Problem
On the board it is written: . Replace the asterisk with a digit so that the resulting number is divisible by .
0/3 solutions found
You can try answers here without an account—progress is saved in this browser only. Sign in to sync results across devices, keep paper progress, and unlock official solutions.
One puzzle per day. Cryptarithm, Magic Square, Summit. No sign-up required to play.
Play daily puzzle →Interactive problems and curated lessons—water pouring, magic squares, knight's tour, and more.
Browse library →See how you rank. Top solvers by problems solved correctly. Sign in to climb the ranks.
View leaderboard →