Mathematics

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A0786-Trigonometry Board 

Taken: Jun 19, 2008

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A1107-Pythagoras' Theorem 

Taken: Jun 19, 2008

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A1896-Demonstration Clock 

Taken: Mar 4, 2009

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A2208-Plane in 3D Object 

Taken: Oct 6, 2009

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A2886-Balance simple 200g, 1g 

Taken: Oct 21, 2008

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A2894-Geometrical set folding type 

Taken: Oct 13, 2008

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A3092-Hanoi Tower 

Taken: Jan 18, 2010

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