Question

Name 3 pairs of numbers that have 5 as their greatest common factor (gcf). Use each number only once in your answer.

Answer 1

how about 15 and 20?

Answer 2

or 35 and 40?

Answer 3

is that okay?

Answer 4

multiply 5 by something like say 11
then multiply it by another number, say 10
you will get two numbers whose greatest common factor is 5