What is the Highest Common Factor of 16 and 40?

8

Step-by-step explanation:

First you have to list out what the factors are, then which ever number is common and have the same factor that is the answer.

So look ...

16=1,2,4,8,16

40=1,2,4,5,8,10,20,40

8 is in both and that is the greatest factor.

8 is the highest or greatest common factor of 16 and 40

8*2 = 16

8*5=40