Escape RoomRiddle #1410
Three boxes sit on a shelf, and only one note on them is true. Box A: 'The key is in this box.' Box B: 'The key is not in this box.' Box C: 'The key is not in Box A.' Which box has the key?
Hint: Try putting the key in each box and count the true notes.
Answer
Box B
Key in A makes A's and B's notes true (two). Key in C makes B's and C's notes true (two). Key in B makes only C's note true, so the key is in Box B.
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