Question

What is the greatest common factor (GCF) of 84 and 96?
A. 12
B. 32
C. 21
D. 6

Answer 1

A. 12 :)

Answer 2

To find the GCF, you take only common factors with the smaller exponent. Then multiply them together.
From 2^2 and 2^5, use 2^2.
From 3 and 3, use 3.
From 7, do not take any since it's not a common factor.
GCF = 2^2 * 3 = 4 * 3 = 12