Question

You have a combination lock with 3 secret digits. Find the 3 correct digits using the following clues

Answer 1

987

Explanation:

Clue 4: There is no 2, 4, 5.

Clues 1 & 2: There is no 1.

7 must be on the right.

_ _ 7

Clue 5: 9 is in the first or second place

9 _ 7 or _ 9 7

937 or 987 or 397 or 897

Try all 4 possibilities above through all 5 clues.

Only 987 works.

Answer: 987