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4 digit number 12*6 is a perfect square.the value of the digit represented by * is ?

  • math -

    Just put in some number

    e.g. 1256
    √1256 = appr 35.44

    but we know that it must end in a 6, so it has to be 36
    36^2 = 1296

    so the missing number is a 9

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