Class 8 Maths – Playing with Numbers MCQ

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1. Which of the following numbers is divisible by both 2 and 5?

a) 45
b) 125
c) 80
d) 33

Answer:

c) 80

Explanation:

80 is even (divisible by 2) and ends in 0 (divisible by 5).

2. What is the smallest prime number?

a) 0
b) 1
c) 2
d) 3

Answer:

c) 2

Explanation:

2 is the smallest and only even prime number.

3. Which of these numbers is a perfect square?

a) 44
b) 64
c) 101
d) 27

Answer:

b) 64

Explanation:

64 is 8^2, making it a perfect square.

4. How many factors does the number 28 have?

a) 4
b) 6
c) 8
d) 5

Answer:

b) 6

Explanation:

The factors are 1, 2, 4, 7, 14, and 28.

5. The HCF of two prime numbers is:

a) 1
b) 0
c) The product of the two numbers
d) One of the prime numbers

Answer:

a) 1

Explanation:

Prime numbers have no common factors other than 1.

6. If a number is divisible by both 3 and 4, it is also divisible by:

a) 7
b) 8
c) 12
d) 9

Answer:

c) 12

Explanation:

The LCM of 3 and 4 is 12.

7. The number 0 is:

a) Only even
b) Only odd
c) Neither even nor odd
d) Both even and odd

Answer:

c) Neither even nor odd

Explanation:

0 is neither classified as even nor odd.

8. Which number is not a composite number?

a) 91
b) 1
c) 49
d) 100

Answer:

b) 1

Explanation:

1 is neither prime nor composite.

9. What is the next prime number after 5?

a) 6
b) 7
c) 8
d) 9

Answer:

b) 7

Explanation:

7 is the prime number following 5.

10. The smallest composite number is:

a) 1
b) 2
c) 3
d) 4

Answer:

d) 4

Explanation:

4 is the smallest number that is not prime and not 1.

11. If a number ends in 0, 2, 4, 6, or 8, it is:

a) Odd
b) Even
c) Prime
d) Composite

Answer:

b) Even

Explanation:

Numbers ending in 0, 2, 4, 6, or 8 are even numbers.

12. The number of factors a prime number has is:

a) 0
b) 1
c) 2
d) More than 2

Answer:

c) 2

Explanation:

Prime numbers have only two factors: 1 and the number itself.

13. Which of these is a factor of every number?

a) 0
b) 1
c) 2
d) 10

Answer:

b) 1

Explanation:

Every number is divisible by 1.

14. The number 11 is:

a) Even
b) Odd
c) Neither even nor odd
d) Composite

Answer:

b) Odd

Explanation:

11 is an odd prime number.

15. Which of these numbers is divisible by 9?

a) 122
b) 981
c) 540
d) 432

Answer:

b) 981

Explanation:

The sum of digits of 981 is 18, which is divisible by 9.

16. Which is not a prime number?

a) 41
b) 17
c) 27
d) 19

Answer:

c) 27

Explanation:

27 is 3^3 and hence not a prime number.

17. Which of the following numbers is divisible by both 6 and 8?

a) 44
b) 64
c) 24
d) 72

Answer:

d) 72

Explanation:

72 is divisible by both 6 and 8.

18. Which of the following is the smallest even prime number?

a) 1
b) 2
c) 0
d) 4

Answer:

b) 2

Explanation:

2 is the smallest and only even prime number.

19. What is the sum of the first two prime numbers?

a) 2
b) 5
c) 3
d) 7

Answer:

d) 7

Explanation:

The sum of 2 and 5 is 7.

20. If a number is divisible by 2 and not divisible by 4, it must:

a) End in 00
b) End in 2 or 6
c) End in 4 or 8
d) End in 5

Answer:

b) End in 2 or 6

Explanation:

Numbers ending in 2 or 6 are divisible by 2 but not by 4.

Related MCQ (Multiple Choice Questions) :

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