Question

A certain number is a multiple of 4. Which of the following MUST be a factor of this number?​

Answer 1

Explanation:

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….

Answer 2

$\bigstar \: \boxed{\sf{\color{purple}{Answer:}}}$

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

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Hope it's clear to you!

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