Fun Maths Game?!!

[Stan-Hardy]

Hi i used to have a Maths computer game aimed at children, where you play as a green crocodile type creature trying to save his friends who get taken away by the police at the start of the game.

You play through a series of mazes to get through the levels and to open up the next level you have to work out the maths sum! You have to avoid the Police and their dogs etc. Please can somebody help me remember this game?