Question

Find the highest common factor of 32 and 80

Answer 1

16

Explanation:

The factors of 32 are: 1, 2, 4, 8, 16, 32

The factors of 80 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Then the greatest common factor is 16.

Answer 2

`32 |2 \\16|2\\8 \ |2 \\ 4 \ |2 \\ 2 \ |2 \\ 1 \\\\ 32=2^5 \\\\ 80|2\\40|2\\20|2\\10|2\\ 5 \ |5\\1\\\\80=2^4*5 \\\\ H.C.F(32;80)=2^4=16`