Question

What is the gcf of 65 and 40

Answer 1

5

Explanation:

Express the numbers as a product of their prime factors

65 = 5 × 13

40 = 2³ × 5

The common factor is 5, thus

GCF = 5

Answer 2

Explanation:

65: 1,5,13,65

40:1,2,4,5,8,10,20,40

GCF: 5