Question

Using the common factor method, find the HCF of 18, 27 and 36.

Answer 1

Factors of 18= 1, 2, 3, 6, 9 and 18
Factors of 27= 1, 3, 9 and 27
Factors of 36= 1, 2, 3, 4, 6, 9, 12, 18 and 36
Common Factors=1, 3 and 9
$\Rightarrow$ Required HCF= 9