The BBC has a great site about the Human Body & Mind. I found it a lot of fun to complete two different tests: (1) Brain Sex and (2) Face Memory. As you likely know, both men and women are considered to be intelligent, yet they think differently. "The reasons for these brain sex differences, if they exist, are not known, though there are a number of theories that offer possible explanations." The Brain Sex test will score you against the average men and women and relate it to generalities about each sex.
The Face Memory test is part of information on Sleep. "Are you too tired to remember? 'Executive skills' such as memory are the first to go when you're tired. See how you score." Also included is a sleep quiz on"the top ten most fascinating and weird sleep facts."
I found each of the tests to be easy to complete and without much surprise. For example my right-side of the brain is more dominant. "Some studies theorise that as a right brain dominant person, you may excel in visual, spatial and intuitive processes." I also confirmed that I have a more difficulty expressing myself, and I speak less than my female friends.