Only way
Number Theory
Level
2
What is the smallest positive integer such that is a perfect square?
The answer is 3.
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1 solution
If n=1 then 5 is not a perfect square. If n=2 then 31 is not a perfect square. If n=3 then 121 is a perfect square. Therefore, n=3. Plus, if n=0--- well, the problem says POSITIVE INTEGER so 0 is incorrect.