Like math? Like puzzles? Then meet Bojagi, a game created by David Radcliffe (@daveinstpaul). It looks simple enough. A grid has a few numbers in it. The goal is to draw a rectangle around each number ...

Add Yahoo as a preferred source to see more of our stories on Google. We like to think that we're pretty good at math, especially after years of schooling. But every once in a while, a simple ...

A long-standing puzzle seems to constrain how addition and multiplication relate to each other. A graduate student has gone further than anyone else in establishing the connection. In 1983 the ...