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Explain this one...


citizenralph

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Here's a hint.


Pick any two digit number, subtract each of the two digits as per the first step.


Now, what do the two digits of THAT number add up to.


Try it with a different two digit number. Same result?

 

 

Huh? Not following you at all...

 

There has to be some basic math thing going on here, because it is weird that you dont even click anything and it guesses right.

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Huh? Not following you at all...


There has to be some basic math thing going on here, because it is weird that you dont even click anything and it guesses right.

 

:facepalm:

 

Example:

 

Take the number 70

 

70 - 7 - 0 = 63

 

6 + 3 = ?

 

Or the number 80

 

80 - 8 - 0 = 72

 

7 + 2 = ?

 

Or the number 58

 

58 - 5 - 8 = 45

 

4 + 5 = ?

 

Or the number 23

 

23 - 2 - 3 = 18

 

1 + 8 = ?

 

The difference between a base-10 positive integer and the sum of its digits is a whole multiple of nine.

http://en.wikipedia.org/wiki/9_%28number%29

 

Look at the grid it provides on the second page, with the numbers and the gifts. ALL the multiples of 9 will have the same gift - the gift which it will finally guess.

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I get it, and it's very interesting. But what the hell does it have to do with the mind reader?

 

 

Look again...

 

Pick any multiple of 9 in that chart and that will always be the answer.

 

The chart changes, but every multiple of nine is always the same gift.

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You're guaranteed to get a number that's a multiple of 9. All the multiples of 9 result in the same gift. It's rigged.

 

 

Yup.

 

An old science teacher used this trick. He wrote an answer to this type of question on his hand with some chemical that could not be seen to the naked eye. He called out "random" questions like this one and in the end made something burn in a blaze of bright colours and rubbed the ashes on his hand, revealing the answer in soot.

 

It was damn cool to watch, but most of us saw him leading us to a known conclusion in terms of the answer itself.

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Yup.


An old science teacher used this trick. He wrote an answer to this type of question on his hand with some chemical that could not be seen to the naked eye. He called out "random" questions like this one and in the end made something burn in a blaze of bright colours and rubbed the ashes on his hand, revealing the answer in soot.


It was damn cool to watch, but most of us saw him leading us to a known conclusion in terms of the answer itself.

 

 

One of my old science teachers used to explode hydrogen-filled balloons in the lab. It was like a fleet of pint-sized Hindenbergs.

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