You've all seen them at some point in time or another. The math-magical trick. The magician usually tells you to think of a number, then runs you through a sequence of adding, subtracting, multiplying, etc to come to an answer that they've already predicted. For example, we can try one right now. Pick any number you want. Go ahead. Now double it. Now add six. Good divide by two. Subtract your original number from that. Got it? Circle your answer. Now focus on your answer and ask your self How does he know I circled a three? Does this stuff ever really work though on an entertaining level? To me it just seems so flimsy. Does anyone have any experience working with mathmagic for real audiences that you can share?