Answer:
9
Step-by-step explanation:
9 x 11 = 99
9 x 7 = 63
The Greatest Common Factor (GCF) for 63 and 99, notation CGF(63,99), is 9. Step-by-step explanation: The factors of 63 are 1,3,7,9,21,63; The factors of 99 are 1,3,9,11,33,99.
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