Enigma - The Math Puzzle

Enigma is the most popular mathematical puzzle in the world.
Known as the "Calculation Enigmatic" in numerous magazines is now available for iPhone and iPad with grid always different (random) and three level of difficulty.

How to play?
The grid is composed of a series of symbols and mathematical operators (+ - x : ) arranged in three rows and three columns;
Same symbol corresponds equal number.

Features
- 6 different symbols
- 3 difficulty levels
- Function "Show Correct Number"
- Function "Show Error"