Come spring, everyone's a joker about math. That's because every March 14 — 3.14, that is — is Pi Day, so named for the set of numerals that make up its date. Sure, pi is technically the ratio of the ...

If you haven’t celebrated Pi Day yet, what are you waiting for? This unofficial holiday rolls around every March 14 — that’s 3/14, matching the rounded number of pi. In case you need a refresher, pi ...

Add Yahoo as a preferred source to see more of our stories on Google. As if math wasn't confusing enough, we have Pi to contend with. An irrational number that has no end. It sounds like an easy ...