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Gyaan Maths
CBSE · Class 6-12
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CBSE Maths · Class 7

Chapter 11: Finding Common Ground

Name: ________________________
Date: ______________
Marks: ____ / 5

Highest common factors, lowest common multiples, and applications.

Questions

  1. HCF(20, 30).
  2. LCM(4, 6).
  3. HCF × LCM of 8, 12.
  4. LCM(3, 4, 5).
  5. Two bells ring every 12 & 18 min. Together after?

Extra Practice (Optional)

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Answer Key (For Teachers)

  1. Answer: 1010
    Working: 2⋅52\cdot 5.
  2. Answer: 1212
    Working: 22⋅32^2\cdot 3.
  3. Answer: 9696
    Working: 8⋅128\cdot 12.
  4. Answer: 6060
    Working: Product.
  5. Answer: 3636 min
    Working: LCM(12,18).
Gyaan Maths · CBSE Class 7 · Chapter 11
Gyaan Maths — CBSE Class 6-12, built for board-toppers.
v1.1 · Sept 2026