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Thomas Henry Inner circle Minnesota 1394 Posts |
Greetings, Friends,
I've got to be careful here, since this is an "open" part of the Café, but I think I can successfully obscure methods from prying eyes. Are you familiar with Karl Fulves' "Future Thought?" You can find it in his Self-Working Number Magic, (New York: Dover Publications, Inc., 1983), pp. 53-55. The presentation is weak, but I've got a barnburner of a new take on it that really spices it up: the participant gets to roll out the dice herself for a random number, rather than the performer simply setting a die down. It's very direct. I intend to release it on the Café for free (in Inner Thoughts). In his write-up, Fulves mentions that this is L. Vosburgh Lyon's handling of something from Royal Vale Heath. So my question here for you number fans: where? I searched all issues of The Jinx, The Phoenix and The New Phoenix for all of Lyons' articles (journals he was known to write for), but no soap. Can any of you suggest other sources to search for methods from Lyons? Or, again keeping it somewhat obscure from eavesdroppers, do you know of any sources I should be aware of on the properties of 1001? Curious number, that, at least in the way it pops up in "Future Thought." Thanks for any hints or tips on Lyon's sources you can provide. You will be rewarded! Thomas Henry |
saxonia Regular user 168 Posts |
Hello,
L. Vosburgh Lyons: Future Thot, Pallbearers Review Vol. 3, No. 11 (September 1968) It's on page 205 of the book containing vol. 1-4. Best Wishes, Ralf |
Thomas Henry Inner circle Minnesota 1394 Posts |
Hello Ralf,
Thank you very much for that reference; I never would have found it otherwise. Now it's just a matter of seeing if I can locate the book. Like most of Fulves' stuff, this is in rather limited circulation. Thanks again for your diligence. Thomas Henry |
saxonia Regular user 168 Posts |
Dear Thomas Henry,
if necessary, I can write you a few words about the main idea in a PM. One more thing: The "secret" properties of 1001 are not so secret anyway. Everyone who is really interested in mental calculation knows about them. The bad news is that so few people are. Anyway, do not perform this trick for maths teachers. Best Wishes, Ralf |
Thomas Henry Inner circle Minnesota 1394 Posts |
Hello Ralf,
Thank you again for the link. It appears the Fulves treatment is identical to the original Lyons presentation (apart from changing the spelling of the name slightly!) Yes, 1001 is a curious number. One interesting use is the elegant way it figures into a simultaneous divisibility test for 7, 11 and 13. Here's an example, if anyone hasn't seen this before. Split up any large number into groups of three, which is how we write numbers with commas anyway, say 38,731,207,535,111 Now starting from the left, add the odd groups and subtract the even groups, here: 38+207+111-731-535 = -910 Then simply test -910 for divisibility by 7, 11 and 13. In this example, 7 and 13 go into -910 evenly, and hence will also go into the original number 38,731,207,535,111 evenly. Thomas Henry |
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