we turn coffee into puzzles

Pi Day 2008

What is Pi Day?

Pi Day is a celebration of the number π that occurs every March 14 (3.14...). Math geeks all over the world celebrate their math-geekiness on this day with pie-eating contests, recitations of the digits of pi, and occasionally fundraisers where math faculty get hit in the face with pies. At Brainfreeze Puzzles we celebrate Pi Day - how else? - with a Sudoku puzzle.

Free Pi Day Sudoku puzzle

Our Pi Day Sudoku puzzle is free to use and distribute. You can download the printable PDF version and use it however you see fit.

Rules: Each row, column, and jigsaw region must contain exactly the first twelve digits of pi, including repeats: 3.14159265358. Notice that each region will contain two 1's, two 3's, three 5's, and no 7's. This puzzle is the most fun you'll ever have memorizing the first twelve digits of π !

2008 Pi Day Sudoku Contest

This contest ended on April 18, 2008.

We Have A Winner!

Congratulations to S. Huffman of Nine Mile Falls, WA, whose correct entry has won her a free autographed copy of our book COLOR SUDOKU!

A big "Thank You" to all who entered. The list of correct entries is here, and the solution is here.