Think of a number

This very old trick still works. I first know of this during my 2nd year in high school. It was an oral exercise in our algebra class. It goes like this:

1. Think of a number.
2. Multiply the number with 6.
3. Add 10 to the result in #2.
4. Divide the result in #3 by 2.
5. Add 4 to the result in #4.
6. Divide the result in #5 by 3.
7. Subtract your original number from the result in #6.
8. What you will get is 3 in the end.

For people who have a good grasp of algebra, this is not a trick at all. But for those people who are ignorant of algebra (many people can solve algebraic equations even without really having an idea of what algebra really is all about), this trick excites them and makes them wonder how you guessed at the final result without even knowing the number that they are thinking.

I will not explain the trick here. It's for you to discover. For your questions, you can email me at kgargar at yahoo.