Question

What is the gcf of 16 and 72? a. 2 b. 4 c. 16 d. 8

Answer 1

Your answer is D. 8

16 = 2^4
72 = 2^3*3^2

So you'll choose 2^3 = 8

Answer 2

Factors of 16 = 2 * 8 
Factors of 72 = 9 * 8

In short, GCF Would be: 8 [Option D]

Hope this helps!