DetectiveRiddle #1352
Someone licked the frosting off the cupcakes before Sophie's party.
Her brother says“I spent the whole hour blowing up balloons by mouth. By the time guests showed up, there were 30 of them floating up against the ceiling.”
What gave him away?
Hint: What's inside those balloons?
Answer
Balloons blown up by mouth don't float.
Balloons you blow up yourself are filled with breath, which is no lighter than the air around them, so they drift down. Only helium balloons float up to the ceiling.
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