It just gave me a brain age of........73!!! so, I blamed Mr Lore for distracting me etc etc.... then it said, Hold on, I've made a mistake. your brain age is 22.
I had the same thing today except he told me my brain age was 79 ! It was 21 yesterday and I thought I know I had been a bit slower on it today, but surely not that bad, then he said oh yeah, I've miscalculated your brain age it's really 33. I didn't find it very funny either :)