CBSE Class 6 Mathematics Prime Time MCQs Set J

Question. True or False: All even numbers are composite numbers.
(a) True
(b) False
(c) Only for 10
(d) Sometimes

Answer: B

Question. Which number is divisible by both 2 and 4 but not by 8?
(a) 24
(b) 20
(c) 16
(d) 8

Answer: B

Question. After crossing multiples of 2 and 3, the next uncrossed number is
(a) 4
(b) 6
(c) 5
(d) 7

Answer: C

Question. Which of the following is not a prime number?
(a) 17
(b) 19
(c) 21
(d) 23

Answer: C

Question. If two numbers are co-prime, their first common multiple is their
(a) Sum
(b) Difference
(c) Product
(d) Factor

Answer: C

Question. Which two-digit number is a palindrome and prime?
(a) 11
(b) 33
(c) 22
(d) 44

Answer: A

Question. To find primes, we circle 2 and then cross out all its
(a) Factors
(b) Multiples
(c) Neighbors
(d) Primes

Answer: B

Question. Which of these pairs are NOT co-prime?
(a) 13 and 15
(b) 21 and 28
(c) 35 and 48
(d) 17 and 20

Answer: B

Question. For every prime except 2 and 3, the next number is always
(a) Prime
(b) Composite
(c) Odd
(d) Zero

Answer: B

Question. Which of the following numbers is composite?
(a) 5
(b) 11
(c) 9
(d) 19

Answer: C

Question. When we multiply 2, 3 and 5 in any order, the result is
(a) Different
(b) Same
(c) Zero
(d) 10

Answer: B

Question. What is the prime factorization of 36?
(a) 2 × 18
(b) 3 × 12
(c) 2 × 2 × 3 × 3
(d) 2 × 3 × 6

Answer: C

Question. Anshu can pack 7 figs in only one way because 7 has only
(a) One factor
(b) Two factors
(c) Three factors
(d) Many factors

Answer: B

Question. Which of these numbers is the product of exactly 3 distinct primes?
(a) 60
(b) 91
(c) 45
(d) 105

Answer: D

Question. For any number, how many ways are there to do prime factorisation?
(a) Many ways
(b) Only one way
(c) Two ways
(d) Ten ways

Answer: B

Question. What is the largest prime number less than 50?
(a) 47
(b) 43
(c) 45
(d) 41

Answer: A

Question. If one number is divisible by another, its prime factorisation is
(a) Bigger
(b) Included in the first
(c) Not same
(d) Smaller

Answer: B

Question. Which number below is a composite number?
(a) 13
(b) 17
(c) 20
(d) 19

Answer: C

Question. 15 and 39 are not co-prime because they both have a common factor
(a) 5
(b) 3
(c) 2
(d) 1

Answer: B

Question. 168 is divisible by 12 because 168 is 12 multiplied by
(a) 10
(b) 14
(c) 7
(d) 2

Answer: B