a positive integer
The square root of 15 is not a whole number.
The square root of 26 is not a whole number
Negative the square root of 36 is -6, which is a whole number.
When the whole number is a perfect square, ie it is a whole number squared.
a positive integer
No. More frequently it is not.
No, it may be not even a rational number. Square root of 2 is 1,414213562... for example.
The square root of 16 is 4 which is a whole number.
Yes. The square of a whole number is always a whole number. For example, 3 squared is 9, so the square root of 9 is 3. What you never have, is the square root of a whole number being a fraction that is not a whole number. The square root of a whole number is either a whole number or an irrational number. For example, the square root of 2 is irrational, because there are no 2 whole numbers a and b such that a/b squared is 2. This is not terribly difficult to prove, but I have already said too much; I have answered your question.
The square root of 15 is not a whole number.
The whole number closest to the square root of 65 is 8. The whole number closest to the square root of 65 is 8.
The square root of 26 is not a whole number
A perfect square root is where the square root of a number equals another whole number. For example, the square root of 144 is 12. 12 is a whole number thus 144 is a perfect square root.
The square root of 55 to the nearest whole number is 7.
Negative the square root of 36 is -6, which is a whole number.
48 is not a square number, so the square root of 48 is irrational and can not be represented as a whole number.