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Math Help - four digit number aabb that's a square

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    four digit number aabb that's a square

    can we find a 4-digit number of the form aabb which is a square.
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  2. #2
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    Quote Originally Posted by Statsnoob2718 View Post
    can we find a 4-digit number of the form aabb which is a square.
    aabb = 11(100a+b). If that is a square then 100a+b must be divisible by 11, which implies that a+b = 11. Also, a square has to end in 0,1,4,5,6 or 9. That doesn't leave many possibilities for you to check ... .
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