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

so 3 pairs of nr. with gcf. the 5 

1. 5 and 10 what are 5*1 and 5*2
2. 15 and 20  --- 5*3 and 5*4
3. 25 and 30 --- 5*5 and 5*6 

hope helped 

Answer 2

The greatest common factor of two variables or numbers can be determined by listing all of the factors of the two numbers and then determining which is the greatest among all. In this case, one pair can be 10 and 15, 20 and 25, and 35 and 45.