This year's Pi Day Challenge uses Facebook - so you can compete against your friends and track your progress! Please note that if your network blocks access to Facebook, you can still play as a guest.

All Puzzles Now Available

All Puzzles (28 in total) are now available.

Playing as a Guest

If possible, we recommend connecting with Facebook to save your progress. If you play as a guest, make sure you do not refresh this page, otherwise you will lose your spot. If your network blocks Facebook, ask your administrator to unblock Facebook to celebrate Pi Day.