65 is an integer. If you meant 6.5, then it rounds to 7. If you meant 0.65, it rounds to 1.
-65
It is 18 or 20
You can't write a non-integer as an integer. You can round it to the closest integer if you like, but it's not exactly the same number.
12
You would round it to 25.
-65
321 is an integer, so the closest integer would be 321. (If 321 itself doesn't count, 322 and 320 are the same distance from it, and are the next closest.)
No - 0.8 is a decimal number, not an integer. The closest integer is 1.
8 is an integer, so the answer is 8
-65
The whole number closest to the square root of 65 is 8. The whole number closest to the square root of 65 is 8.
65 is an integer and there is no sensible way to express it as a fraction.
It is 18 or 20
An integer is a whole number so the answer is 4.
65 is an integer and not a fraction. However, it can be expressed in rational form as 65/1 which cannot be simplified.
You can't write a non-integer as an integer. You can round it to the closest integer if you like, but it's not exactly the same number.
-132