I think the 1 and 7 looked similar for a reason -- to try to trip you up. I know I hit the right-arrow key a couple of times when the 1 flashed up, since I was trying to be really fast. Apparently it didn't hurt my results any; I can't believe my brain is the youngest here!

But, as some of you point out, I'm not sure that is always a good thing. Youngsters are immature, impulsive and often make ill-thought-out decisions! Hmmm, that couldn't possibly be me!

Obviously this test is measuring something (reaction time & visual perception, I'd guess), but just a small factor in "brain age". Still, it was kinda of fun.

Emily