Here are a few logical pattern-based puzzles that I have come across recently. I'll provide four of them here (you can click on the images to load them up in larger size). Each puzzle is multiple choice, and so 5 possible answers are provided. I was able to figure out the first two. But, the other two, I'm really unsure about despite having some ideas on how they work. So, if you can explain the last two, please let me know. Have fun.