Are you good at numbers? See if you can crack the algorithm behind wrong calculations. You get to play 3 levels - Kids, Teenagers and Grown Ups. Each level has limited number of chances to use numbers and operations (+ - * /) to reach the target. Remember, you cant trust the calculations. So 1+1 isnt 2 anymore. Crack the algorithm and see if you can hit the target before you run out of number of chances.