Editor’s Note: Published in 1957, this article comes from Martin Gardner’s legendary Scientific American column Mathematical ... Consider the paradox of birthdays. What would you estimate ...

Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference ... people’s identities can be found in the pattern: like social security numbers ...

Friday is Pi Day, a national celebration of the mathematical concept ... like social security numbers or birthdays. This theory, which had circulated around Reddit for years before getting ...