Explore topic-wise MCQs in Discrete Mathematics.

This section includes 175 Mcqs, each offering curated multiple-choice questions to sharpen your Discrete Mathematics knowledge and support exam preparation. Choose a topic below to get started.

151.

(12345679 x 72) = ?

A. 88888888
B. 888888888
C. 898989898
D. 9999999998
Answer» C. 898989898
Discussion
152.

The cube root of .000216 is:

A. .6
B. .06
C. 77
D. 87
Answer» C. 77
Discussion
153.

(800 ÷ 64) x (1296 ÷36) = ?

A. 420
B. 460
C. 500
D. None of these
Answer» E.
Discussion
154.

How many terms are there in the G.P. 3, 6, 12, 24, ... , 384 ?

A. 8
B. 9
C. 10
D. 11
Answer» B. 9
Discussion
155.

Find the odd man out:2, 5, 10, 17, 26, 37, 50, 64

A. 50
B. 26
C. 37
D. 64
Answer» E.
Discussion
156.

The difference of the squares of two consecutive odd integers is divisible by which of the following integers ?

A. 3
B. 6
C. 7
D. 8
Answer» E.
Discussion
157.

On dividing a number by 68, we get 269 as quotient and 0 as remainder. On dividing the same number by 67, what will the remainder ?

A. 0
B. 1
C. 2
D. 3
Answer» C. 2
Discussion
158.

106 x 106 - 94 x 94 = ?

A. 2400
B. 2000
C. 1904
D. 1906
Answer» B. 2000
Discussion
159.

If a and b are odd numbers, then which of the following is even ?

A. a + b
B. a + b + 1
C. ab
D. ab + 2
Answer» B. a + b + 1
Discussion
160.

If x and y are positive integers such that (3x + 7y) is a multiple of 11, then which of the following will be divisible by 11 ?

A. 4x + 6y
B. x + y + 4
C. 9x + 4y
D. 4x - 9y
Answer» E.
Discussion
161.

What least number must be added to 1056, so that the sum is completely divisible by 23 ?

A. 2
B. 3
C. 18
D. 21
Answer» B. 3
Discussion
162.

It is being given that (2^32 + 1) is completely divisible by a whole number. Which of the following numbers is completely divisible by this number?

A. (2^16 + 1)
B. (2^16 - 1)
C. (7 x 2^23)
D. (2^96 + 1)
Answer» E.
Discussion
163.

1397 x 1397 = ?

A. 1951609
B. 1981709
C. 18362619
D. 2031719
Answer» B. 1981709
Discussion
164.

Which one of the following is not a prime number?

A. 31
B. 61
C. 71
D. 91
Answer» E.
Discussion
165.

(112 x 5^4) = ?

A. 67000
B. 70000
C. 76500
D. 77200
Answer» C. 76500
Discussion
166.

THE_LINEAR_COMBINATION_OF_GCD(10_,11)_=_1_CAN_BE_WRITTEN_AS?$

A. (-1)*10 + 1*11
B. (-2)*10 + 2*11
C. 1*10 + (-1)*11
D. (-1)*10 + 2*11
Answer» B. (-2)*10 + 2*11
Discussion
167.

The_value_of_52003_mod_7_is$

A. 3
B. 4
C. 8
D. 9
Answer» B. 4
Discussion
168.

The solution of the linear congruence 4x = 5(mod 9) i?
A. 6(mod 9)
B. 8(mod 9)
C. 9(mod 9)
D. 10(mod 9)
Answer» C. 9(mod 9)
Discussion
169.

The integer 2821 is a Carmichael number.
A. True
B. False
Answer» B. False
Discussion
170.

The inverse of 19 modulo 141 is

A. 50
B. 51
C. 54
D. 52
Answer» E.
Discussion
171.

The inverse of 7 modulo 26 is
A. 12
B. 14
C. 15
D. 20
Answer» D. 20
Discussion
172.

The linear combination of gcd(117, 213) = 3 can be written as
A. 11*213 + (-20)*117
B. 10*213 + (-20)*117
C. 11*117 + (-20)*213
D. 20*213 + (-25)*117
Answer» B. 10*213 + (-20)*117
Discussion
173.

The integer 561 is a Carmichael number.
A. True
B. False
Answer» B. False
Discussion
174.

The inverse of 3 modulo 7 is
A. -1
B. -2
C. -3
D. -4
Answer» C. -3
Discussion
175.

The linear combination of gcd(252, 198) = 18 is

A. 252*4 – 198*5
B. 252*5 – 198*4
C. 252*5 – 198*2
D. 252*4 – 198*4
Answer» B. 252*5 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 198*4
Discussion