Hello !
The greats common factor of 18 and 63 is 9.
Bye :)
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.
