Foritensum

I've always been a bit of a puzzle fan, so IQ tests are usually fun things to do. The hardest and most intriguing IQ test I have come across is Foritensum, which attempts to make the test "culture fair". In other words "an alien from a different planet should have the same chance to score well as someone raised and living in the western world."
I've solved several of the problems, but some are still making me ponder.