Leaflet.org

Ok, this post falls into the "I’ll never actually use this again" category, which frankly, my normal readers know happens all the time, but it was a fun little diversion and a reminder of why I used to love math so much. Yesterday I found out that one of my kids’ homework was to look at a set of numbers and determine if they were abundant, deficient, or perfect. Right now you are probably (at least I know I was) asking, "what in the actual heck is that???" A quick bit of Googling turned up this explainer that basically boils it down to a simple principal. Given a number, find all the divisors of that number, excluding the number itself, and add them up. If the... more →