This is a little fun game where you are flashed a few numbers in circles. Then you need to click the circles in order of smallest to the largest number once the number disappears from the circles. It will estimate your age. Memory Test I am 30 according to this.
I have that game (sort of). It's called Brain Age and Brain Age 2 on Nintendo DS/Lite. My brain age is 27.
for some reason, when i got to the more difficult levels, i would mix the 6 and the 9. the best i could get was age 20.