Great and addictive mathematical challenge that will test your logic. You must place the numbers to rest at the appropriate point, in order that they get zero.
Save the moon from the UFOs attack, you have to be fast with your keyboard. The UFOs have a word written on them, you have to use your keyboard to write it and destroy it!
The Earth is in danger and there is only one way to save her: with math. Show everything learned and resolve the mathematical computations to save the planet from Aliens. Use your mouse.