Famous cars (37 out of 45 tv and movie cars, they are either easy or impossible ... which of the Back to the Future movies? Really? And the Cuda is a 71, not a 70)
Car advertising slogans
Car identification by taillight (I got 28 of 35, huge range, from 60's sports cars to new Hondas and Toyotas)
Car company emblem identification (I got 44 out of 50)
It's a little slow because of the one question per web page, next page for the answer, next page for the second question format... but hell, I didn't want to make a test like this! Time consuming to photograph 50 car manufacturers logos, crop them, photoshop out the name FORD for example, then post them and the answers, and grade it...