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9 x 9 square

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Daij | 21:25 Mon 26th Dec 2011 | Quizzes & Puzzles
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If you draw a nine by nine square, thus giving yourself eight one small squares in total; how many rectangles can you count in total?
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Avatar Image Baldric
Just a guess, 285
21:34 Mon 26th Dec 2011
Avatar Image Prudie
That'll take ages to do
You'll need to count all the 1x2 up to 1x9 hozontal and vertical,
2x3 ditto up to 2x9
etc etc remembering lots will overlap each other
For example there are 36 in the top line alone (I think, accepting it is Boxing Day)
21:37 Mon 26th Dec 2011

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9 x 9 square

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