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Ok well, a friend emailed this too me, I can not explain how this works, its pretty amazing, at 1st I thought it was some amazing algorithm, but there are just too many possible varitions of the answer, its pretty cool. See for your self!

Here is the link.

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

Read the instructions, its quite simple, pick and 2 digit number, ad those two together and then subract it from the number you selected, once you have the new total look up that symbol on the chart and click.

be amazed!

If you want to live with your amazement and don't want your illusion be spoiled, DO NOT read this message any further. For those interested, this is pretty easy one.

Here is the explanation:
Lets take any two digit number xy. It's value in decimal is 10x+y. Then we subtract the sum of the digits, that gives us following formula:
10x+y - (x+y) = a
Which is equivalent to 10x+y-x-y = a
Which can be reduced to 9x = a

So, the result (a) is always a multiplication of 9.

Now, have a look at the symbols for 9, 18, 27 etc. They are all the same!

That's all there's to it.

<font size=-1>[ This Message was edited by: spoimala on 2005-10-12 13:17 ]</font>

magic.

in case you wonder how Spoimala could solve this in just 20 minutes, read<a href=http://www.planetz.com/forums/viewtopic ... 5&forum=31> here</a>

cheers, Tom

Damn, see what ya get for not reading the posts 1st.

Sorry all hehe, good math skills to btw

Cheers!

On 2005-10-12 13:27, astroman wrote:
in case you wonder how Spoimala could solve this in just 20 minutes

No, it took only 4 minutes (a few test runs included) or so.
And no, I didn't know about the existing post, naturally I would have linked onto it if I knew.

oh c'mon we all know there's no rocket science behind this.. it's magic all the way. Voodoo magic. Spoimala can talk to numbers. And I saw a cow jump over the moon yesterday.

I've seen this before, but it's such an awesome trick. Less math, I think it's more cognitive science than anything else. Boy was I amazed, my jaws dropped off.

After you're done being amazed at basic pitch's riddle, try this:
http://www.20q.net/

This one grosses me out. It's based on neural network AI, and it'll try to figure out a word in your head by asking you 20 questions. Usually gets it right within 20 questions, sometimes more.

<font size=-1>[ This Message was edited by: kensuguro on 2005-10-13 07:07 ]</font>

Wow, it really is amazing!!

On 2005-10-12 23:22, spoimala wrote:
...No, it took only 4 minutes (a few test runs included) or so. ...

respect Spoimala, very focussed approach