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.

The pyramids are randomly generated. You can set the level of difficulty by deciding the maximum number in the base row.

You have to fill in the empty bricks while respecting the rules described above.
You can save infinite series of sets of 8 tests and their solutions as A4 formatted pictures, send them to friends by email, print them.
You can also check your result, view the solution, etc..

The application is available in French, English and German.

So, ready, steady, play !