Question

find the lcm and hcf of 72 ,56 ,108 by prime factorization method.​

Answer 1

Answer:

Prime factors of 56 = 2 ×2×2×7

Prime factors of 72 = 2×2×2×3×3

Prime factors of 108 = 2×2×3×3

Common prime factors: 2×2

Hcf =4

LcM = 2×2×2 ×3×3 ×7=504

Answer 2

Answer:

72 = 2×2×2×3×3

108 = 2×2×3×3×3

56 = 2×2×2×7

2 × 2 = 4

so ans is 4