I found it a pretty challenging test; I scored 13 out of 15, giving me 86%. Some really good questions, I thought; "They really expect their readers to be well-versed in Presidential trivia!", I even said to myself half-way through. Boy, was I naive.
When I was done, I looked around the site to see if there might be similar history tests I could take. (There are) I quickly noticed a link to an article called "Presidential Portraits", which I was supposed to go through first, evidently, because the biographies of the Presidents listed there GIVE ALL THE ANSWERS to the US Presidents test.
Sheesh! What a letdown. I guess it's meant to be a test of one's reading comprehension more than one's basic historical knowledge.