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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