Question

What is the common factor of 49 and 50?

Answer 1

The factors of 49 are: 1, 7 and 49.
The factors of 50 are: 1, 2, 5, 10, 25 and 50.

The common factor is 1.

Answer 2

$49|7\\ 7 \ |7 \\ 1 \\ \\ 49=7^2 \\ \\ 50|2\\25|5\\5\ |5 \\1\\\\50=2*5^2 \\ \\ G.C.F(49;50)=2450$