AddsPyramid

In a pyramid, every brick is worth the sum of both bricks on which it is sitting.
You can also play with the pyramid upside down.
In this case every brick will be the sum of the two bricks it is supporting.

Complete each brick with the appropriate number.

The principle is very simple.
Select a pyramid based on the level of difficulty: easy, intermediary, advanced.
You have to fill in the empty bricks while respecting the rules described above.
This game can also be played as a challenge between different players of for you alone. You can time the duration in order to find the fastest player. You can use it for your kids, to review or refresh their mental calculation skills, but you can also use it for yourself and pick up the challenge of beating your own performance. You can check the result, view the solution if you are stucked, save a play in order to continue solving it later on.

The application is available in French, English, German.

So, ready, steady, go !