A 3 digit number times a 2 digit number. How many variations are there? The 2 digit number would not be 00 or 01. eg. 334 x 02 eg.044 x 83 OR 83 x 044 ...
Well, this will be a gigantic task. This is much more difficult than the worlds best memory record (memorizing about 42,500 digits of pi). But when it comes...
Like you say, it would be tedious. I am just interested in learning to use the Trachtenberg method well. But I like thinking about the memory approaches which ...
Why not start with 2 digit by 2 digit, that would only require 5050 different combinations to learn? By then you might find that it was easy enough to work out...
An interesting approach, as two-by-two problems would lead to a speed advantage in four-by-twos, as you say. And even better when, if we assume no two-digit...
My appraoch in two x two was based on arround 2812 different answers, and take a lot of time to get the 0.5 second reflex for an answer, u should use different...
Dear George! I beg your pardon for my poor English! Thank you very-very much for your message! I agree with what you wrote: "It seems, from what you say, that...
Dear Alberto! I beg your pardon for my poor English! I did write a reply to you a few days ago but it didn't appear here because I probably made some mistake. ...
Hello Oleg;
Can you please tell us how many figures you can multiply together
can you beyond 3 x 3 figures ?
Emmanuël
----- Original Message -----
From:...
Dear Emmanuel, it is possible to multiply numbers of any length! Just try to find a descriprion of this method somewhere on the Internet! Oleg, aka The...
OR> Dear Emmanuel, it is possible to multiply numbers of any length! Just OR> try to find a descriprion of this method somewhere on the Internet! Dear Oleg....
Oleg Stepanov
olegstepanov@...
Jun 13, 2005 5:29 pm
1829
Oleg Stepanov understood very well
Oleg I can multiply big figures up to 5 x 5 sometime 6 x 6 figures (I train
with 5 x 5 figures) from left to right but I...
ED> Oleg Stepanov understood very well Oleg Stepanov always understood very well... :-))) Just for fun. Some time ago on Russian TV was show with me. This is ...
Oleg Stepanov
olegstepanov@...
Jun 13, 2005 7:59 pm
1831
Really fantastic;
I didn't know that your fields of interrest was so vaste. I thought you were
overall insterested in MC, meemonic and intellectual games;
Of...
ED> Really fantastic; ED> I didn't know that your fields of interrest was so vaste. I thought you were ED> overall insterested in MC, mnemonic and intellectual...
Oleg Stepanov
olegstepanov@...
Jun 13, 2005 9:04 pm
1833
Hi, Check out this link: http://www.mathabacus.com I've checked out the site, bought the ebook and I find that it's useful....
Hello, I am happy to announce that we will organize the second Mental Calculation World Cup. It will take place *next* year, from from 3-5 November 2006 in...
Thanks ! Is there any prabability for organizing in this year also. ... From: "Ralf Laue" <info@...> To: <wwbc@yahoogroups.com>;...
Arun Mangal
arunmangal@...
Jun 21, 2005 4:11 pm
1836
Issam , What do you mean with 2812 answers ? Are you talking about general rules , some pre-memorized results or both? Thanks. Javier. ... and take a lot of...
Sehr geehrter Herr Laue, ich hätte Interesse, im Rahmen der Kopfrechenweltmeisterschaft mit einem neuen Gedächtnisweltrekord aufzuwarten. Wie Sie vielleicht...
You can see me in a TV program as The Human-Computer in my taxi cab on Sunday, July 3 at 2 P.M. Eastern Standard Time on ABC channel (channel 7 in New York...
Guys, to answer this question I have to repeat: I don't practice multiplication of big numbers in my head because it's not interested for me, the Calender is...
Is there any site about multiplying two numbers mentally? Is there any way to multiply two numbers without having to remember a lot of numbers [except carry's...
Hi; To be able to calculate quickly and easily any 2 digit number, extend your multiplications table to 25 x 25; (although up to 12 x 12 could be sufficient...
Subject: cubic root/square root - mental calculation. Regarding: details of world records , if any. Hi, As informed earlier I'm capable of doing mentally...
Kurien Thomas
rajukunjumol@...
Jul 4, 2005 7:39 am
1843
... "Trachtenberg's speed system of basic mathematics" might be a good place to start. http://www.amazon.com/exec/obidos/ASIN/0285629166/rekordklubsaxoni ...
Thomas, concerning cubic root I extract roots from 15,18,21,24 in less the 30 seconds for odds numbers. It takes me much more time for even numbers and numbers...
I have looked into the Trachtenberg system a little bit. But are Trachtenberg's multiplication procedures designed for the mind? i.e. can an average/above...
Hi there. I'm not aware of any official world records in the area you describe, since records in the square root area are usually answers to inexact roots of...
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