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BrainTwister #120: Wrong method, right answer
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BrainTwister #116: Curiouser and curiouser
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BrainTwister #112: Pronic numbers
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BrainTwister #109: Around the block
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BrainTwister #101: Knight’s progress
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BrainTwister #95: Coin roll
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BrainTwister #78: One on top
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BrainTwister #78: One on top
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BrainTwister #49: Squares and cubes
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BrainTwister #29: Four by four
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Puzzle #176: When did the ant stop walking around the clock?
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Puzzle #165: Can you calculate the area of land for rent?
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