Sometimes the square root of a positive number can be irrational, as in the square root of 2 (which is a non-perfect square number), but sometimes it is a rational number, as in the square root of 25 (which is a perfect square number).
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Irrational. The square root of a positive integer is either an integer, or an irrational number.
The square root of 27 is an irrational number
The square root of 61 is an irrational number
It is irrational. * The square root of any positive integer, except of a perfect square, is irrational. * The product of an irrational number and a rational number (except zero) is irrational.
No. The square root of a positive integer can only be an integer, or an irrational number.