Question

What is the greatest common factor of 42, 49, and 21?

Answer 1

Answer:

7

Explain:

7 x 1 = 7

7 x 2 = 14

7 x 3 = 21

7 x 4 = 28

7 x 5 = 35

7 x 6 = 42

7 x 7 = 49

So it's 7!