Question

Find four consecutive multiples of 5 whose sum is 90

Answer 1

The answer is 15, 20, 25, and 30

We know that you need to have a multiple of 5. The sum is 90. First divide 90 by something. Let's start with 15. It is a multiple of 5. You can divide by 90. Now do the same thing again. Then, eventually, you would get 15, 20, 25, and 30 is the answer.

Answer 2

15, 20, 25, 30

Explanation:

If want to find the first multiple, we could actually use the equation: x + (x+5) + (x+5+5) + (x+5+5+5) = 90. After simplifying this term, we would get 4x+30 = 90 which then transforms into 4x=60 which simplifys to x = 15. Plug 15 into the original equation, and you would get the multiples 15 + 20 + 25 + 30 = 90.