Mathematicians and math fans world wide celebrate "pi" day on 3.14.
3.14 is the accepted estimate of pi, or the value of the ratio of a circle's circumference to its diameter.
I thought I would share these 15 fantastic math problems involving pi with you.
You should know, some of these are fun problems NASA employees use to stump their friends. (That's gotta be a fun party.)
Oh, and I got one correct and was close on a second out of the 15. Good luck.