Escape RoomRiddle #1283
A three-digit lock comes with these clues. The digits add up to 18. The middle digit is the sum of the other two, and the first digit is twice the last digit. What's the code?
Hint: If the middle equals the other two combined, it's half of 18.
Answer
693
The middle digit is half of 18, so 9. The other two add to 9 and the first is twice the last, so they're 6 and 3.
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