# Find the least number which must be added to each of the following numbers so as to get a perfect square Also find the square root of the perfect square so obtained

We have

 22 2 5 25?4 42 1            25 ?             84 41

This shows that  222<525

. Next perfect square is  232=529

. Hence, the number to be added is 232−525=529−525=4

. Therefore, the perfect square so obtained is 525+4=529

. Hence,

.

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