A math based game. The aim is to calculate the nearest number to the target number with given six tools. When you started, the random 'target number' will be given on the top of screen. There are also six other numbers which called 'tools'. The operators are plus (+), minus (-), multiply (x) and divide (/). The tools can be used for one time. But when you used two tools with an operator, you will get another tool. You have 60 seconds for finding the target.