Question

10. What least number must be added to 521 to make it a perfect square?
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Answer 1

Step-by-step explanation:

becomes=521+8=529, which is the perfect square of 23, hence,8 is the smallest number in this case.

Answer 2

For making 521 a perfect square, we have to add 8 on it as:

521 + 8 = 529

And we know that,

√529= 23

Hence 8 is the least number that must be added to 521 to make it a perfect square.