Explore topic-wise MCQs in Aptitude.

This section includes 68 Mcqs, each offering curated multiple-choice questions to sharpen your Aptitude knowledge and support exam preparation. Choose a topic below to get started.

51.

Let A = {1, 2, {3, 4}, 5}. Which of the following statements is true?

A. {3, 4} A
B. {3, 4} A
C. 1 A
D. {1, 2, 5} A
Answer» C. 1 A
Discussion
52.

If A = { x : x = n-1/n+1, n W and n 10 } ;point out the correct statement from the following:

A. 0 A
B. 0 A
C. 0 A
D. 1/3 A
Answer» B. 0 A
Discussion
53.

If the number of items in a set A is n(A) = 40. If n(B) = 26 and n(A B) = 16 then n(A B) is equal to:

A. 30
B. 40
C. 50
D. 60
Answer» D. 60
Discussion
54.

Let A = {x: x N x is a multiple of 2}

A. A
B. B
C. C
D. None of these
Answer» D. None of these
Discussion
55.

In a certain office, 72% of the workers prefer cold drink and 44% prefer tea. If each of them prefers cold drink or tea and 40 like both, then the total number of workers in the office is:

A. 40
B. 240
C. 220
D. 210
Answer» B. 240
Discussion
56.

In an examination, 40% students failed in Hindi, 50% students failed in English. If 21% students failed in both the subjects, find the percentage of those who passed in Hindi.

A. 31%
B. 40%
C. 55%
D. 60%
Answer» E.
Discussion
57.

In a survey of a town, it was found that 65% of the people surveyed watch the news on T.V. 40% read a newspaper and 25% read a newspaper and watch the news on T.V. What per cent of the people surveyed neither watch the news on T.V. nor read a newspaper?

A. 5%
B. 10%
C. 20%
D. 15%
Answer» D. 15%
Discussion
58.

Which of the following sets is finite?

A. The set of the months of a year
B. {1, 2, 3, }
C. {1, 2, 3, 90, 100}
D. The set of lines which are parallel to x-axis
E. The set of numbers which are multiples of 5.
Answer» B. {1, 2, 3, }
Discussion
59.

Write down the power set of C = {1, {2}}.

A. { , {1}, {{2}}}
B. { , {1}, {{2}}, {1, {2}}}
C. {{1}, {{2}}, {1, {2}}
D. None of these
Answer» C. {{1}, {{2}}, {1, {2}}
Discussion
60.

Which of the following sets is non-empty?

A. A = set of odd natural numbers divisible by 2
B. B = {x : x + 5 = 0, x N}
C. C = set of even prime numbers
D. D = {x : 1 < x < 2, x N},
Answer» D. D = {x : 1 < x < 2, x N},
Discussion
61.

Let A = { , { }, 1, {1, }, 7}. Which of the following is false?

A. A
B. { } A
C. {1} A
D. {7, ,} A
Answer» D. {7, ,} A
Discussion
62.

Write down the power set of the set {0}.

A.
B. {0}
C. { }
D. { , {0}}
Answer» E.
Discussion
63.

Find the cardinal number of the following set {x: x is a natural number 30 and is divisible by 7 or 11}

A. 4
B. 8
C. 6
D. 2
Answer» D. 2
Discussion
64.

Which of the following sets is empty?

A. A = {x: x n and x 1}
B.
C. B = {x: 3x + 1 = 0, x N}
D. C = {x: x is an integer and -1 < x < 1}
E. D = set of months of the year beginning with F.
Answer» C. B = {x: 3x + 1 = 0, x N}
Discussion
65.

Let A = {1, 2}, B = {2, 3}. Evaluate A B.

A. {(2, 1), (3, 1), (2, 3)}
B. {(1, 2), (1, 3), (2, 3)}
C. {(1, 2), (1, 3), (2, 2), (2, 3)}
D. None of these
Answer» D. None of these
Discussion
66.

The Cartesian product

A. A = {0, 1}
B. A = {-1, 0, 1}
C. A = {0, -1}
D. A = {1, -1,}
Answer» C. A = {0, -1}
Discussion
67.

Let A = {1, 3, 5} and B = {x: x is an odd natural number < 6}. Which of the following is false?

A. A B
B. B A
C. A = B
D. None of these
Answer» E.
Discussion
68.

If U = {a, b, c, d, e, f}, A = {a, b, c}, find (U A) .

A. U
B. A
C.
D. None of these
Answer» D. None of these
Discussion