Mind Probe!!

by **BIG GREEN** on Tue Feb 17, 2004 10:51 am

http://www.ebaumsworld.com/mindprobe.html

..anyone care to explain to me how that thing works?..cause it freaks me out everytime i do it.

by **benji** on Tue Feb 17, 2004 11:27 am

When you subtract the digits it becomes a multiple of nine.

by **MC Hao** on Tue Feb 17, 2004 1:12 pm

9, 18, 27, 36, 45, 54, 63, 72, 81 all have the same symbol everytime. and when you use that formular on any number from 10~19, you get 9; when you use that formular on any number from 20~29, you'll get 18...and so on. that's how it works. clever for someone to think that up. :lol:

by **Andreas Dahl** on Tue Feb 17, 2004 7:36 pm

ehm, it didn't work... :wink:

by **Null17** on Tue Feb 17, 2004 7:51 pm

i've different versions of this puzzle. freaked me out at first when my friend showed me then i noticed the multiples of 9 thing... not so freaky afterall

by **Guest** on Tue Feb 17, 2004 10:59 pm

MC Hao wrote:9, 18, 27, 36, 45, 54, 63, 72, 81 all have the same symbol everytime. and when you use that formular on any number from 10~19, you get 9; when you use that formular on any number from 20~29, you'll get 18...and so on. that's how it works. clever for someone to think that up.

That makes sense. But get this, i decided to skip the whole numbers thing and just pick a number at random, it took about 10 goes b4 it got 1 wrong!!
That was freaky!

by **Ruff Ryder** on Thu Feb 19, 2004 10:18 am

http://www.ebaumsworld.com/trick1.html

Try this one. It gets me every time too.

by **benji** on Thu Feb 19, 2004 10:27 am

It should since it removes all the cards it showed before and displays different ones.

by **MC Hao** on Thu Feb 19, 2004 2:49 pm

yeah, that was a bad one.

by **hmm** on Sun Feb 22, 2004 3:20 am

by **hmm** on Sun Feb 22, 2004 3:23 am

by **EGarrett** on Mon Feb 23, 2004 2:34 am

Your subtracting the two digits from the number, right? Look at this way...

99-9 = 90...90 - 9 = 81
98-8 = 90...90 - 9 = 81
97-7 = 90...90 - 9 = 81

94-4 = 90...and 90 - 9 = 81

77 - 7 = 70...and 70 - 7 = 63

74 - 4 = 70...and 70 - 7 = 63...

You'll always get a multiple of nine...because when you subtract the last digit you get a multiple of 10 (47 - 7...46 - 6...etc)...then you subtract the 10s value which will always be the same and thus for that group the number will always be the same. Take a close look at the symbol chart. All the multiples of 9 are always the same symbol

If you don't get that symbol...check your arithmetic.

Mind Probe!!

Mind Probe!!

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