Question

Using the common factor method, find the HCF of 24 and 40.

Options

• 4

• 8

• 12

• 16

Answer 1

8

Explanation: 

Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24.

Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40.

Common factors: 1, 2, 4, 8.

The highest is 8.