sorry - but they are NOT allowed to ask ANYTHING about your age. There are a list of questions a potential employer cannot ask you - they are:
Race - They cannot ask you about your race - doesn't matter HOW they word it - NO! It IS illegal....An employer can, however, inquire as to whether an international applicant is legally authorized to work in the United States on a full-time basis.
Sexual preference. Doesn't affect your ability to do the job.
Planning on having babies??? None of their business.
Ever been to rehab? However, an employer CAN inquire into whether an applicant uses illegal drugs.
Been to the hospital lately? Again, None of their business.
do you have any sort of mental illness? Disability questions are off-limits, and a conversation concerning disabilities is illegal, unless prompted by the applicant.
Religion - even if you are applying to a church, they can't ask you this.
have you ever filed a workers' compensation claim?
How old are you? Unless the employer is trying to discern whether you are legally an adult.
That would kinda upset me if they asked that question. I would tell them to refer to my date of birth on my application.
GOOD LUCK!!