# The Flash Mind Reader

**12/24/05**

Check http://trunks.secondfoundation.org/files/psychic.swf out.

This trick is somewhat simpler than the previous number trick I explained. I'll explain how this one works.

Your original number can be written as 10a+b. Subtracting the sum of its digits (which is a+b) gives

Note that this is always a multiple of 9.

Observe that the images coresponding to multiples of 9 are all the same (with the exceptions of 90 and 99 because you can't get to these numbers because a is a single digit; it can't be 10 or 11).

Other numbers have this image too, and the images change each time, both things to make it appear more mysterious. The images also disappear at the end so one can't solve the mystery as easily.

If you enjoyed *any* of my content, please consider supporting it in a variety of ways:

- Email news@statisticool.com to sign up to receive news and updates
- Donate any amount via PayPal
- Take my Five Poem Challenge
- Buy ad space on Statisticool.com
- Buy what you need on Amazon using my affiliate link
- Follow me on Twitter here