I got an 83% on master vs. ape (missed the first one) - even if the masterpieces aren't really masterpieces there's definetly tells in them - any painting with lines in them is likely to be have done by humans.

On masterpiece vs. author of the website I got 100%. Here you use the purpose of the website to help you. Obviosuly the author of the website thinks modern art is crap so his pieces are likely to have a parody/imitation like quality to them - i.e. they're kitsch. It's also good to think about it in the following way "how would an anti-modern art person answer these questions" and then completly reverse your answers.

On famous vs. unknown I got a 92%, missing Pisarro whom I never much cared for anyway. The 'unknowns' by Churchill and Hitler were just a bit too polished or looked like postcards one can buy in goofy tourist stores. And then you do go by "do I like it?", assume that you have good taste, which of course I do, and answer truthfully.

It ain't hard.