A Psychic Computer?

[Sockstickler]

Check this. It's almost spooky.
http://trunks.secondfoundation.org/files/psychic.swf

 

[conehead180]

OMG.....that is kinda creepy....this is going right into my favorites.

 

[Cbarton]

Nothing psychic about it, any illusionist or math major could figure it out...

 

[amywood]

Nothing psychic about it, any illusionist or math major could figure it out...

No illusion about it either and very little math, mostly logic.

If enough women beg, I'll tell you how it works.

Meanwhile, try this:

1. Write a random number with three to eight digits.
2. Rearrange those digits to make a second number.
3. Subtract the smaller number from the larger number.
(Please be accurate or this won't work.)
4. Circle one of the non zero digits in the answer.
5. Tell me, in any order, the digits you did not circle.
(And save the paper you wrote this on. Don't laugh, some haven't.)

 

[Cbarton]

No illusion about it either and very little math, mostly logic.

What I meant was many 'magic tricks' use the smae principle they use for this website. Ihave done some using the same math principles they used to create this 'illusion' of a 'psychic' web site

 

[amywood]

What I meant was many 'magic tricks' use the smae principle they use for this website. Ihave done some using the same math principles they used to create this 'illusion' of a 'psychic' web site

Right, a little math, a little logic and "POOF", a magic trick.

The same thing happens here:

http://www.barry.fireflyinternet.co.uk/fun/files/tiny.htm

 

[Kalamos]

Explanation: the final digit always sums up as 9, or multiples: 0, 9, 18, 27, 36 and so on.
Give first digit as 10x, and the second y, [10x+y]-[x+y] always ends up as 9x.

 

[amywood]

Explanation: the final digit always sums up as 9, or multiples: 0, 9, 18, 27, 36 and so on.
Give first digit as 10x, and the second y, [10x+y]-[x+y] always ends up as 9x.

Right. Now figure out the firefly tiny.htm. It's a little tougher.

 

[Cbarton]

just as easy. Based on an old accountants trick. If you are balancing your checkbook and the final balances between you and the bank are not agreeing, you look to see if the difference between the balances is divisible by 9. If so, you have a digit flipped (example : $4.78 instead of $4.87). Here, they make you do it on purpose. when you do the subtraction, you have two sets of two digits that when added together will add up to nine. The website figures out which two add up to nine, which is the odd one out, and subtracts it from 9. This will be the circled digit.
Q.E.D.

 

[Currahee1974]

not going to banter, either way it was cool, nice find..thanks going to show that to a few friends

 

[amywood]

when you do the subtraction, you have two sets of two digits that when added together will add up to nine

It can be done with more than four digits, if I understand your statement.

Here's how it works.

314938
-134893
------
180045

Lets choose the 4. Now add the other digits together, 1+8+0+0+5=14 Since the answer is greater than 9, add those digits together, 1+4=5. Last step, subtract 5 from 9 which equals 4, the number we chose.

Let's choose 8 instead. Add the other digits, 1+0+0+4+5=10, and 1+0=1 and 9-1=8. Worked again.

I haven't tested it but this should work with very large number, 10 or 15 digits. Just keep adding the digits each time until you get to a single digit.

One minor exception. If the total of the digits is 9 the number chosen was 9 not 0.

 

[Cbarton]

It can be done with more than four digits, if I understand your statement.

Here's how it works.

314938
-134893
------
180045

Lets choose the 4. Now add the other digits together, 1+8+0+0+5=14 Since the answer is greater than 9, add those digits together, 1+4=5. Last step, subtract 5 from 9 which equals 4, the number we chose.

Let's choose 8 instead. Add the other digits, 1+0+0+4+5=10, and 1+0=1 and 9-1=8. Worked again.

I haven't tested it but this should work with very large number, 10 or 15 digits. Just keep adding the digits each time until you get to a single digit.

One minor exception. If the total of the digits is 9 the number chosen was 9 not 0.

Yes, as long as you have 2 or more digits, it should always work...