Question

which number is a multiple of 8 and a factor of 32

Answer 1

Lets name them below.

Multiples of 8:  8, 16, 24, 32 

Factors of 32:  2, 4, 16

We see that 16 is in both of those categories, therefore, that can be a possible answer.

Final answer: 16

Answer 2

Factors of 32: 1, 2, 4, 8, 16, 32
Multiples of 8: 8, 16, 24, 32, 40, ...

The numbers that are multiples of 8 and factors of 32 are 8, 16, and 32.