Can you crack the unlock code for the lock using the 5 clues below?
- 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
The code is
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
0 are correct numbers but in the wrong position. From clue #1,
2‘s position should be on the right. The code is
Based on clue #5,
0‘s position should be on the left. The code is
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.