Secret Code Test

This Secret Code Test is a code-breaking challenge where you use clues from your previous guesses to work out a hidden number sequence. Tests like this are similar to the classic game Mastermind, which has been studied as an example of logical thinking and problem-solving. See research on Mastermind strategies .

After each guess, you receive clues showing which numbers are correct and whether they are in the right position. Use this information to remove incorrect possibilities and find the secret code.

The code becomes harder as you move through higher levels. Your score is based on how many levels you complete successfully in a row.

What Does Your Score Mean?

Your score is your longest successful streak. A higher streak means you were able to solve more secret codes one after another.

Since this is a custom online code-breaking test, there is no fixed worldwide average score or official percentile system. Your result is most useful when you compare it with your own scores from other attempts.

What Can Affect Your Result?

• Strategy: Using previous clues carefully can help you find the code with fewer guesses.
• Memory: You need to remember information from earlier guesses and clues.
• Attention: Distractions can make it easier to miss or misunderstand a clue.
• Practice: Learning how the test works can help you develop a better code-breaking strategy.