# Activate your brain on Monday morning :-)

Off topic: Activate your brain on Monday morning :-)
Dees
United Kingdom
Local time: 01:26
English to French
+ ...
 Mar 20, 2006

If you have a bit of the Monday morning blues and want to stimulate your brain, then check that out and try to find the trick, if any...

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

Happy Monday!

[Edited at 2006-03-20 10:52]

[Edited at 2006-03-20 10:57]

Silvia Montufo Urquízar
Spain
Local time: 02:26
French to Spanish
+ ...
 Thanks! Mar 20, 2006

Amazing! Surely there must be a trick, but I can't find it!

Marion Schimmelpfennig
Local time: 02:26
Member (2003)
English to German
 Tell me the trick! Mar 20, 2006

This is intriguing - and weird. I cannot find the trick. Can anyone, please!!!!!????

Sylvain Leray
Local time: 02:26
Member (2003)
German to French
 Scary Mar 20, 2006

I knew this but I still find it scary
I simply don't understand "how they do"...

Sylvain

Kirill Semenov
Ukraine
Local time: 03:26
Member (2004)
English to Russian
+ ...
 Your `flower' symbol? The mystery unveiled... ;-) Mar 20, 2006

Now, people, you just need to know your math a bit to unveil the trick...

Any 2-digital number - say, AB (with A and B be digits) - is in fact 10*A+B.

Then the sum of the digits is A+B.

When you substract, you have:

10A + B - (A+B) = 9 * A

So, with A being a digit (1 to 9), we have only 9 possible choices: 9, 18, 27... up to 81.

As you may see in the table on the site, EVERY number divisible by 9 and less than 82 has the same `flower' symbol associated with it.

Jabberwock
Poland
Local time: 02:26
Member (2004)
English to Polish
 Well, it's an old one... Mar 20, 2006

This is a new take on the old trick, very nice!

I do not want to spoil all the fun, so I add the link with the explanation:

http://owl.infosys.utas.edu.au/mathemagicians_circle/table4.html

PAS
Local time: 02:26
English to Polish
+ ...
 The world must be soooo boring for those math-thinking types :-P Mar 20, 2006

Kirill gets the party pooper award for spoiling the magic of the crystal ball.

I will detract from the fun some more:

If you just click the crystal ball without "thinking of a number", you will get a different symbol each time, right?

Well - after you click the "try again" button, take another look at the chart on the right. Mr. Naughton was smart enough to shuffle the symbols around to give us the illusion of guessing a different symbol each time, but the symbol beside each multiple of 9 remains the same...

Cheers,
Pawel Skalinski

Joanna Borowska
Poland
Local time: 02:26
English to Polish
 Thanks, Kirill, now I get it! Mar 20, 2006

I checked and the symbols next to the numbers change every time you play. So one time all the numbers divisible by 9 are associated with, say, a flower, next time with a cross, then a square and so on. Hah! No magic then

Kirill Semenov
Ukraine
Local time: 03:26
Member (2004)
English to Russian
+ ...
 My apologies :) Mar 20, 2006

My sincere apologies to everyone who believes in Santa Claus or mind-reading via Internet. I just thought it was a really simple `magic ball' - sorry for crashing it.

To anoint the psychological trauma caused, I promise to post something more tricky to exercise our brains... Not today, sorry again, but as soon as I have a spare time.

PAS wrote:
Kirill gets the party pooper award for spoiling the magic of the crystal ball.

Piotr Wargan
Poland
Local time: 02:26
English to Polish
+ ...
 Oh my... Mar 20, 2006

So.... it wasn't the first really interactive site with brainwave communication between a man and a machine

Cheers!

Oliver Walter
United Kingdom
Local time: 01:26
Member (2005)
German to English
+ ...
 here's another internet mind reader Mar 20, 2006

This one doesn't show you the card that you thought of - it takes it away from the set of cards displayed (yes it does).
Oliver

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### Activate your brain on Monday morning :-)

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