Am I old or am I not?

I can now officially cook Khmer food - I even have a certificate to prove it.

During the cookery class, the teacher asked me how old I was. So I told her, much to the amusement of the rest of the kitchen staff. I asked how old they thought I looked, and after a little conference they decided on "one hundred".

Later on, downstairs in the same restaurant, the waitress noticed the date of birth on my certificate, and on seeing the incredulous look on her face, I asked her how old she thought I was. She said "nineteen".