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Quick puzzle

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SXR103 chemistry is fun (2008) :-)

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6

SXR103 chemistry is fun (2008) :-)

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RHS can be shown as a 3,4,5 right angle triangle, so 3 (from rectangle)+3 (from triangle) = 6.

Jan

Richard Walker

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Rather neat though, the 3, 4, 5, 6 trapezium.