Find the least number that should be added to make 15871 a
perfect square.
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The way you solve these questions is to find the square root of the number in question, and the round that number up to the next whole number, then square it, and subtract your original number. In this case, using a calculator The square root of 15370 is 123.9758. You only really need to know that it is more than 123, and less than 124. So then round it up to 124. 124 squared is 15376. The difference is 6.
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