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Gyaan Maths
CBSE · Class 6-12
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CBSE Maths · Class 6

Chapter 5: Prime Time

Name: ________________________
Date: ______________
Marks: ____ / 6

Factors, multiples, primes, composites, HCF and LCM.

Questions

  1. Prime or composite: 29?
  2. Prime factorise 60.
  3. HCF(18, 24).
  4. LCM(10, 15).
  5. First 3 multiples of 7.
  6. HCF × LCM of 12, 18.

Extra Practice (Optional)

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Answer Key (For Teachers)

  1. Answer: Prime
    Working: Factors: 1, 29.
  2. Answer: 22⋅3⋅52^2\cdot 3\cdot 5
    Working: 60=22⋅3⋅560=2^2\cdot 3\cdot 5.
  3. Answer: 66
    Working: 2⋅32\cdot 3.
  4. Answer: 3030
    Working: 2⋅3⋅52\cdot 3\cdot 5.
  5. Answer: 7,14,217,14,21
    Working: 7,14,217,14,21.
  6. Answer: 216216
    Working: =12⋅18= 12\cdot 18.
Gyaan Maths · CBSE Class 6 · Chapter 5
Gyaan Maths — CBSE Class 6-12, built for board-toppers.
v1.1 · Sept 2026