Earned on 31 Aug 2012 for solving Problem 149. Is my wife right?.

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Solve all the problems in CUP Challenge problem group.

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Solve a problem with a best solution.

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Solve all the problems in Tiles Challenge problem group.

Solve all the problems in ASEE Challenge problem group.

Solve all the problems in Cody Challenge problem group.

Create 10 problems.

Solve 500 problems.

Solve all the problems in Modeling and Simulation Challenge problem group.

Solve all the problems in Magic Numbers problem group.

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Solve all the problems in Matrix Manipulation I problem group.

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Solve all the problems in Indexing II problem group.

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Solve all the problems in Computation Geometry I problem group.

Solve all the problems in R2016b Feature Challenge problem group.

Solve all the problems in Strings I problem group.

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Solve all the problems in Sequences & Series II problem group.

Solve all the problems in Sequences & Series I problem group.

Solve all the problems in Card Games problem group.

Solve all the problems in Computational Geometry II problem group.

Solve all the problems in Matrix Manipulation III problem group.

Solve all the problems in Strings II problem group.

Solve all the problems in Computational Geometry III problem group.