Quote from quick kicksi cant tell who is a man and who is a women
Its really simple. Ask them a question, any question.
If its a man, you'll get an answer in the form of an answer. If its a woman, you'll get an answer in the form of a question.
Example:
You: Excuse me, do you know how far Time Square is from here?
Man : Fifteen minutes.
Woman : Why are you going to Time Square?