There are 9.
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None, unless you count the boundaries ... 30 is an even whole number.
When rounding a number to the nearest whole number, you look at the digit immediately to the right of the decimal point. In this case, the number 30 is already a whole number, so it does not need to be rounded. Therefore, 30 rounded to the nearest whole number remains 30.
43 to the nearest whole number
30
No and yes. No because in some circumstances you have to have a whole number. And yes because it does divide into it because it comes out as a fraction.