CBSE Class 6 Mathematics Prime Time MCQs Set F

Question. The number 105 is a product of how many distinct prime numbers?
(a) 2
(b) 3
(c) 4
(d) 5

Answer: B

Question. Which number is a common factor of 24 and 36?
(a) 5
(b) 8
(c) 12
(d) 18

Answer: C

Question. A number that divides another number exactly is called a
(a) Multiple
(b) Factor
(c) Even
(d) Vada

Answer: B

Question. The number of prime numbers between 1 and 10 is:
(a) 3
(b) 4
(c) 5
(d) 6

Answer: B

Question. When a number is both a multiple of 3 and 5, the player says
(a) Idli
(b) Vada
(c) Idli-Vada
(d) Chutney

Answer: C

Question. What is the greatest common factor (GCF) of 24 and 36?
(a) 6
(b) 12
(c) 18
(d) 24

Answer: B

Question. To check if two numbers are co-prime, we see if they have common
(a) Prime factors
(b) Multiples
(c) Sums
(d) Digits

Answer: A

Question. Which pair of number is coprime?
(a) 4 and 6
(b) 9 and 12
(c) 8 and 15
(d) 12 and 18

Answer: C

Question. Which of these is a pair of twin primes?
(a) 3 and 5
(b) 2 and 3
(c) 5 and 10
(d) 7 and 11

Answer: A

Question. A number is divisible by 5 and 6. It may not be divisible by
(a) 10
(b) 15
(c) 30
(d) 60

Answer: D

Question. The only even prime number is
(a) 4
(b) 2
(c) 6
(d) 8

Answer: B

Question. The number of distinct prime factors of the smallest 5- digit number is
(a) 2
(b) 4
(c) 6
(d) 8

Answer: A

Question. Smallest number whose prime factorisation has four different primes is
(a) 100
(b) 210
(c) 120
(d) 40

Answer: B

Question. What is the prime factorization of 72?
(a) 2³ × 3²
(c) 2² × 3³
(c) 2⁴ × 3
(d) 2² × 3²

Answer: A

Question. If a number is a multiple of 5, the player says
(a) Idli
(b) Vada
(c) Idli-Vada
(d) Sambhar

Answer: B

Question. Which of the following pairs is co-prime?
(a) 20 and 24
(b) 5 and 16
(c) 30 and 45
(d) 28 and 35

Answer: B

Question. Factors of 14 are 1, 2, 7 and
(a) 3
(b) 14
(c) 28
(d) 5

Answer: B

Question. Three prime numbers less than 20, whose product is 231.
(a) 3, 7 and 11
(b) 3, 5 and 7
(c) 7,11 and 13
(d) None of the options

Answer: A

Question. The number 1 is
(a) Prime
(b) Composite
(c) Neither prime nor composite
(d) Both prime and composite

Answer: C

Question. Which of the following numbers are co-prime?
(a) 18 and 35
(b) 16 and 24
(c) 30 and 45
(d) 21 and 49

Answer: A