Question

Find the HCF of 144, 252, 630 by common division method.

Answer 1

Answer:

All the factors of 144 are 2 x 2 x 2 x 2 x 3 x 3

All the factors of 252 are 2 x 2 x 3 x 3 x 7

All the factors of 630 are 2 x 3 x 3 x 5 x 7

Common factors of 144, 252 and 630 are 2 x 3 x 3

Thus, the highest common factor of 144, 252 and 630 is 18

Hence, HCF of 144, 252 and 630= 18

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