The NumberThumper game is a multi-user, online game where the skill of players to do mental arithmetic fast can be tested to the limit.

The biggest number is 9, and any number from 0 to 9 must be form through addition, subtraction, multiplication or division from the numbers available on the board at any time. If the numbers on the board are not sufficient a new number can be added, but then it is also a strategic decision of where to place this number, as it can be used later to again form a new number.

As a result of more than one player that could be busy on the board at the same time, the numbers can also be used by someone else, and this is then the reason why the speed of the mental arithmetic can be a deciding factor in the score!

Click here to go to the board