A letter is delivered blank but the envelope has writing on it. How was the message sent?
Category: Mystery · Difficulty: medium
Hint: Look where messages might be hidden besides paper
Answer
The message was written on the envelope
Explanation
Writing on the envelope itself can carry the message if the letter inside is blank.
This is a medium mystery riddle — a moderate challenge for most people. The answer is The message was written on the envelope.
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