Crack the Code

Can you crack the unlock code for the lock using the 5 clues below?

crack the code

  • Clue #1: 682 – One number is correct and well placed
  • Clue #2: 614 – One number is correct but wrongly placed
  • Clue #3: 206 – Two numbers are correct but both are wrongly placed
  • Clue #4: 738 – None of the numbers are correct
  • Clue #5: 780 – One number is correct but wrongly placed

Answer

The code is 042.

Based on clue #1 and #2, we can say that 6 is not the correct number.

Now we know that the unlock code does not contain 6 and based on clue #3, we know that 2 and 0 are correct numbers but in the wrong position. From clue #1, 2‘s position should be on the right. The code is ??2.

Based on clue #5, 0‘s position should be on the left. The code is 0?2.

We have to find the missing number in the middle position. Based on clue #2, the middle number has to be 4. It cannot be 1, as the statement says that the number is wrongly placed.

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