Question

A certain number is a multiple of 4. Which of the following MUST be a factor of this number? 16 ,8 ,6 ,2​

Answer 1

2

Explanation:

The factors of 4 are 1,2 and 4.

This means that whichever multiple of 4 we take, the numbers 1,2, and 4 should be dividing it.

Since 2 is the in the options, 2 is the answer.

Answer 2

Add 1 to above result, since the bound is inclusive.

Multiples of 4 are = 4*1,4*2,4*3,4*4,4*5,4*6,4*7,4*8, 4*9,4*10

=4,8,12,16,20,24,28,32,36,40, 8,16,24,32,40