Question

which is a factor of 20 but not a multiple of 2

Answer 1

$20|2 \\ 10|2 \\ 5 \ |5 \\ 1 \\\\\boxed{ 5} \ it's \ a \ multiple \ of \ 20 , \ but \ it's \ not \ a \ multiple \ of \ 2$

Answer 2

5 and 1 because multiples of 2:2,4,10 those are also factors of 20.Factors of 20: 1, 2, 4, 5, 10