” Option D can be inferred from these lines.

Option C is the answer. 

CAT Mock Test- 2 (October 20) - Question 4

Which of the following, if true, would strongly counter Peter Godfrey-Smith’s observations on natural selection?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 4

Peter Godrey- Smith’s main argument is that for a thing to be deemed as a ‘unit of selection’, it must exhibit parent-offspring relations, i.e., be able to reproduce. Option A bears no relevance to the unit of selection and can be safely eliminated.

Option B reiterates that natural selection cannot exist on its own and needs something to act on. It does not counter Peter Godrey-Smith’s argument in any way. 

Peter Godfrey-Smith opines that different entities, including social groups, in principle, could be deemed as undergoing a change through selection if they are treated as being part of a larger entity. However, he further goes on to elucidate how not being able to reproduce disqualifies certain entities from being treated as units of selection. Hence, option C, even if true, does not negate the philosopher’s central argument around reproduction.

Option D, if true, would imply that reproduction and, consequently, parent-offspring relations are not necessary conditions to be fulfilled by an entity for it to be classified as a unit of selection. This contrasts Godfrey-Smith’s major argument. Hence, option D is the answer.

CAT Mock Test- 2 (October 20) - Question 5

Which of the following is definitely true according to the multi-level selection theory?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 5

The multi-level theory posits that life could be represented as a hierarchy of entities nested together in larger entities. For these larger entities to survive the competition, these entities must perform better than other similarly large entities. However, considering cooperation as a performance or survival metric/parameter is speculative. Option A cannot be inferred.

{“the idea that life can be represented as a hierarchy of entities nested together in larger entities, like Russian dolls. As the philosopher of science, Peter Godfrey-Smith puts it, ‘genes, cells, social groups and species can all, in principle, enter into change of this kind"}. From these lines, it is clear that social groups can act as vehicles of selection. Hence, option B is the answer.

Cohesive functioning across different layers must outweigh individual competition within groups. This does not, however, mean there is no individual competition within groups. Hence option C is not the answer.

The former part of Option D is again a straightforward interpretation of the idea,” life could be represented as a hierarchy of entities nested together in larger entities”. However, the latter part, which asserts the competition levels are higher in larger entities, has not been implied. Hence, option D is not the answer.

CAT Mock Test- 2 (October 20) - Question 6

Which of the following statements about human behaviour cannot be inferred from the first paragraph?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 6

The author states the following in the opening paragraph-

{ Through superhero comic books, to the obscure immanence of modern art, from visions of paradisiacal vacations to computer games and the self-mythologising of social media production, we seek a higher ground beyond the banal and the profane.}  Art, media, books all of which are cultural tools, aid an individual who seeks to cross over to a higher ground, separated from the crudity and triteness of the usual reality. Option A can be inferred.

Option B is a distortion. {some seek inner spaces wherein faith and meaning can be transformed into experience.} The author does not assert that an individual tries to form a relationship between faith and meaning. Option B cannot be inferred.

{Lastly, individuals have developed their own ways to create self-narratives that include mythical transitions in pilgrimages or personal quests to their ancestral lands.} Option C can be inferred from this line. 

{We’ve even replaced the effervescent experience of sacred rites, not in blood sacrifice or vision quests, but in our engagement with art, drugs, cinema, rock music and all-night dance parties.} Option D can be inferred from this line.

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 7

DIRECTIONS for the question: The four sentences (labelled 1, 2, 3, 4) below, when properly sequenced, would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence as your answer:

  1. And, to say that someone is or is not intelligent has never been merely a comment on their mental faculties.
  2. But the notion that intelligence could determine one’s station in life was already much older.
  3. The idea that intelligence could be quantified, like blood pressure or shoe size, was barely a century old when I took the test that would decide my place in the world.
  4. It is always also a judgment on what they are permitted to do. 

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 7

Statement 3 appears to be the starting sentence since it introduces the subject: the quantification of intelligence. The author mentions that the attempt to measure intelligence "was barely a century old" at the time he took an unknown test. However, he adds that the very notion that intelligence could be used to determine one's place in the world in life precedes this aforementioned time stamp. Hence, arrangement 3 - 2 forms a logical block. The author further adds to the discussion by highlighting the outcome of such an enterprise (of determining intelligence): it is not just a "comment" on our mental capabilities but also a "judgement" on what we will be allowed to do. Thus, 1- 4 forms a coherent follow-up to 3 - 2. The use of the phrase "has never been merely" in Statement 1 and "always also" in Statment 4 helps us determine their positions. Hence, the correct sequence would be 3214.

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 8

DIRECTIONS for the question: The four sentences (labelled 1, 2, 3, 4) below, when properly sequenced, would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence as your answer:

  1. Now, tech giants like Facebook and Twitter are actively copying Clubhouse.
  2. Its growth is undeniable thanks to figures as disparate as Oprah Winfrey, Elon Musk and, Trump consigliere Roger Stone — not to mention regular people craving conversation after nearly a year of lockdown.
  3. Now, with more than two million users and the app on the precipice of the mainstream, Clubhouse has become a flashpoint in the broader culture wars around censorship, online harassment, and the far-reaching powers of Big Tech.
  4. They are doling out the new talking features for their billions of users, giving a preview of what the future of online life is likely to look like.

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 8

1 and 3 both can be the starting sentences, but on reading all four sentences, we find that these lines talk about an app called Clubhouse.

3 will start the para because it tells us what is Clubhouse all about, and 2 will follow it as it further elaborates on how it gained popularity. 4 will definitely follow 1 because 4 elaborates on how the tech giants are trying to copy Clubhouse. Finally, the pair 14 will follow 3-2.

Hence, the sequence will be 3214.

Alternate explanation:

On a preliminary read, we notice that all sentences incorporate transition words (like "now", "they", "its") at the beginning. These could serve as potential markers for us to zero in on the correct sequence quickly. The discussion revolves around Clubhouse, which is first introduced to us in Statement 3. The term "its" in 2 points towards the subject ("Its growth..." = "Clubhouse's growth..."); while we notice that Statement 4 begins with "they" (plural ) - thus, points towards multiple entities. It is evident that these entities are Facebook and Twitter mentioned in 1. Hence, 3214 is the correct sequence. 

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 9

DIRECTIONS for the question: Five sentences related to a topic are given below. Four of them can be put together to form a meaningful and coherent short paragraph. Identify the odd one out.

  1. The band consists of vocalist Anthony Kiedis, bassist Flea, drummer Chad Smith, and guitarist John Frusciante.
  2. Their music incorporates elements of alternative rock, funk, punk rock and psychedelic rock.
  3. Alternative rock is a category of rock music that emerged from the independent music underground of the 1970s and became widely popular in the 1990s.
  4. The Red Hot Chili Peppers are an American rock band formed in Los Angeles in 1983, and with over 80 million records sold worldwide, the Red Hot Chili Peppers are one of the best-selling bands of all time.
  5. They have won six Grammy Awards, and in 2012 were inducted into the Rock and Roll Hall of Fame.

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 9

Sentence 3 will be the odd one because it talks about alternative rock in general, but the rest of the sentences talk about the alternative rock band Red Hot Chili Pepper. The rest of the sentences, when arranged in sequence 4125, make a coherent paragraph.

4 will be the starting sentence since it introduces the topic, i.e. the band called Red Hot Chili Peppers. 1 will follow 4 because it introduces the band members. 2 will follow 1 because it talks about the kind of music the band makes. Finally, 2 will be followed by 5 as 5 highlights their awards and achievements.

CAT Mock Test- 2 (October 20) - Question 10

The literary world has often unjustly marginalized cyberpunk literature, confining it to a niche of readers. Critics argue that its fixation with dystopian futures and advanced technology detaches it from present realities and humanistic concerns. However, proponents of cyberpunk argue that it is reflective of contemporary societal anxieties regarding technological domination and identity crises, thus bearing significant relevance to current and future cultural paradigms. This debate continues as the genre gains gradual mainstream acceptance.

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 10

The passage discusses the criticisms of cyberpunk literature and the counter-argument emphasizing its relevance, reflecting modern anxieties about technology and identity. Option B encapsulates these aspects, mentioning both the criticism and the defense that highlights its societal relevance. Other options either focus singularly on the criticism or misrepresent the reasons for the genre's marginalization.

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 11

Direction: Choose the most logical order of sentences from among the given choices to construct a coherent paragraph.

1. There was no need to relate events together, as God, not human action, ordered events.
2. The chronicles of the Middle Ages were successive lists of events, which reflected a belief that the only causal agent in history is God.
3. The chroniclers recorded events based on tradition, and the evidence they used was predominantly oral testimony and eyewitness accounts. 
4. The chronicle form served this belief well, as the listings created a perception that these were separate occurrences controlled by nothing but divine providence.


Detailed Solution for CAT Mock Test- 2 (October 20) - Question 11

While arranging the parts of the paragraph, we should find some grammatical or contextual connections between them -

  • 2 is the first sentenceas it introduces the subject 'The chronicles of the Middle Ages' about which the remaining sentences are discussing. ' Chronicles ' are factual written accounts of important or historical events in the order of their occurrence.
  • 1 is the second sentence as it is describing the belief that is reflected in the successive lists of events. The belief was that events were decided in advance by God and were not the result of human actions.
  • 4 is the third sentence as the phrase 'this belief' refers to the belief discussed in sentence 1. It means that the belief was well supported by the chronicle form, as the record created the impression that the events were separate occurrences controlled solely by divine authority.
  • 3 is the last sentence as it is talking about how chroniclers recorded the events. ' Chronicler ' is a person who writes accounts of important or historical events.

Thus, the correct order is 2143:

  • 2: The chronicles of the Middle Ages were successive lists of events, which reflected a belief that the only causal agent in history is God. 
  • 1: There was no need to relate events together, as God, not human action, ordered events.
  • 4: The chronicle form served this belief well, as the listings created a perception that these were separate occurrences controlled by nothing but divine providence. 
  • 3: The chroniclers recorded events based on tradition, and the evidence they used was predominantly oral testimony and eyewitness accounts.
CAT Mock Test- 2 (October 20) - Question 12

What is the total number of people of all states that have persons with disability by status of treatment taken from different broad type of disability between 3000 and 6400?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 12

The states that have the persons with disability by status of treatment taken from different broad type of disability between 3000 and 6400:

So, option (c) is the correct answer.

CAT Mock Test- 2 (October 20) - Question 13

Who is from Pakistan?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 13

Let us draw a circular arrangement diagram with 8 spots, numbered from 1 to 8.
It is given that the minimum PCI and maximum PCI are USD 7500 and USD 18,000, respectively. Also, the PCI are in an arithmetic progression.
Hence, we can say that a = 7500, a + 7d = 18,000 or d = 1500
Therefore, the PCI of the eight nations are USD 7500, USD 9000, USD 10,500, USD 12,000, USD 13,500, USD 15,000 ,USD 16,500 and USD 18,000 in ascending order.

 

In statement 4, it is given that Sirisena, who is facing outside, is sitting third to the right of the delegate from New Zealand.
Let us assume that Sirisena is seated at the 1st spot, then we can say that the delegate from New Zealand is seated at either the 4th or the 6th spot.

Case 1: When the delegate from New Zealand is seated at the 4th spot
In this case, Malcolm can sit either at the 6th or the 7th spot. If Malcolm sits at the 6th spot, then Jacinda has to sit at the 4th position. It is given that Jacinda is not from New Zealand. Hence, we can say that Malcolm cannot sit at the 6th spot.
If Malcolm sits at the 7th position, then Jacinda will have to sit opposite to Sirisena, whereas it is given that Sirisena and Jacinda are not seated opposite to each other. Hence, we can say that Malcolm cannot sit at the 7th spot.
So, we can say that the delegate from New Zealand is not seated at the 4th spot.

Case 2: When the delegate from New Zealand is seated at the 6th spot

 

Irfan and Prayut belong to the nations whose PCI are USD 10,500 and USD 12,000. Neither Irfan nor Prayut is from New Zealand. Hence, we can say that New Zealand's PCI cannot be either USD 10,500 or USD 12,000.
In statement (6), it is given that Malcolm, who is facing outside, is an immediate neighbour of Irfan and Prayut.
Hence, we can say that Malcolm can be seated at any one out of 3rd, 4th and 6th spots.

If Malcolm is seated at the 3rd spot, then Jacinda should occupy the 1st spot, which is not vacant. Hence, we can say that Malcolm cannot occupy the 3rd spot.
If Malcolm is seated at the 6th spot, then Jacinda will occupy the 4th spot. But, in this case, Ashraf has to sit at any one out of the 8th, 2nd and 3rd seats. In this case, Ashraf has to be a neighbor of either Jacinda and Sirisena, which contradicts with the information given in statement 2. Hence, we can say that Malcolm cannot occupy the 6th spot as well.
Therefore, we can say that Malcolm occupies the 4th spot. Consequently, Jacinda sits at the 2nd spot. Also, Irfan and Prayut can occupy the 3rd and 4th spots in any order.

The delegates from Afghanistan and Australia are facing towards each other, and the delegate from Pakistan is sitting to the immediate left of the delegate from Afghanistan.
We can say that the delegates from Afghanistan and Australia are facing towards the centre. That is only possible when they are seated at the 3rd and 7th spots. Also, the delegate from Pakistan is sitting to the immediate left of the delegate from Afghanistan. This is possible only when the delegate from Afghanistan occupies the 7th spot. Consequently, the delegates from Pakistan and Australia will occupy the 8th and 3rd spots, respectively.

Yameen's country's PCI is equal to the sum of the PCI of his immediate neighbours. This is only possible when his neigbour's PCI are USD 7500 and 9000, in any order. Therefore, Yameen can occupy only the 8th spot.
It is given that Ashraf is facing towards the centre and is not an immediate neighbour of Jacinda and Sirisena. Therefore, we can say that Ashraf is from Afghanistan and occupies the 7th spot. Consequently, Widodo will occupy the 6th spot.
Also, it is given that Ashraf does not belong to the nation with the least PCI. Hence, we can say that Sirisena belongs to the nation with the PCI USD 7500. Consequently, we can say that Afghanistan's PCI is 9000 USD. The PCI of New Zealand and Indonesia are USD 13,500 and USD 15,000 in any order.

From the arrangement, we can see that Yameen is from Pakistan. Hence, option 3 is the correct answer.

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 14

What can be the highest number of sessions taken by Chanda in the month of July for the five sections combined?


Detailed Solution for CAT Mock Test- 2 (October 20) - Question 14

Through the given information, we get the following table:

For A1, we see that there is a period of 28 days from 4th July to 31st July. If there were x sessions taken by Chanda for section A1, then x must be a factor of 28. From (c), we can say that Chanda can take lecture for A1 every second, fourth or seventh day.
For A2, we see that there is a period of 33 days from 2nd July to 3rd August. If there were x sessions taken by Chanda for section A2, then x must be a factor of 33. From (c), we can say that Chanda can take lecture for A2 every third day.
For A3, we see that there is a period of 24 days from 6th July to 29th July. If there were x sessions taken by Chanda for section A3, then x must be a factor of 24. From (c), we can say that Chanda can take lecture for A3 every second, third, fourth or sixth day.
For A4, we see that there is a period of 30 days from 3rd July to 1st August. If there were x sessions taken by Chanda for section A4, then x must be a factor of 30. From (c), we can say that Chanda can take lecture for A4 every second, third day, fifth or sixth day.
For A5, we see that there is a period of 26 days from 5th July to 30th July. If there were x sessions taken by Chanda for section A5, then x must be a factor of 26. From (c), we can say that Chanda can take lecture for A5 every second day.

To get the highest number of sessions which Chanda can take, the frequency of the session must be highest. Thus, for sections A1, A2, A3, A4 and A5, the sessions must be taken every second, third, second, second and second day, respectively.
We get:
Number of sessions for A1 in July - It will start on 1st with a session on every second day = [(31 - 1)/2] + 1 = 16 sessions
Number of sessions for A2 - It will start on 1st July with a session on every 3rd day = [(31 - 1)/3] +1 = 11
Number of sessions for A3 - It will start on 1st with a session on every second day = [(31 - 1)/2] + 1 = 16 sessions
Number of sessions for A4 - It will start on 2nd with a session on every second day = [(30 - 2)/2] + 1 = 15 sessions
Number of sessions for A5 - It will start on 2nd with a session on every second day = [(30 - 2)/2] + 1 = 15 sessions
Total sessions = 73 sessions

CAT Mock Test- 2 (October 20) - Question 15

Directions: Study the following information carefully and answer the question given below.

Chanda, who is working in a leadership position with an MNC, also teaches as a visiting professor at an MBA institute. The institute has five different sections A1, A2, A3, A4 and A5 and Chanda taught there only in the period from 1st July to 4th August.

Further, the following information is also known.
(a) In the first five days from 1st to 5th July, Chanda taught students from sections A2, A4, A1, A5 and A3.
(b) Further, on 29th July, 30th July, 31st July, 1st August and 3rd August, Chanda taught students from sections A3, A5, A1, A4 and A2.
(c) The period between any two consecutive sessions taken by Chanda for a particular section was same and was not more than 6 days for any section.
(d) Also, for any section, sessions were not taken on consecutive days.
(e) Chanda could teach more than one section in a day.
Based on this information, when is Chanda's fourth lecture for section A4?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 15

Through the given information, we get the following table:

For A1, we see that there is a period of 28 days from 4th July to 31st July. If there were x sessions taken by Chanda for section A1, then x must be a factor of 28. From (c), we can say that Chanda can take lecture for A1 every second, fourth or seventh day.
For A2, we see that there is a period of 33 days from 2nd July to 3rd August. If there were x sessions taken by Chanda for section A2, then x must be a factor of 33. From (c), we can say that Chanda can take lecture for A2 every third day.
For A3, we see that there is a period of 24 days from 6th July to 29th July. If there were x sessions taken by Chanda for section A3, then x must be a factor of 24. From (c), we can say that Chanda can take lecture for A3 every second, third, fourth or sixth day.
For A4, we see that there is a period of 30 days from 3rd July to 1st August. If there were x sessions taken by Chanda for section A4, then x must be a factor of 30. From (c), we can say that Chanda can take lecture for A4 every second, third day, fifth or sixth day.
For A5, we see that there is a period of 26 days from 5th July to 30th July. If there were x sessions taken by Chanda for section A5, then x must be a factor of 26. From (c), we can say that Chanda can take lecture for A5 every second day.

Since Chanda takes a session for section A4 on 23rd July but not on 19th July, we can see that this can happen only when Chanda takes a lesson every third day for A4. In this case, the fourth lecture for A4 will be taken on 11th July.
Hence, option 2 is the right choice.

CAT Mock Test- 2 (October 20) - Question 16

Shyam bought fresh grapes which have 80% concentration of water. He stored them for few days such that the quantity of water drops down by 60% of the original quantity in the grapes. He then mixed these dried grapes with fresh grapes in the ratio of 5:8 by weight. What is the approximate percentage of water in the resulting mixture?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 16

Let we have 1 kg of fresh grapes. Then it will have 0.2kg pulp and 0.8 kg water.

After drying the quantity of water = (1−0.6)0.8 = 0.4(0.8) = 0.32 kg water.

Thus 0.52kg of dried grape will have 0.32kg of water

Let the quantity of dried grape mixed be 5 kg and quantity of fresh grape = 8 kg

Amount of water in 5 kg of dried grape = 

Amount of water in 8 kg fresh grape = 8 × 0.8 = 6.4

Total amount of water = 

% of water in the mixture = 

CAT Mock Test- 2 (October 20) - Question 17

If f(x2 - x) = x4 - 2x3 + 3x2 - 2x - 3, find the value of

f(f(6))/f(5)

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 17

f(x2-x) = x4 - 2x3 + 3x2 - 2x-3

f(x2 - x) = x4 - 2x3 + x2 + 2x- 2x - 3

f(x2 − x) = (x2−x)+ 2(x− x) −3

f(x) = x2 + 2x - 3 = (x+3)(x-1)

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 18

Find the number of integer values of x ( x<100) satisfying the following:


Detailed Solution for CAT Mock Test- 2 (October 20) - Question 18

For the expression to be defined, the denominator can't be equal to 0. So, x ≠ 2 
Similarly, x2 + 3x is always greater than 0, so can be ignored for the sign of the expression. 

Breakpoints are -7, -5, 1, 2

Hence, values are -7, -6, -5, ... , 1, 3, 4, 5, 6, .... , 99

Hence 8 + 98 = 106

CAT Mock Test- 2 (October 20) - Question 19

A large solid cube of steel of side 1 metre is molten and recast into a number of smaller cubes of side 5cm or 10cm. If it is known that the number of 5cm cubes was at least double the number of 10cm cubes, what is the minimum percentage increase in the total surface area in this process?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 19

We know that if we have to minimise the total surface area, we need to keep the number of 5cm cubes minimum.

Let the number of 10cm cubes be b and the number of 5 cm cubes be a

Therefore,

100 x 100 x 100 = a x 5 x 5 x 5 + b x 10 x 10 x 10

8000 = a + 8b

Now, a > = 2b, since a needs to be minimum, a = 2b

Therefore, 10b = 8000

b = 800

a = 1600

Initial surface area = 6 x 100 x 100 = 60000

Final surface area = 6 (800 x 10 x 10 + 1600 x 5 x 5) = 720000

Hence, percentage increase = 720000 - 60000/60000 x 100 = 1100%

CAT Mock Test- 2 (October 20) - Question 20

What is the ratio of the areas of a square and a regular hexagon with an equal perimeter?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 20

Let the perimeter be 24a 

Side of square = 6a

Side of hexagon = 4a

Area of square = 36α2
 
Area of hexagon = 

Ratio = 

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 21

The cost price of 10 shirts and 5 trousers together is Rs. 10,000, A shopkeeper sells shirts at a profit of 15% and trousers at a loss of 10% and his overall gain is Rs. 275. Find the cost price of a shirt.


Detailed Solution for CAT Mock Test- 2 (October 20) - Question 21

Given 

The cost price of 10 shirts and 5 trousers together = Rs. 10,000

A shopkeeper sells shirts at a profit of 15% and trousers at a loss of 10% and his overall gain = Rs. 275

Formula Used 

Profit% = (Profit/CP) × 100 

Loss% = (Loss/CP) × 100 

Calculation 

Let the cost price of shirt and trouser be x and y 

According to the question  

10x + 5y = 10000 ----(1)

And also according to the question 

10x (15/100) - 5y (10/100) = 275 

⇒ 15x - 5y = 2750 ---(2)

On adding (1) and (2), we get 

25x = 12750

⇒ x = 510

∴ The cost price of a shirt is Rs. 510.

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 22

What is the remainder when 4550 is divided by 13?


Detailed Solution for CAT Mock Test- 2 (October 20) - Question 22

From Fermat's theorm we know that if  p is prime number then ap−1 mod p = 1

Thus 4512 mod 13 = 1

(4550 mod 13 = ((4512))4 × 452) mod13

Which equals 452 mod 13

452 = 2025

2025 mod 13 = 10

CAT Mock Test- 2 (October 20) - Question 23

The total cost of 10 knives, 14 scissors and 15 blades is Rs. 799. The total cost of 20 knives, 25 scissors and 13 blades is Rs. 1110. What would be the total cost of 10 knives, 20 scissors and 49 blades?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 23

10k + 14s + 15b = 799 (x5)

20k + 25s + 13b = 1110 (x2)

50k + 70s + 75b = 3995

40k + 50s + 26b = 2220

Subtracting

10k + 20s + 49b = 1775.

CAT Mock Test- 2 (October 20) - Question 24

If the HCF of two natural numbers is 10 and their LCM is 1000, find the number of possible pair of numbers satisfying this criterion.

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 24

Let the numbers be 10a and 10b

Hence,

10a x 10b = 10 x 1000

ab = 100

Possible sets of values are

(1, 100), (2, 50), (4, 25), (5, 20), (10, 10)

(2,50) (5,20) (10,10) are not possible since they are not coprime.

Hence 2 sets of pairs.

CAT Mock Test- 2 (October 20) - Question 25

A toothpaste manufacturer sells toothpaste to a wholesaler at a price such that the manufacturer has a profit of 10%. The wholesaler sells the toothpaste to a retailer such that the profit earned is 20% of the cost price of manufacturing it. The retailer sells the toothpaste to customers at mentioned MRP and gets 20% profit from the sales. If the customer had to pay Rs 312 for one tube of toothpaste, what will be the profit earned by the wholesaler by selling 5 toothpaste tubes to the retailer?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 25

Let the cost of manufacturing 1 unit of toothpaste is x

Thus the selling price for the manufacturer is 1.1x

Profit for the wholesaler = 0.2x thus the selling price for wholesaler = 1.3x

The selling price for the retailer = 1.2 × 1.3x = 1.56x

We are given that 1.56x = 312 or x = 200

Profit for wholesaler = 0.2x = Rs 40 per tube

Profit for 5 tubes = Rs200

CAT Mock Test- 2 (October 20) - Question 26

How many terms are common in the two series:
2, 11, 20, 29, 38, ...., 9002
-1, 9, 19, 29, 39, ...., 10009

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 26

First common term = 29

Common difference = LCM(common difference of 1st series, common difference of 2nd series) = LCM(9, 10) = 90

So the common terms of the 2 series will be an AP with a = 29 and d = 90

Now, last term of the series < = 9002

29 + (n - 1) 90 <= 9002

(n - 1)90 <= 8973

n - 1 <= 99.7

n <= 100.7

n = 100

CAT Mock Test- 2 (October 20) - Question 27

Sonali bought eggs at Rs 90 a dozen. She kept few eggs to herself and sold the remaining eggs such that the profit she made was 33 1/3 ​% of the money she spent to buy all the eggs. At what markup % did she sell the remaining eggs if she kept 1/3​ of the eggs for herself?

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 27

Total money received after the sale = (1+ 33 1/3 ​%)90 = (4/3​) 90 = 120

Cost of 1 egg for Sonali = 90/12 ​= 7.5

Number of eggs kept by Sonali = 1/3 12 = 4

Eggs sold by Sonali = 12 - 4 = 8

Selling price per egg = 120​/8 = 15

Markup = 15 - 7.5 = Rs 7.5

Markup percent = 7.5/7.5​ × 100 % = 100%

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 28

An escalator is moving up. Rohit and his girlfriend walk up the moving escalator. Rohit has a walking speed one and half times that of his girlfriend. Rohit reaches the top after taking 40 steps, while his girlfriend does so after taking 30 steps. If the escalator is switched off, how many steps would Rohit take to walk up to the top?


Detailed Solution for CAT Mock Test- 2 (October 20) - Question 28

Let the walking speed of Rohit be 1.5x and that of his girlfriend be x. Let the speed of the escalator be S steps/unit time, and the number of steps on the escalator be N.
As per information provided for Rohit, we can say that N = (40/1.5x) * (1.5x+S)
As per information provided for Rohit's girlfriend, N = (30/x) * (x+S)
Equating the two we get S = 3x
Hence number of steps on the escalator is N = 120.

CAT Mock Test- 2 (October 20) - Question 29

Detailed Solution for CAT Mock Test- 2 (October 20) - Question 29

*Answer can only contain numeric values
CAT Mock Test- 2 (October 20) - Question 30

A work is done by three persons A, B and C. A alone takes 9 minutes to manufacture a single bolt, while B and C working together take 6 minutes to manufacture a single bolt. If the entire task requires manufacturing of 30 such bolts, and all three work together, then how many minutes does the trio need to work for?


Detailed Solution for CAT Mock Test- 2 (October 20) - Question 30

A alone takes 9 minutes to manufacture a single bolt, hence in 1 minute, 1/9th of a bolt is manufactured.
B and C working together take 6 minutes to manufacture a single bolt, hence in 1 minute, 1/6th of a bolt is manufactured.
If all three start working together, then in 1 minute, they can manufacture (1/9 + 1/6)th of a bolt or 5/18th of a bolt,
Hence 1 bolt takes the trio 18/5 or 3.6 minutes to manufacture.
Thus 30 bolts will take the trio 30*3.6 = 108 minutes to manufacture.

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