3 - Finding The Sum of All Odd Numbers Starting From 1

Rule: Square the amount of numbers in the series.

To show this, the sum of all numbers from 1 to 100 will be calculated. There are 50 odd numbers in this group. Therefore

50 x 50 = 2, 500 Anstver

This is the sum of all odd numbers from 1 to 100. As a check, we can compare this answer with the answers found in Short Cuts 2 and 4.