Question

What is that least number that must be added to the product 684×686 to make it a perfect square?

Answer 1

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Here is your answer
The product of 684× 686 is
= 469224
Now we find
$\sqrt{469224} \\ = 684.99$
It means 685 square is nearest to the number
square of 685 is 469225

So Least Number is added is
$469225 - 469224 \\ = 1$


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