Question

What is greatest common factor of 36 and 90?

Answer 1

The gcf of 36 and 90 is 18.

Answer 2

List the factors of each number and find the highest common one:

36: 1, 2, 3, 4, 6, 9, 12, 18, 36

90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

The greatest common factor is 18