try this

7up Clear Maths
Easy mathsTHIS ONE WILL BLOW YOUR MIND!I know there must be a very logical answer to this, but so far can't figure it out. Can you?? This came to me from a guy who has two masters and one doctorate degree and was a former instructor at the Naval Academy and he couldn't figure out how it was done. So don't write me back asking how they do it....THIS IS GREAT TRY IT!!!!!
Can you figure out how this works?1) Go to the link below. After reading each window, click on the boy in the lower right corner of the picture.2) In the last window type in your answer in the white box using the Keyboard (there is NO cursor).3) Watch the paper in the boy's hand. You will be amazed. And no, I don't know how it's done.click here:http://digicc.com/fido/

 

Woah, Amazing :thumb:

 

That's amazing:confused:

Here's a couple of others

http://www.caveofmagic.com/

http://www.milaadesign.com/wizardy.html

 

The card ones easy to figure out working on the others.

 

I don't know how, just think...wow!

Thank you.

cheers

 

I typed in a number and it showed it to me? :lollol:

 

it just works out all the possible combinations, in the end I had 522 and had circled 5, you type in 22 and it looks for the combination with 22 at the end (there will only be one), so then it knows the answer is 5. Simple really!

 

Oh, maybe I did the maths wrong or something. I picked two 4 digit numbers that came to 90, I typed in 9 and it came out with 9... I think maybe I was supposed to type only the zero... I don't know :D