BRAIN TRIVIA
Code breakers: find the correct 4-digit combination using the numbers 1-9, with no repeats:
3 9 4 7 - 1 digit is correct and in the correct position
5 1 6 8 - 3 digits are correct but all in the wrong positions
7 2 5 9 - None of the digits are correct
2 8 9 4 - 1 digit is correct and in the correct position
Explanation:
Code breakers: find the correct 4-digit combination using the numbers 1-9, with no repeats:
3 9 4 7 - 1 digit is correct and in the correct position
5 1 6 8 - 3 digits are correct but all in the wrong positions
7 2 5 9 - None of the digits are correct
2 8 9 4 - 1 digit is correct and in the correct position
From clue 3, you can remove those numbers from all of the other clues. This leaves us with:
3
947- 1 digit is correct and in the correct position51 6 8 - 3 digits are correct but all in the wrong positions7 2 5 9- None of the digits are correct2894 - 1 digit is correct and in the correct position
From clue 2, we know 1, 6, and 8 are all in the code.
From clue 4, because 8 is in the code (from clue 2), 4 can’t be. That means 8 must be in its correct spot. The second digit is 8.
From clue 1, since 4 isn’t in the code, 3 must be correct and in the right spot. So the first digit is 3.
That leaves 1 and 6 for the last two spots. From clue 2, 6 can’t be in the third spot, so 6 is the last digit and 1 is the third digit. 🔓
Solution:
3 8 1 6