The sets of numbers to which –10 belongs is:
Natural  numbers--
It is the set of all the counting numbers i.e. it the number of the type:
1,2,3,....
Whole numbers--
It is the set of all the natural numbers including zero.
i.e. the set is:
0,1,2,3,....
Integers--
It is the set of all positive and negative whole numbers i.e. the set is:
 .......,-4,-3,-2,-1,0,1,2,3,4,.......
Rational numbers--
The number which could be written in the form of p/q where p belongs to integers and q belongs to integers except zero.
i.e. integers, natural numbers and whole numbers all come in the category of rational numbers.
The number is given by:
           -10
This is a integer and hence is a rational number.
