# Thread: how do they do this ?

1. Web Hosting Master
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## how do they do this ?

this is one of those sort of tricks with numbers that magicians use .. but how is it actually done ?

I can't work it out

http://www.mot.be/dutch/GuessTool.htm

2. Web Hosting God
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I want to know too.

3. Web Hosting Master
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Wow, that's pretty cool

4. Web Hosting Master
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Actually it's not that hard to see whats going on. Simple maths

5. Web Hosting Master
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what simple maths ?

tell me, tell me, it's getting to me

6. Web Hosting Master
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He's a wizzard.
I'ts magic

doh!

7. Web Hosting Master
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It's all maths use the brain!

8. Web Hosting Master
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Cummon Darth, spill the beans my friend. This one is killing me.

9. Junior Guru Wannabe
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10-19 will result in 9
20-29 will result in 18
30-39 will result in 27
40-49 will result in 36
etc

Which are all multiples of 9... and they all have the same image.

10. Web Hosting Master
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That still doesn't explain it for me, sorry.

11. Junior Guru Wannabe
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Whatver number you choose, the result from the sum will always be a multiple of 9...so all multiples of 9 have the same image.

12. Disabled
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For example, you choose the number: 10. Then you do the subtraction: 10 - 1 - 0 = 9. Take the number 11 for example, 11 - 1 - 1 = 9. All the numbers from 10 to 19 will result as an answer of 9.

All the numbers from 20-29 will result as an answer of 18, etc.

The numbers 9, 18, 27, 36, 45, etc. are multiples of 9. If you look on the page with all the images of the tools, #9, 18, 27, etc. all have the same image.

Got it?

13. Web Hosting Master
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hmmm, no wonder I dropped out of mathematics

14. Web Hosting Guru
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Confusing at first... Thanks progex!

15. Web Hosting Master
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ah of course

that magic number 9

thanks

16. Web Hosting Master
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Yes thank you, that was doing my head in.

The fact that the images change each time you re-load the page, that's what sucked me in to thinking it was different each time.

17. Web Hosting Master
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Nor me, i've had different images. I've used 59,12, 58 - all have different images.

18. Disabled
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Hrm, the first few times I tried it, the second image corresponded to the image I picked.

However, after doing it several times after, some of the images didn't correspond.

19. Web Hosting Master
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They randomize the tools each time so you won't easily figure out the secret. However, this IS a multiples-of-nine trick. Every time you load the page new, the tools pictures in all the multiples of nine are the same. Check the tool in 9, 18, 27, etc to see.

20. Web Hosting Master
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Math and Common Sense. = Possibilities?

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