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goonerjack New user England 37 Posts |
Hi all
I remember seeing a trick which worked on a mathematical principle, and I wanted to use the principle in another trick, but I can't remember exactly how it went... The trick - basically the magician shows a piece of glass with numbers on... the spectator starts on any number and spells the number which they are on, then the resultant number 3 (??) times. They note which number/time they have ended up on, the magician blows on the glass and the hands are pointing to the spectator's number/time. I'm not interested as to how the hands appear, it's the mathematical principle that I would like to know about... The principle - essentially I would like to know exactly how that principle works (I've got a feeling it's quite old!)... how the magician can force a certain time by letting the spectator spell 3 times, seemingly of their choice Many thanks, Jack |
Scott Cram Inner circle 2678 Posts |
I first read about it in Jim Steinmeyer's "Impuzzibilities", under the name "The One O'Clock Mystery". Jim Steinmeyer is usually quite good about crediting, yet offers no credits in the write-up. I can only assume this means it is original with him, unless someone knows otherwise.
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balducci Loyal user Canada 227 Posts |
Quote:
On 2004-07-02 19:02, goonerjack wrote: If you really just want to be reminded how the trick goes, watch the "Watch Crystal" movie demo at Penguin magic ... As for the principle, if you perform the effect on yourself 3 or 4 times you should be able to figure it out on your own.
Make America Great Again! - Trump in 2020 ... "We're a capitalistic society. I go into business, I don't make it, I go bankrupt. They're not going to bail me out. I've been on welfare and food stamps. Did anyone help me? No." - Craig T. Nelson, actor.
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Alan Jackson Elite user Cardiff, UK 432 Posts |
The name of the principle is the Kruskal Principle. It's usually applied to cards but has only a high probability of working: it's not certain to work. The clock version is completely deterministic (after three spellings).
There are 10 kinds of people: those who understand binary numbers, and those who don't.
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balducci Loyal user Canada 227 Posts |
A link to a paper (and further references) on the Kruskal Count, for the die hard mathies in the audience:
http://arxiv.org/PS_cache/math/pdf/0110/0110143.pdf Also, see "The Kruskal Principle" by Fulves and M. Gardner in The Pallbearers Review, June 1975.
Make America Great Again! - Trump in 2020 ... "We're a capitalistic society. I go into business, I don't make it, I go bankrupt. They're not going to bail me out. I've been on welfare and food stamps. Did anyone help me? No." - Craig T. Nelson, actor.
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