Question

What is the greates common facter of 18 and 63

Answer 1

Hello !

The greats common factor of 18 and 63 is 9.

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Answer 2

63/18 = 3 r 9

18/9 = 2 r 0 . . . . . the remainder of the previous step is the divisor for this step

By Euclid's algorithm, the GCF is 9.

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63 = 3²·7

18 = 2·3²

Examining the factors of these numbers, we see the greatest common factor is 3² = 9.