[‘Engineer’, ‘Educator’, ‘Caffeinator’, ‘Affiliations: @intersection_co, @GA, @joinpursuit’].join(‘; ’).concat()
In a previous article, we reasoned about a method for somewhat quickly computing the squares of numbers.
In a previous article, we explored a trick for squaring numbers that end in — 5 really quickly.
So here’s a neat trick. What’s a quick way to square numbers that end in — 5 in your head?
For example, what is 25* 25? (Plug into a calculator real quick). We expect our trick to give us: 625.