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24 February, 08:53

Explain why 90 is not a square number

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  1. 24 February, 09:17
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    90 is not a square number because you cannot multiple two of the same number to get 90.

    For example, 4 is a square number, because 2 x2 = 4

    Likewise, 9 is a square number (3 x3), and 81 is a square number (9 x 9)
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