Has your natural "doctor" received a degree in medicine or a postgraduate doctorate? If not, then no. The title Doctor is given to those who have completed sanctioned degree courses that are approved to award certain titles.
Yes a real number is a natural since real is natural so anything real is natural and so a real number is natural.
Yes, all natural numbers are real numbers. Natural numbers are a subset of real numbers, so not all real numbers are natural numbers.
The actor who plays the 10th Doctor's real name is David Tennant. However, if you mean what is the name of the Doctor himself, nobody knows his actual name.
No it's not real.
Yes. That's where the doctor is from.
The prime number of 11 is a real and natural number
The real name of the actor who played the Master in Doctor Who was Roger Delgado.
No. Natural numbers are a proper subset of real numbers.
Natural number are a special kind of real number. They both are large without bounds. For every real number there is a larger natural number and for every natural number there is a larger real number.
No, Bill Cosby is not a doctor. He is an entertainer, an actor.
Real
No because natural numbers are a subset of real numbers