- #1

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this is weird, it turned out to be quite accurate when i play with it.

How? How they do tat? Any theory behind this?

- Thread starter darkar
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- #1

- 181

- 0

this is weird, it turned out to be quite accurate when i play with it.

How? How they do tat? Any theory behind this?

- #2

matthyaouw

Gold Member

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Its simple maths. If you do the sum it gives you, there are realatively few answers that it can give, and all these answers are assigned the same symbol on the chart, and then brings up that symbol when you click it.

Try working out more than one number before you click on the ball, and see if they all come up as the same symbol.

Try working out more than one number before you click on the ball, and see if they all come up as the same symbol.

Last edited:

- #3

DaveC426913

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The key then is to realize that, no matter what initial number you picked, only certain answers will apply:

Code:

```
99 : 9+9 = 18 : 99-18=[B]81[/B]
98 : 9+8 = 17 : 98-17=[B]81[/B]
97 : 9+7 = 16 : 98-16=[B]81[/B]
96 : 9+6 = 15 : 98-15=[B]81[/B]
...
90 : 9+0 = 9 : 99-9 =[B]81[/B]
89 : 8+9 = 17 : 89-17=[B]72[/B]
88 : 8+8 = 16 : 88-16=[B]72[/B]
...
80 : 8+0 = 8 : 80-8 =[B]72[/B]
```

No matter what initial number you choose, it is going to result in one of those few special answers.

.

- #4

Danger

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It's basically just a computerized version of one of the old stage 'mind-reader' tricks.DaveC426913 said:no matter what initial number you picked, only certain answers will apply

- #5

DaveC426913

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Uh well, sure, but that doesn't really explain anything does it? :uhh:Danger said:It's basically just a computerized version of one of the old stage 'mind-reader' tricks.

- #6

rachmaninoff

xy - (x + y) (xy means two digits, not multiplication)

=(xy - y) - x

=x0 - x

=x * (10 - 1)

=9 * x

qed

So the only possible numbers are 9, 18... 81, and they all have the same * symbol.

- #7

Danger

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I didn't have to explain anything. I was just elaborating uponDaveC426913 said:Uh well, sure, but that doesn't really explain anything does it? :uhh: