Just finished the test.

50 questions, 15 seconds to answer each question, no need to phrase responses in the form of a question. Some easy, some hard, ended up passing on about 5 or 6 of them. A couple of the harder ones I passed:

Karl Marx' co-author of "The Communist Manifesto" was _____ ?
An 18th Century Prussian king named _____ the Great.

Any ideas, before I look to Mr. Google?