Can you crack the code? Using 4 unique digits, 24 numbers are possible. You will be given 23 numbers. Your mission is to find the missing 24th number. When you think you figured it out, click the Crack Code button, enter your 4 digit code, and test it. If you need help keeping track of your numbers, you can click on any cell to turn it on or off. The Leaderboard tracks the top 10 times. Good luck!