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The Lost Key - A Mystery with Whole Numbers
Melinda Thielbar
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The Hundred-Dollar Robber - A Mystery with Money
Melinda Thielbar
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The Secret Ghost - A Mystery with Distance and Measurement
Melinda Thielbar
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The Kung Fu Puzzle - A Mystery with Time and Temperature
Melinda Thielbar
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The Ancient Formula - A Mystery with Fractions
Melinda Thielbar
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The Fishy Fountain - A Mystery with Multiplication and Division
Melinda Thielbar
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The Book Bandit - A Mystery with Geometry
Melinda Thielbar
