Question

Find the HCF of the numbes 10, 12 and 15.

• A. 4
• B. 3
• C. 2
• D. 1

Answer 1

The correct option is D 1

Factors of 10: 1, 2, 5 and 10
Factors of 12: 1, 2, 3, 4, 6 and 12
Factors of 15: 1, 3, 5 and 15

There is only one factor comon for all. Therefore, the HCF is 1.