Common Difference Resources


Say we were tasked to find the sum of the series from 51 through 375 of a series whose values are all separated by a common difference of six. That's a difference of 324 so it would take 324 hops if the hops were each one in size, but the hops are six times bigger than that so it takes six times fewer hops. 324/6 = (300+24)/6 = 50 + 4 = 54.   So note that there are 55 numbers... read more