I got them all, but it helped that I've taken a bunch of US President quizzes in the past couple days, since so many were reset. Under normal circumstances I probably would have found this one a lot more difficult.
You can click on the picture and it will take you to their wikipedia page but tt would be nice to have it listed to save time. I only missed Buchanan. Mixed him up with Polk.
Scoring
You scored 12/12 = 100%
24.7% of test takers also scored 100%
The average score is 10
Your high score is 12
Your fastest time is 0:38