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CAT Practice Test: Month (April) - CAT MCQ


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30 Questions MCQ Test - CAT Practice Test: Month (April)

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CAT Practice Test: Month (April) - Question 1

The base of an equilateral triangle ABC lies on the y – axis. The co – ordinates of the point C is (0, – 3). If origin is the midpoint of BC, then the co – ordinates of B are

Detailed Solution for CAT Practice Test: Month (April) - Question 1

Explanation:

Let the coordinate of B be (0,a).
It is given that (0, 0) is the mid-point of BC.

Therefore 0 = (0 + 0) /2 , 0 =(a - 3) /2   a - 3 = 0 ,  a = 3

Therefore, the coordinates of B are (0, 3).

CAT Practice Test: Month (April) - Question 2

If the co – ordinates of a point are (3, – 7), then its ordinate is

Detailed Solution for CAT Practice Test: Month (April) - Question 2

Explanation:

Since y−coordinate of a point is called ordinate.its distance from the x-axis measured parralel to the  y - axisTherefore, ordinate is −7.

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CAT Practice Test: Month (April) - Question 3

The values of ‘y’ for which the distance between the points (2, – 3) and (10, y) is 10 units is

Detailed Solution for CAT Practice Test: Month (April) - Question 3

CAT Practice Test: Month (April) - Question 4

If A is point on the x – axis whose abscissa is 5 and B is the point (1, – 3), then the distance AB is

Detailed Solution for CAT Practice Test: Month (April) - Question 4

Explanation:

Since A is a point on the x - axis, therefore coordinates of A are (5 , 0)

CAT Practice Test: Month (April) - Question 5

The point where the perpendicular bisector of the line segment joining the points A(2, 5) and B(4, 7) cuts is:

Detailed Solution for CAT Practice Test: Month (April) - Question 5

Explanation:

Since, the point, where the perpendicular bisector of a line segment joining the points A(2 , 5) and B(4 , 7) cuts, is the mid-point of that line segment.

CAT Practice Test: Month (April) - Question 6

Ajesh saves Rs 50,000 every year and deposits the money in a bank at compound interest of 10%(compunded annually).What would be his total saving at the end of the 5th year?

Detailed Solution for CAT Practice Test: Month (April) - Question 6

 

At the end of the 1st year, he will get Rs 50000, it will give him interest for 4 years compounded annually
Hence at the end of 5 years, this amount will become 50000(1.1)4
Similarly, the amount deposited in the 2nd year will give interest for 3 years. Hence it will become 50000(1.1)3
Similarly, we can calculate for the remaining years.
The total saving at the end of the 5th year would be a GP, given by
Net saving = 50000(1.1)+  50000(1.1)3  ..... 50000
Thus net saving = =  Rs 3,05,255

CAT Practice Test: Month (April) - Question 7

Define the following functions:
(a) (a M b) = a – b (b) (a D b) = a + b
(c) (a H b) = (ab) (d) (a P b) = a/b

Q.

Which of the following functions will represent a2 – b2?

Detailed Solution for CAT Practice Test: Month (April) - Question 7

Option a = (a – b) (a + b) = a2 – b2

CAT Practice Test: Month (April) - Question 8

Define the following functions:
(a) (a M b) = a – b (b) (a D b) = a + b
(c) (a H b) = (ab) (d) (a P b) = a/b

Q.

What is the value of (3M4H2D4P8M2)?

Detailed Solution for CAT Practice Test: Month (April) - Question 8

3 – 4 × 2 + 4/8 – 2 = 3 – 8 + 0.5 – 2 = – 6.5
(using BODMAS rule)

CAT Practice Test: Month (April) - Question 9

Define the following functions:
(a) (a M b) = a – b (b) (a D b) = a + b
(c) (a H b) = (ab) (d) (a P b) = a/b

Q.

Which of the four functions defined has the minimum value?

Detailed Solution for CAT Practice Test: Month (April) - Question 9

The minimum would depend on the values of a and b. Thus, cannot be determined.

CAT Practice Test: Month (April) - Question 10

If 0 < a <1 and 0 < b < 1 and if a < b, which of the following expressions will have the highestvalue?

Detailed Solution for CAT Practice Test: Month (April) - Question 10

Again (a + b) or a/b can both be greater than each other depending on the values we take for a and b.
E.g. for a = 0.9 and b = 0.91, a + b > a/b.
For a = 0.1 and b = 0.11, a + b < a/b

CAT Practice Test: Month (April) - Question 11

What values of 'x' satisfy the inequality x2/3 + x1/3 - 2 ≤ 0?

Detailed Solution for CAT Practice Test: Month (April) - Question 11

x2/3 + x1/3 - 2 ≤ 0
Or (x1/3 - 1)(x1/3 + 2) ≤ 0
Or -8 ≤ x ≤ 1

CAT Practice Test: Month (April) - Question 12

If f(x) = x3 - 4x + p and f(0) and f(1) have opposite signs, then which of the following is necessarily true?

Detailed Solution for CAT Practice Test: Month (April) - Question 12

f(0) = p and f(1) = p - 3
Since f(0) and f(1) have opposite signs, so if p < 0, then p - 3 > 0, i.e. p > 3, which is not possible.
Or, p > 0 and p - 3 < 0
⇒ p < 3
⇒ 0 < p < 3
Hence, answer option 2 is correct.

CAT Practice Test: Month (April) - Question 13

a2 + b2 is always

Detailed Solution for CAT Practice Test: Month (April) - Question 13

As (a - b)2 is never negative.
a2 + b2 - 2ab is greater than or equal to zero.
Therefore, we can say that a2 + b2 ≥ 2ab.

CAT Practice Test: Month (April) - Question 14

If xyz = 8, then what is the minimum value of 2x + 2y + 2z?  

Detailed Solution for CAT Practice Test: Month (April) - Question 14

Since AM ≥ GM,

x + y + z ≥ 6
To get minimum value, take x + y + z = 6.

⇒ 2x + 2y + 2z ≥ 12
Minimum value = 12

CAT Practice Test: Month (April) - Question 15

How many pairs of natural numbers at (x, y) satisfy the inequality 3x + 5y < 20?  

Detailed Solution for CAT Practice Test: Month (April) - Question 15

(x, y) pairs satisfying the condition are (1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (3, 1), (3, 2) and (4, 1).
So, total 8 pairs are there.

CAT Practice Test: Month (April) - Question 16

For what values o f c in the equation 2x2 - (c3 + 8c - l)x + c2 - 4c = 0 the roots of the equation would be opposite in signs?

Detailed Solution for CAT Practice Test: Month (April) - Question 16

For the roots to be opposite in sign, the product should be negative.

(c2 - 4x)/2 < 0 ⇒ 0 < c < 4 .

CAT Practice Test: Month (April) - Question 17

The expression x2 + kx + 9 becomes positive for what values of k (given that x is real)?

Detailed Solution for CAT Practice Test: Month (April) - Question 17

The roots should be imaginary for the expression to be positive i.e.

k2 - 36 < 0

thus - 6 < k < 6 or |k| < 6.

CAT Practice Test: Month (April) - Question 18

In the Maths Olympiad of 2020 at Animal Planet, two representatives from the donkey’s side, while solving a quadratic equation, committed the following mistakes: (i) One of them made a mistake in the constant term and got the roots as 5 and 9. (ii) Another one committed an error in the coefficient of x and he got the roots as 12 and 4.But in the meantime, they realised that they are wrong and they managed to get it right jointly. Find the quadratic equation.

Detailed Solution for CAT Practice Test: Month (April) - Question 18

From (i) we have sum o f roots = 1 4 and from (ii) we have product of roots = 48.
Option (c) is correct.

CAT Practice Test: Month (April) - Question 19

For what value of b and c would the equation x2 + bx + c = 0 have roots equal to b and c.

Detailed Solution for CAT Practice Test: Month (April) - Question 19

Solve using options. It can be seen that at b = 0 and c = 0 the condition is satisfied. It is also satisfied at b = 1 and c = - 2 .

CAT Practice Test: Month (April) - Question 20

A journey between Mumbai and Pune (192 km apart) takes two hours less by a car than by a truck. Determine the average speed of the car if the average speed of the truck is 16 km/h less than the car.

Detailed Solution for CAT Practice Test: Month (April) - Question 20

Solve using options, If the car’s speed is 48 kmph, the bus’s speed would be 32 kmph. The car would take 4 hours and the bus 6 hours.A journey between Mumbai and Pune (192 km apart) takes two hours less by a car than by a truck. Determine the average speed of the car if the average speed of the truck is 16 km/h less than the car. (a) 48 km/h (b) 64 km/h (c) 16 km/h (d) 24 km/h

CAT Practice Test: Month (April) - Question 21

Direction: The question consists of three statements followed by two conclusions labelled I and II. Consider the statements to be true even if they are at variance from the commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follow(s) from the given statements.

Statements:
All Punjabi is Nigerian.
Some German is Punjabi.
Some European is German.
All American is Nigerian.
Conclusions:
I. All German is Nigerian.
II. Some European is American.
III. Some Punjabi is European.

Detailed Solution for CAT Practice Test: Month (April) - Question 21

None of the conclusion is true.

CAT Practice Test: Month (April) - Question 22

Directions: In the question below are given three statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the statements and then decide which of the given conclusions logically follow(s) from the given statements, disregarding commonly known facts.

Statements:
Some messages are important.
Some important are urgent.
No important is required.
Conclusions:
I. All required may be messages.
II. Some urgent are not important.
III. Some required is urgent.

Detailed Solution for CAT Practice Test: Month (April) - Question 22

As per the Venn diagrams made according to the statements, only conclusion I follows.

CAT Practice Test: Month (April) - Question 23

Directions: In the question below, four statements are followed by conclusions numbered I, II, III and IV. You have to take the given statements to be true, even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follow(s) from the given statements, disregarding commonly known facts.

Statements:
Some pencils are kites.
Some kites are desks.
All desks are jungles.
All jungles are mountains.
 

Conclusions:
I. Some mountains are pencils.
II. Some jungles are pencils.
III. Some mountains are desks.
IV. Some jungles are kites.

Detailed Solution for CAT Practice Test: Month (April) - Question 23

Only III and IV follow

CAT Practice Test: Month (April) - Question 24

Directions: In the question below, four statements are followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follow(s) from the given statements, disregarding commonly known facts.

Statements:
All birds are horses.
All horses are tigers.
Some tigers are lions.
Some lions are monkeys.
Conclusions:
I. Some tigers are horses.
II. Some monkeys are birds.
III. Some tigers are birds.
IV. Some monkeys are horses.

Detailed Solution for CAT Practice Test: Month (April) - Question 24

Only conclusion I and III follow.

CAT Practice Test: Month (April) - Question 25

Direction: In the question below, three statements are given followed by two conclusions numbered I and II. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the statements and then decide which of the two conclusions logically follow(s) from the given statements, disregarding commonly known facts.

Statements:
Some buildings are sofas.
Some sofas are benches.
Some benches are tables.
 

Conclusions:
I. Some tables are sofas.
II. No table is a sofa.

Detailed Solution for CAT Practice Test: Month (April) - Question 25

Or

So, option (3) is correct.

CAT Practice Test: Month (April) - Question 26

Pointing to Varman, Madhav said, "I am the only son of one of the sons of his father." How is Varman related to Madhav?

Detailed Solution for CAT Practice Test: Month (April) - Question 26

Madhav is the only son of one of the sons of Varman's father → Either Varman is the father or uncle of Madhav.

CAT Practice Test: Month (April) - Question 27

If A + B means A is the brother of B; A % B means A is the father of B and A x B means A is the sister of B. Which of the following means M is the uncle of P?

Detailed Solution for CAT Practice Test: Month (April) - Question 27

M + K → M is the brother of K

K % T → K is the father of T

T x P → T is the sister of P

Therefore, K is the father of P and M is the uncle of P.

CAT Practice Test: Month (April) - Question 28

Introducing a woman, Shashank said, "She is the mother of the only daughter of my son." How that woman is related to Shashank?

Detailed Solution for CAT Practice Test: Month (April) - Question 28

The woman is the mother of Shashank's granddaughter. Hence, the woman is the daughter-in-law of Shashank.

CAT Practice Test: Month (April) - Question 29

If A + B means B is the brother of A; A x B means B is the husband of A; A - B means A is the mother of B and A % B means A is the father of B, which of the following relations shows that Q is the grandmother of T?

Detailed Solution for CAT Practice Test: Month (April) - Question 29

Q - P → Q is the mother of P

P + R → R is the brother of P

Hence, → q is the mother of R

R % T → R is the father of T.

Hence, Q is the grandmother of T.

CAT Practice Test: Month (April) - Question 30

 

  1. A3P means A is the mother of P
  2. A4P means A is the brother of P
  3. A9P means A is the husband of P
  4. A5P means A is the daughter of P

Which of the following means that K is the mother-in-law of M?

 

Detailed Solution for CAT Practice Test: Month (April) - Question 30

M9N → M is the husband of N

N5K → N is the daughter of K

Hence, → M is the son-in-law of K

K3J → K is the mother of J

Hence, → K is a lady

Hence, → K is the mother-in-law of M.

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