Question

18. Find the HCF and LCM of 12, 72 and 120, using the prime factorisation method.
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Answer 1

Answer:

Hcf is 12 and lcm is 360....

12=2×2×3

72=2×2×3×2×3

120=2×2×3×2×5

common factors is 2×2×3=12

HCf is 12

Lcm is:12=2×2×3

72=2×2×3×3×2

120=2×2×3×5

12×15×2=360