Questionnaire English

Hi, I'm writing to ask you to check the below sentences which are for a questionnaire for native English spekaers.

I have listed a few possibilities about each question, because I'm not sure which one is best (or most polite).

If there is anything wrong with them, please correct it.

Also, I'd like you to let me know which one is best in each question.

Thank you in advance.

Q1 Tell us your sex.
Q1 Choose your sex. (when two choices (1.Male, 2.Female) are given.)
Q1 Tell us your gender.
Q1 Choose your gender.

Q2 Tell us your age.
Q2 How old are you?
Q2 Fill in your age.

Q3 What state do you live in?
Q3 In what state do you live in?
Q3 Tell us your location.