Factor them.
2 x 2 x 2 x 2 x 19 = 304
2 x 2 x 2 x 3 x 37 = 888
Select the common factors.
2 x 2 x 2 = 8, the GCF
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Factor them.
2 x 3 x 7 x 17 = 714
3 x 7 x 11 x 13 = 3003
Select the common factors.
3 x 7 = 21, the GCF
The factors of 466 are:
1, 2, 233, 466
The factors of 724 are:
1, 2, 4, 181, 362, 724
The Greatest Common Factor:
GCF = 2
It is not possible to give a sensible answer to this question. The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
You need at least two numbers to find a GCF. If that's 16 and 66, the GCF is 2.
The GCF is 2.
You need at least two numbers to find a GCF. If that's 72 and 96, the GCF is 24.
The GCF of 10 and 15 is 5.