CBSE Class 6 Mathematics Prime Time MCQs Set A

Question. In the ‘idli-vada’ game, which of these numbers would you say ‘idli-vada’ for?
(a) 10
(b) 15
(c) 20
(d) 25

Answer: B

Question. What is the prime factorization of 18?
(a) 2 × 3 × 3
(b) 2 × 2 × 3
(c) 2 × 9
(d) 3 × 6

Answer: A

Question. What are the common factors of 14 and 36?
(a) 1 and 2
(b) 1 and 7
(c) 1 and 4
(d) 1 and 3

Answer: A

Question. What is the smallest prime number?
(a) 1
(b) 2
(c) 3
(d) 5

Answer: B

Question. Which of these numbers is divisible by both 4 and 5?
(a) 20
(b) 30
(c) 40
(d) 45

Answer: A

Question. What is the smallest prime number greater than 10?
(a) 11
(b) 13
(c) 14
(d) 12

Answer: A

Question. Which number below has exactly three distinct prime factors?
(a) 30
(b) 45
(c) 60
(d) 91

Answer: A

Question. Which number has 1, 2, 4, 7, 14, and 28 as its factors?
(a) 14
(b) 28
(c) 21
(d) 35

Answer: B

Question. Which is the first even prime number?
(a) 2
(b) 4
(c) 6
(d) 8

Answer: A

Question. Which of these is a co-prime pair?
(a) 12 and 18
(b) 15 and 35
(c) 17 and 29
(d) 25 and 30

Answer: C

Question. Which of the following is a prime number?
(a) 8
(b) 12
(c) 7
(d) 15

Answer: C

Question. Which of these is a twin prime pair?
(a) 29 and 31
(b) 21 and 23
(c) 33 and 35
(d) 2 and 4

Answer: A

Question. Which of these numbers is not divisible by 4?
(a) 24
(b) 32
(c) 36
(d) 42

Answer: D

Question. Which of the following is a common multiple of 3 and 5?
(a) 6
(b) 9
(c) 15
(d) 12

Answer: C

Question. What is the smallest number divisible by all numbers from 1 to 10?
(a) 100
(b) 360
(c) 2520
(d) 1230

Answer: C

Question. Which number is a perfect square and also a composite number?
(a) 2
(b) 5
(c) 9
(d) 13

Answer: C

Question. Which of these numbers will fail the divisibility test for 2?
(a) 16
(b) 24
(c) 31
(d) 48

Answer: C

Question. Which of these numbers is neither prime nor composite?
(a) 0
(b) 1
(c) 7
(d) 6

Answer: B

Question. In the prime sieve method, which number is crossed out first after 2?
(a) 3
(b) 5
(c) 4
(d) 6

Answer: C

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

Answer: C

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

Answer: A

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

Answer: C

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

Answer: D

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

Answer: A

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

Answer: C