Question

What is the greatest common factor of 18, 24, and 40?

2

3

4

8

Answer 1

(a) 2

Explanation:

You want the greatest common factor of 18, 24, 40.

Factors

The prime factorization of these numbers is ...

• 18 = 2 · 3²
• 24 = 2³ · 3
• 40 = 2³ · 5

The only common factor is 2.

2 is the greatest common factor of 18, 24, and 40.