NCERT Class 7 Maths Chapter 6 Number Play Worksheet with Answers

NCERT Class 7 Maths Chapter 6 Number Play Worksheet with Answers

Class 7 Maths Chapter 6 Worksheet

Fill in the Blanks

1. A number having exactly two factors is called a __________ number.
Answer: Prime

2. The only even prime number is __________.
Answer: 2

3. The HCF of 18 and 24 is __________.
Answer: 6

4. The LCM of 12 and 18 is __________.
Answer: 36

5. The prime factorization of 24 is __________.
Answer: 2 × 2 × 2 × 3


Write True or False

6. 37 is a prime number.
Answer: True

7. 45 is a prime number.
Answer: False

8. The HCF of two co-prime numbers is 1.
Answer: True

9. Every even number is a prime number.
Answer: False

10. Prime factorization helps in finding the HCF and LCM.
Answer: True


Short Answer Questions

11. Write the first five prime numbers.
Answer: 2, 3, 5, 7, 11

12. Find the HCF of 20 and 30.
Answer: 10

13. Find the LCM of 8 and 12.
Answer: 24

14. Is 252 divisible by 9? Give a reason.
Answer: Yes. The sum of its digits is 2 + 5 + 2 = 9, which is divisible by 9.

15. Why is prime factorization important?
Answer: It helps in finding the HCF, LCM, and solving various mathematical problems efficiently.

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