Scratch your head over these puzzle questions, all of which are based on real-world science. As you answer the question, you'll be learning how to do everything from turning water into wine to cracking safes, and how to build a time machine!

Baffle your friends with these factual conundrums - from how two equidistant cities can be separated by different distances, to how to pot every ball in pool without fail - in over 100 different puzzles.