Question

What is the greatest common factor of 64 and 88?

• A. 16
• B. 8
• C. 12
• D. 11

Answer 1

The correct option is B 8

Step 1: Let's find the prime factors of 64 and 88 using ladder method


Prime factors of 64: 64 = 2 $\times$ 2 $\times$ 2 $\times$ 2 $\times$ 2 $\times$ 2
Prime factors of 88= 2 $\times$ 2$\times$ 2 $\times$ 11

$\therefore$ The greatest common factor of 64 and 88 is 2 $\times$ 2 $\times$ 2 = 8