Digit
Door

How to play Digit Door

Each puzzle shows some guesses at a secret number, with marks beside them. A filled dot means a right digit in the right place. A ring means a right digit in the wrong place. No marks means none of those digits are in the code. Use the clues to work out the one number they all fit, then check it.

Digit Door is our own Mastermind-style code puzzle, a number version of the old pencil game bulls and cows. It starts with 2-digit codes and climbs to 4-digit codes, so it is great practice for logical thinking and place value. Like puzzles? Try Step Squares, Sign Hop or our maths games.