An excellent brain training game that will come in really handy when you get into that middle school math that wants you to find the next number in the series! The player is given a sequence of different numbers that are in a certain order or are generated by a specific mathematical function for example plus eight each time. The player must figure out the series and enter in the next number. The player only has a certain amount of time to do this so try to be quick and earn points with the time bonus. The differences all have to do with either addition of subtraction.