Before a sim check I was tipped off about the age in months question, so the night before I worked out my age in months, my mother's age in months, my girlfriend's, my sister's and my grandmother's, and memorised them.
Next day, half way through a steep turn;
Instructor: Do you have a girlfriend?
Me: yes (ha ha i'm so clever)
Instructor: How old is she?
Me: 24 (these sim checks are a doddle)
Instructor: Oh right...................................what's the square root of 423?
