Adder - The Rules

This game helps you improve your math additions skills! The purpose of the game is to clear the board. If the board becomes full, the game is lost. At each step, the current digit is placed on the board in a free spot indicated by you. If the sum of the digits in the neighboring squares adds up (modulo 10) to the current digit, then the digit and its neighbors are cleared from the board. Good luck.



Start a new game

Other online games

Try other Goobix games, sorted by their popularity:

1. Nonograms
Discover hidden pictures based on digit clues.

2. Sudoku
Fill out with digits a 9x9 board, with restrictions.

3. Word Box
Find all the words inside a box filled with letters.

4. Lights Off
Try to turn off the lights in every place.

5. Word Twister
Form all possible words with the given letters.

6. Futoshiki
Fill a board by respecting inequalities.