CBSE Class 6 Mathematics Prime Time MCQs Set D

Question. The largest number, which always divides the sum of any pair of consecutive odd numbers is
(a) 2
(b) 4
(c) 6
(d) 8

Answer: B

Question. If sum of factors of 28 is 56, then 28 is called a
(a) Simple number
(b) Perfect number
(c) Small number
(d) Prime number

Answer: B

Question. Which number is neither prime nor composite?
(a) 1
(b) 2
(c) 3
(d) 4

Answer: A

Question. To check divisibility by 8, we look at the last
(a) One digit
(b) Two digits
(c) Three digits
(d) Five digits

Answer: C

Question. The number with unit digit 8 is divisible by:
(a) 2
(b) 3
(c) 4
(d) 5

Answer: A

Question. If a jump size lands on two different numbers, it is called a
(a) Common multiple
(b) Common factor
(c) Safe jump
(d) Fast jump

Answer: B

Question. How many factors does 28 have?
(a) 4
(c) 5
(c) 6
(d) 7

Answer: C

Question. Numbers divisible by 5 end with 5 or
(a) 2
(b) 0
(c) 10
(d) 3

Answer: B

Question. What is the greatest common factor of 15 and 30?
(a) 15
(b) 10
(c) 5
(d) 20

Answer: A

Question. In the Sieve method, the first number we cross out is
(a) 2
(b) 1
(c) 10
(d) 5

Answer: B

Question. The number of distinct prime factors of the largest 4- digit number is
(a) 2
(b) 3
(c) 5
(d) 11

Answer: B

Question. To check if a number is divisible by 4, we look at the last
(a) One digit
(b) Two digits
(c) Three digits
(d) Four digits

Answer: B

Question. Which of the following numbers is divisible by 3?
(a) 22
(b) 33
(c) 44
(d) 55

Answer: B

Question. Prime numbers are the building blocks of
(a) All whole numbers
(b) Only even numbers
(c) Only odd numbers
(d) Tables

Answer: A

Question. What is the least common multiple of 6 and 8?
(a) 24
(b) 48
(c) 36
(d) 12

Answer: A

Question. 80 and 63 are co-prime because they have no common
(a) Even factors
(b) Prime factors
(c) Odd factors
(d) Last digits

Answer: B

Question. 2 × 3 × 7 is the prime factorization of
(a) 21
(b) 1237
(c) 237
(d) 42

Answer: D

Question. The numbers 1, 2, 3, 4, 6, 8, 12, 24 are called
(a) Factors of 24
(b) Multiples of 24
(c) Primes of 24
(d) Idli numbers

Answer: A

Question. What jump size will let Jumpy land on both 15 and 30?
(a) 2
(c) 3
(c) 5
(d) 15

Answer: D

Question. Prime numbers are called the building blocks of
(a) Only odd numbers
(b) All whole numbers
(c) Tables
(d) Circles

Answer: B