Mathematically, there are as many dimensions as you need (i.e., there are infinite dimensions available). Physically, the number of dimensions is a matter of considerable debate.
I believe that mathematically there are 11 dimensions.
10 doesn't quite work, but 11 does.
Mathematically, there are as many dimensions as you need (i.e., there are infinite dimensions available). Physically, the number of dimensions is a matter of considerable debate.