Student or Learner
Is it correct to say like these?
1. How much do you weigh?
2. What is your weight?
3. You should be careful about how much you eat.
4. You should be careful about how much you weigh.
5. You should be careful about what you weigh.
All are correct in their own way, but to be used only in the right context - say in a doctor's surgery by the nurse or doctor.