Question

What is the sum of the first 20 terms of multiple of 4?

Answer 1

840

Explanation:

The first 20 multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80.

Then you add all of these 20 numbers up getting 840.