Tic-Tac-Toe game that can help to learn multiplication table
The goal of the game is to put three X or O in a row. By winning in small area you can put bit mark on whole area. Player who puts three big Xs or Os in a row - wins.
To put a mark you need to select two numbers. For example 2 and 5. Then you can put your mark on all cells with number 10. Because 2 times 5 is 10.
Second player can replace one of the number with some different number. For example by clicking on 5 and then clicking on 2. We'll get 2 times 2 is 4. So all cells with 4 on them could be marked at the same time. Each player can change only one of two selected multiplier.