Find the missing digit and collect the most completed pairs.
- Choose two to four players and which part of the calculation has a missing digit. Changing a setting starts a fresh game.
- Everyone works out the missing digit independently on paper. There is no timer. Choose Ready to match when everyone has had thinking time.
- The calculation at the top is already face up and forms the first card of the pair. The named player reveals one face-down digit card. If it is the missing digit, any player can collect the pair using their Claim digit button or key: Player 1 A, Player 2 L, Player 3 S, Player 4 K.
- A correct claim wins one pair and removes that digit card. A wrong claim wins nothing; the other players can still claim. You may claim only once on each reveal.
- If nobody claims the correct digit, choose Next reveal. The card turns face down and the next player reveals a card. Duplicate digits are separate cards; either matching card can be claimed.
- After a correct claim, read the completed calculation and check, then choose Next question. After all ten pairs, choose Show result.
- New game keeps the settings, clears scores and gives fresh questions. Curriculum links preload the lesson setup; New game keeps its division range. Share this setup shares only the player count and missing-digit focus.
Keyboard: use Tab and Enter or Space to operate cards and controls. Claim shortcuts are paused while this dialog is open.
