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Detective riddle

Detective Vance was investigating a forgery ring. He inspected three forged banknotes and noticed every single one of them had the exact same serial number. What did this tell him about the counterfeiters?

About this riddle

Detective riddles are tiny mysteries. Look for the detail in the story that does not fit; it is usually the clue that solves the case.

Difficulty: Easy. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.

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