This is a mind game project developed for Android devices.

The game is played against Droid. Droid hold a 3-5 digit number in his/her mind and give you hints while you are making wild guesses.

Droid gives two numbers as hint. One is indicated as “+” and the other is “-“. The “+” indicates the number of digits known at the same place with the original number. The “-” indicates the number of digits known at the wrong place with the original number.

http://code.google.com/p/guessthenumber/