There are a number of ways of asking about age. You can ask respondents to select an age band. The most commonly used age bands for consultation with adults are 18-24, 25-34, 35-44, 45-54, 55-64 and 65 and over.
How do you ask age question on form?
One of the more common ways to present age brackets in a survey is to use a closed question, where respondents are asked to select their age from a range of age group categories, presented in a format similar to the following: What is your age group?