What you’ll get is a pretty good estimate of the irrational number pi (3.14159...). To celebrate Pi Day this year, here are three ways to estimate pi using random chance that you can try out at home.

Coin flips may seem random, but the outcome is governed by predetermined forces like gravity and the strength of your finger flick. So physics formulas could be used to calculate how a coin will land.

Research from the University of Sydney has found people tend to discriminate in favor of individuals who show a similarity to them, even when the similarity arises from a random event like the flip of ...