I received a suggestion from a friend that I take this quiz.
I took it and found it amusing as it gave my age as 30.
I passed it on to some friends and one particular exchange between me and a much younger friend is reproduced below.
MG: How could one know how to act their age, if they have never been that age before?
Me: You are a rare specimen. I always get age much lower than my current one in such quizzes.