Q. The relation R defined on the set of natural numbers as {(a, b): a differs from b by 3} is given
✅ Correct Answer: (B)
{ (4, 1), (5, 2), (6, 3), ….}
Discrete Mathematics MCQs | Page - 4
Dear candidates you will find MCQ questions of Discrete Mathematics here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. Two finite sets A and B have m and n elements respectively. If the total number of subsets of A is 112 more than the total number of subsets of B, then the value of m is
✅ Correct Answer: (A)
7
Q. Let X and Y be the sets of all positive divisors of 400 and 1000 respectively (including 1 and the number). Then, n (X ÇY) is equal to
✅ Correct Answer: (D)
12
Q. Let R = { ( 3, 3 ) ( 6, 6 ) ( ( 9, 9 ) ( 12, 12 ), ( 6, 12 ) ( 3, 9 ) ( 3, 12 ), ( 3, 6 ) } be a relation on the set A = { 3, 6, 9, 12 }. The relation is
✅ Correct Answer: (A)
reflexive and transitive
Q. Let f : ( - 1, 1 ) → B be a function defined by f ( x ) = 2 1 x 1 2x tan - - , then f is both one-one and onto when B is the interval
✅ Correct Answer: (D)
((-π)/2,π/2)
Q. Let R be the set of real numbers. If f : R → R is a function defined by f ( x ) = x2 , then f is]
✅ Correct Answer: (D)
none of these
Q. Which of the following statement is a proposition?
✅ Correct Answer: (D)
the only odd prime number is 2
Q. What is the value of x after this statement, assuming the initial value of x is 5? ‘If x equals to one then x=x+2 else x=0’.
✅ Correct Answer: (C)
0
Q. Let P: I am in Bangalore.; Q: I love cricket.; then q -> p(q implies p) is?
✅ Correct Answer: (A)
if i love cricket then i am in bangalore
Q. Let P: If Sahil bowls, Saurabh hits a century.; Q: If Raju bowls, Sahil gets out on first ball. Now if P is true and Q is false then which of the following can be true?
✅ Correct Answer: (C)
sahil bowled and saurabh hits a century
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