Math Rings is a very challenging mathematics game that also exercises problem solving and rationale thinking.
There are 16 cells surrounding a middle number in any given puzzle. The inner 8 cells contain mathematical symbols for addition, subtraction, multiplication and division. The outer 8 cells are numbers. The object of each puzzle is to arrange the symbols and numbers so that all mathematical equations through the center cell are solved correctly.
The puzzles are timed and a rating of 1-5 stars is used to show how well the problem solver did. Each puzzles starts with 1 as the common center number and go as high as 40. There is a lot of room for setting appropriate difficulty levels and more than enough puzzles to choose from and solve: 1000 in all.
Compatible with iPhone, iPod touch, and iPad.