900
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The Greatest Common Factor (GCF) is: 15
The GCF is 5.
Ummmmm. Your question has no answer as it is written. Either you want the greatest common factor or the least common multiple. Here is both. 36 factors to [2 2 3 3] 90 factors to [2 3 3 5] Common factors are [2 3 3] = 18 ◄ LCM is the product of both numbers divided by the GCF. 36 * 90 / 18 = 180 ◄
60, 72, 84, 90 and 96 each have twelve factors.
The greatest common factor of 99 and 90 is 9.