No Sense

Okay, this is a magic trick, a mind magic trick. First pick any number, but a number 1-10 would be easier for you. Got it? Good. Now double your number (times is by two). Then add 10. Divide it by 2. Now take the number you started with and subtract it from the number you have right now. Your answer is 10 right? Right!

Here's how I did it. I simply just memorized a simple math formula. Then whatever number I told you to add divided by two is your answer! So if I told you to add 6 your answer would have been three. If I told you to add 8 your answer would have been four. Get it? Awsome. Now go try it on one of your friends. It's so much fun to see their faces when the go "How did you know that?". With an amazed face.