by: B&L • 11
The application generates a 4-digit secret number. The digits must be all different. You will try to guess the secret number. If the matching digits are on their right positions, they are "A", if on different positions, they are "B".
UPGRADE: Higher degree of difficulty, records available for competition among buddies.
Tags: screenshot hidden , secret numbers , the secret number of , secret number , what is secret numbers , hidden numbers *# , hidden numbers