Question

find the hcf of 644 and 728​

Answer 1

Answer:

644 = 2 × 2 × 7 × 23

728 = 7 × 2 × 2 × 2 × 13

The HCF is 28

Answer 2

644 = 2 x 2 x 7 x 23

728 = 2 x 2 x 2 x 7 x 13

Hence, HCF of 644 &728 = 2 x 2 x 7

= 28

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