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...
Kurien, The times you posted for the square root extraction of perfect squares would not be considered fast by anyone practiced in mental calculation. Times...
I'd actually love to see how you do it and some examples if you can. I'd be really grateful. I'm a newbie to this and joined the group to learn the tips and...
Robert Loggins, Thank you for your immediate reply/response.However I am unable to understand fully /interpret the contents of your reply relating to squire...
Kurien Thomas
rajukunjumol@...
Jul 5, 2005 7:33 am
1851
Do you want to look at 2 numbers and, while looking at them, say from right to left the answer? Also, recently, there was described a very achievable way of...
Kurien, My detailed explanation/examples will follow this post. I was saying to you that your time of 30 seconds to find the square root of an 8 digit perfect...
I'm glad Robert clarified his point for Kurien. I was about to comment but now all I have left to say is that there is perhaps too much emphasis on speed in...
collegues, Integuer square root are easy to do, to find the square root of an 8 digit perfect square number take less than 5 seconds. best regards Issam...
Congratulations, Ralf. The second Mental calculation World Cup is a great new for mental calculation and mental calculators. Best wishes. Alberto Ralf Laue...
Hello, Does that mean that we already should ask for an inscription ? Because 16 months, it is so far! ;) Thank you. And congratulations for London 2012! Jean....
... Hello, no, there is no need to send the form now. However, an informal e-mail if someone isinterested in taking part would be nice. This can help us to...
Hello Rafe, Arun Mangal from India Great to know about 2nd MCWC I am interested to take part in this event again. When should I send my application form ...
Arun Mangal
arunmangal@...
Jul 7, 2005 3:22 pm
1860
oops! this had been intended as a private email to ralf, but I mistook the REPLY function, and now the request of Ruediger Gamm and me is public. I am very...
Hello, it is a pleasure for me to announce that I have received the documentation about a new world record which is now verified: Jorge Arturo Mendoza Huerta...
... http://www.recordholders.org/en/events/worldcup/2004/ ... ___________________________________________________________ How much free photo storage do you...
no matter ! But it is intersting to know german lanfuage Arun Mangal INDIA ... From: "mnempi" <voigt@...> To: <MentalCalculation@yahoogroups.com> Sent:...
Arun Mangal
arunmangal@...
Jul 8, 2005 3:22 pm
1864
Thanks Ralf!! The Mathematikum looks like a fascinating place. Have you seen these books before? They are the books from which Wim Klein took his methods. ...
The 4th of July holidays here in the USA ( to celebrate our release from English oppression) have now ended and I will have time to give some examples of the...
Hi Robert, I am also new to this group and would like to improve my mental math ability. Please add me to your mailing list on the topic so I could learn more...
Hi everybody: This is a good new for me. Ten 10-digit numbers in 5 min 36 seconds is very easy . I think I could do it in less than 4. 30. Best wishes. ...
... I hope Alberto will not mind me posting this link: http://www.xtec.es/centres/a8019411/video_acoto.htm The addition performed by Alberto in the film bears...
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