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The numbers $24^2 = 576$ and $56^2 = 3136$ are examples of perfect squares that have a units digits of $6.$
If the units digit of a perfect square is $5,$ then what are the possible values of the tens digit?

 Oct 29, 2024
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The numbers $24^2 = 576$ and $56^2 = 3136$ are examples of perfect squares that have a units digits of $6.$
If the units digit of a perfect square is $5,$ then what are the possible values of the tens digit?
    

 

The tens digit will always be 2.  Take any number that ends with 5 and square it.  The square will end with 25.  Always.    

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 Oct 31, 2024

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