2009 Category

2009: Problem 25

Solution: D

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2009: Problem 24

Solution: C

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2009: Problem 23

Solution: D

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2009: Problems 21-22

Solution: D Solution: A

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2009: Problem 20

Solution: C

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2009: Problem 19

Solution: B

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2009: Problem 18

Solution: E

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2009: Problem 17

Solution: D

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2009: Problem 16

Solution: B

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2009: Problem 15

Solution: C

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