For math lovers around the world, March 14 is a holiday, "Pi Day." That's because the date — 3/14 — is also the beginning of the decimal expansion of the world's best-known irrational number: ...

A former student of mine wrote to ask about π. Specifically, he wondered how, whenever someone announces they've calculated the first 100 billion digits or whatever (actually, the current record is 13 ...

This whole series of posts was motivated by a question from a former student of mine: whenever someone announces they've computed a bunch of digits of π, how do we know it's correct? As I pointed out ...

Would anyone like a slice of my π pie? Tarehna Wicker, CC BY-NC-SA Math students everywhere will be eating pies in class this week in celebration of what is known as Pi Day, the 14th day of the 3rd ...

Happy birthday, Einstein! But this is also Pi Day, and a very special Pi Day at that. Why so special? The date is 3/14/15, the first five digits in the ratio of the circumference of a circle to its ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Pi Day is celebrated every year on March 14—when the date can be ...

π has fascinated mathematicians, engineers and other people for centuries. It is a mathematical constant that is the ratio of a circle's circumference (C) to its diameter (d); This also explains ...

Some people can't remember a nine-digit Social Security number without a prompt; Siva Natarajan can recite hundreds of consecutive digits for π, the irrational number that never ends and never repeats ...

Oh dear—π day 2016 has gone by and I still haven’t memorized p in what I used to call the ‘‘elementary’’ way that I invented some decades ago. Somebody recently suggested the much better name ...