UPSC Indian Forest Service (IFoS) Prelims CSAT (GS2) Mock Test- 2 Free

The series follows the below given pattern:

3² + 3 = 12

4³ + 4 = 68

5² + 5 = 30

6³ + 6 = 222

7² + 7 = 56

∴ The value of ? is 56

Using Options:

The pattern is following in one option: m u k al / m u k a l / m u k a l

Therefore, ‘ulklua’ is the correct answer.

According to the passage:

• The first and the fourth options are given directly in the passage.
• The passage talks about many biological phenomena whose causes are yet to found.
• Therefore, the third option is perfectly true.
• The second option is true but does not sync with the main context of the passage.

Given:
Duration of the journey by bus = 3 hours 25 minutes
Duration of the journey by train = 4 hours 15 minutes
Duration of the journey by rickshaw = 40 minutes

First, add the three durations:
– Bus leg: 3 hours 25 minutes
– Train leg: 4 hours 15 minutes
– Rickshaw leg: 0 hours 40 minutes

Add hours separately and minutes separately:
• Hours: 3 + 4 + 0 = 7 hours
• Minutes: 25 + 15 + 40 = 80 minutes

Since 80 minutes = 1 hour 20 minutes, convert 80 minutes into hours and minutes:
80 minutes = 60 minutes + 20 minutes = 1 hour 20 minutes

So total time = 7 hours + (1 hour 20 minutes) = 8 hours 20 minutes

If the journey started at 6 a.m., then adding 8 hours 20 minutes gives:
6 a.m. + 8 hours = 2 p.m.
2 p.m. + 20 minutes = 2 : 20 p.m.

Answer: 2 : 20 p.m.

First, find each person’s one‐day work rate:
• A does 1/10 of the work in one day.
• B does 1/12 of the work in one day.
• C does 1/15 of the work in one day.

Add these rates to get the combined one‐day rate:
1/10 + 1/12 + 1/15
= (6/60) + (5/60) + (4/60) [using a common denominator of 60]
= (6 + 5 + 4) / 60
= 15/60
= 1/4 of the work per day.

That means together they complete one‐quarter of the work in a single day. Therefore, to finish the entire job (1 whole work), they need:
1 ÷ (1/4) = 4 days.

Answer: 4 days.

Given the total population of a village

are females

Therefore, female population

Male population

Given of males are uneducated.

Educated males

of females are uneducated it means of them are educated.

Therefore, educated females

Total educated persons

Required per cent

Let us call the sets of citizens playing cricket, badminton, and football “C,” “B,” and “F,” respectively.

We are told that no one plays both cricket and badminton. In other words, the overlap between “C” and “B” is empty—there are zero people who play cricket and badminton together.

Because someone who plays all three sports would have to play both cricket and badminton, and we know no single person plays cricket and badminton together, it follows that there cannot be anyone who plays all three.

Therefore, the number of citizens who play all three games is 0.

From the passage, it is clear that the correct answer is an option (B). Passage directly states that “Age, physical fitness, genetics, but not gender of a new entrant has a bearing on the blood oxygen level.”

Start at (0, 0).

1. Run north 4 km → (0, 4)

2. Turn left (to face west) and run 5 km → (–5, 4)

3. Turn left (to face south) and run 5 km → (–5, –1)

4. Turn left (to face east) and run 6 km → (1, –1)

5. Turn left (to face north) and run 1 km → (1, 0)

You end at (1, 0), while you started at (0, 0). To go from (1, 0) back to (0, 0) you must run west.

Owning some natural resources will not create liability to not waste resources, according to the passage. It will help to fix accountability as per the second line of the passage. Therefore, option (A) is incorrect, while option (B) is correct.

Option (C) in itself is a correct statement but it is not a corollary to the given passage, as the passage does not talk of sustainable development.

Option (D) too might be seen as a correct statement but option (B) is more logical. It is so because the given passage stresses the “tragedy of commons” as a result of nobody owning it.

25 + 27 = 52

23 + 30 = 53

33 + 21 = 54

Therefore, 

? + 36 = 55

? = 55 – 36

? = 19

Given:

Total monthly income = Rs. x

Money spent on food = 25%

Money left after expenditure = Rs. 5400

Total monthly income = Rs. x

Money spent on food = 25% of x

Money left = (100 - 25)% of x

⇒ Money left = 75% of x

Amount spent on movies = 10% of 75% of x

⇒ Amount left with the person = (100 - 10)% of 75% of x

⇒ Amount left with the person = 90% of 75% of x

⇒ Amount left with the person = × × x = x

Money left after expenditure = Rs. 5400

⇒ x = 5400

⇒ x = 5400 ×

⇒ x = Rs. 8000

∴ The total monthly income of the person is Rs. 8000.

Given:

Percentage of student's marks when he fails by 13 marks = 35%

Percentage of another student's marks when he gets 37 marks more = 60%

Let the maximum marks of exam be x.

Percentage of student's marks when he fails by 13 marks = 35%

⇒ Passing marks of student = 35% of x + 13 ----(1)

Percentage of another student's marks when he gets 37 marks more = 60%

⇒ Passing marks of another student = 60% of x - 37 ----(2)

Equating (1) and (2), we get

35% of x + 13 = 60% of x - 37

⇒ (60 - 35)% of x = (37 + 13)

⇒ 25% of x = 50

⇒ x = 50 ×

⇒ x = 200

∴ The maximum marks of exam is 200.

In option 2, circle with a cross and square are adjacent to each other which cannot be happened as they both are opposite to each other according to the question figure.

Completing the incomplete pattern:

A 9 × 9 × 9 cube has 9 cubes of 1 × 1 × 1 cubes along its length, breadth and width each. If we remove a layer of 1 × 1 × 1 cubes (the smaller cubes) then the new cube will have following dimensions :

length = 9 – 1 – 1 = 7; breadth = 9 – 1 – 1 = 7 and

height = 9 – 1 – 1 = 7

So the number of 1 × 1 × 1 cubes

= 7 × 7 × 7 = 343

The correct answer is, 'Do not see their own limitations'.

Key Points

• Let's consider the following statements from the passage.
  • This is a part of the way societies make sense of themselves, and hence actually make and reproduce themselves. All such orderings are partial and limited, but do not mean untrue. Partial knowledge is not false knowledge.

​From the highlighted statement it is clear that option 1 is the correct answer.

The correct mirror image of the given figure when the mirror is held at the right side is:

Hence, "option (1)" is the correct answer.

Calculation:

The number of Red cars sold by company P = 1212

The white cars sold by company S = 5600

Total = 5600 + 1212 

⇒ 6812

Again,

The number of white cars sold by company P = 4200

The black car sold by company Q = 1622

Total = 4200 + 1622

⇒ 5822

The number of cars extra sold = 6812 - 5822

⇒ 990

The number of Red cars sold by company P and the white cars sold by company S together is 990 more than the number of white cars sold by company P and the black car sold by company Q together.

Option 2 is the correct answer.

GIVEN INFORMATION:

• Anirudh was born on 12th March 1993.
• He is a marine engineer with 61% marks.
• He has also done an internship for a period of 14 months with a renowned shipping company. 
• He has been working as a supervisor in a company for the past 2 years.
• He has secured 80% marks in the common entrance test.​

​​DETAILED SOLUTION:

There are four requirements for selecting candidates.

A. Should be a marine engineering graduate with a minimum of 65% marks. 

⇒ Anirudh has NOT fulfilled this criteria as he has scored 61% marks whereas the requirement was 65%.

B. Should have done an internship of at least 1 year with some shipping company.

⇒ He has fulfilled this criteria.

C. Should not be less than 21 years of age and more than 29 years of age as on 1st July 2020.

⇒ He was born on 12th March 1993. So his age on 1st  July 2020 would be 27 years, 3 months, 3 weeks and 5 days. He has fulfilled this criteria.

D. Should have secured a minimum of 75% marks in the common entrance test.

⇒ He has fulfilled this criteria.

Therefore, he should be rejected as he has not fulfilled the criteria of being a marine engineer with a minimum 65% marks..

Solution:

Weight of Ross in class 9th = 72 kg

Weight of Rachel in class 9th = 48 kg

Weight of Monica in class 10th = 82 kg

Weight of Phoebe in class 10th = 58 kg

Sum of weight of Ross and Rachel in class 9th = 72 + 48 = 120 kg

Sum of weight of Monica and Phoebe in class 10th = 82 + 58 = 140 kg

Required Ratio = 120 : 140 = 6 : 7

Hence, the correct option is 1.

The correct answer is 1 and 2

Key Points

• Let's examine each of the given statements:
  •  Inter-linking of rivers should be undertaken: 
    • ​If we carefully read the passage, we find that in the last line, it is mentioned that "...waters in the country's many rivers flow unutilized..." 
    • Thus we can reasonably conclude that 'inter-linking of rivers' is one of the possible measures
  • A network of dams and canals should be built across the country for the proper distribution of water: 
    • ​In the first line of the passage, we find mention of "...highly skewed, seasonal, and spatial distribution of monsoon flows..."
    • Also, in the second line of the passage, we find that there is "need for holding rainwater in reservoirs, for subsequently releasing it for use over the year"
    • Additionally, in the last line of the passage, it is mentioned that "...waters in the country's many rivers flow unutilized and are discharged into the sea every year."
    • Since a network of dams and canals serve to alleviate the above problems, we can reasonably conclude that it is a possible measure
  • Farmers should be provided easy loans for digging borewells
    • ​The second line of the passage talks about decreasing "...freshwater availability." and not groundwater availability. 
    • The third line talks about the need for storing water in "reservoirs" and not underground storage
    • Nowhere in the passage have the terms 'farmers' or 'loans' or even 'agriculture' been mentioned
    • Thus, we can reasonably conclude that the above is not a correct option
  • Usage of water for agriculture should be regulated by law
    • As mentioned above, nowhere in the passage have the terms 'farmers' or 'loans' or even 'agriculture' been mentioned
    • Also, there is no mention of any kind of regulation by law
    • Additionally, there is no mention of the types of usage of water
    • Thus, we can reasonably conclude that the above is not a correct option
  • Distribution of river water among regions should be regulated by the Union Government
    • ​The passage mentions nothing about any kind of regulation needed by any Government
    • Also, there is no mention of 'distribution of river water among regions'
    • Thus we can reasonably conclude that this is not a correct option

Thus the correct answer is Option 1

Hint

• Statement 3 can be eliminated easily because not only is nothing mentioned about farmers using more borewells but also, digging borewell further adds to extensive water consumption whereas the passage talks about water conservation 
• Once Statement 3 is eliminated, Options 3 and 4 are automatically eliminated
• Among Options 1 and 2, we can easily observe that Statement 1 is correct as the last line of the passage talks about river water going unutilized

The correct answer is Man seeks control over external things affecting him.

Key-Points

• Let us examine the given statements.
• Statement 1 is irrelevant because there is no mention of men seeking control over external things in the passage.
• Statement 2 is a part of the argument in the passage because the idea of super and sub-human beings refers to the segregation of human beings and exclusion of some from governing rights based on their no ability.
• Statement 3 is relevant to the argument in the passage because according to the passage, exclusion of human beings is justified on the grounds of the good of the society and viability of the political process, that is, systemic efficacy.
• Statement 4 is relevant because according to the passage, governing rights are limited to a few select citizens and segregation of human beings is justified for the good of society as there are varieties in capabilities of individuals which determine who can govern and who can not.

Thus, the least essential argument is that man seeks control over external things affecting him.

The correct answer is Emerging economies are at a risk of shock from advanced economies.

Key Points

• In the passage, it has been stated that the foreign portfolio investments in developing economies are increasing.
• However, in case of change in the monetary policy of advanced economies, there are bound to be steep adverse effects on the developmental process and economic growth in emerging economies.
   

Therefore, the critical inference is that emerging economies are at risk of shock from advanced economies.

Additional Information

• Quantitative easing (QE) is a form of monetary policy used by central banks as a method of quickly increasing the domestic money supply and spurring economic activity.
• Quantitative easing usually involves a country's central bank purchasing longer-term government bonds, as well as other types of assets, such as mortgage-backed securities (MBS).
• Reversal of quantitative easing leads to the reduced money supply in the economy and lower investment: both domestically and abroad.
   

Hence, the right inference is that emerging economies are at risk of shock from advanced economies.

Given:

The speeds of three bikes are in the ratio 

Formula used:

Speed = 

Calculation:

Let the distance travelled by the bikes = 

And let the speeds of the three bikes be , $5x$ , and $7x$.

Time taken by the 1^st bike to cover the distance  $=\frac{d}{3x}$

Time taken by the 2^nd bike to cover the distance  $=\frac{d}{5x}$

Time taken by the 3^rd bike to cover the distance  $=\frac{d}{7x}$

Ratio of time taken by the three bikes to cover the same distance

⇒ 

Multiplying by LCM of 105

We get,

⇒ 

∴ The correct answer is the ratio of the bikes 

As per given question,

Seven cars C1, C2,C3, C4, C5, C6 and C7 have different prices.

• The price of only two cars is more than the price of C5.
• The price of only one car is less than the price of C7.

__ > __ > C5 > __ > __ > C7 > __ ---------(i)

• The price of C1 is more than the price of C4 and C5.

​C1 > C4, C5 ---------(ii)

• The price of C4 is more than the price of C2.
• The price of C3 is less than the price of C2.

 C4 > C2 > C3 ---------(iii)

• The price of C1 is not the highest.

On combining equation (i), (ii) and (iii) we get:

 C6 > C1 > C5 > C4 > C2 > C7 > C3

Now,

i. The price of C1 is more than the price of C6 → False

Il. The price of C7 is more than the price of C3 → True

Hence, the correct answer is "Only II".

Mirror images of the consonants when the mirror is placed vertically :

So, the number of images of these that do not look like their original shapes = 14.

Hence, the number of images that do not look like their original shapes is 14.