Browse Groups

• Goto Message #
5089
anyone ever read le calcul rapide (French) Hello dear calulators and numbers friends :-) Has anyone ever read this book? Henri Wargée Le calcul rapide en vingt-cing leçons If you did, can you
retothejuggler
Dec 4
#5089

5088
Re: Accidently found factoring record Dear Reto, The questions I lose are 100% without any expedient. A friend of mine, promoted mathematician and assistant professor, gave me an impression of what
A.W.A.P. Bouman
Nov 20
#5088

5087
Math Encounters: Secrets of Mental Math Prepare to be mesmerized as award- winning Harvey Mudd Professor of Mathematics Arthur Benjamin demonstrates (and explains!) how to do rapid mental
mentalmathandcatlover
Nov 19
#5087

5086
Re: Accidently found factoring record Dear Willem I agree that this lists are very helpful. But still, puzzling out a 120 digit number is impressive. I`ll present you an easier number here to show
retothejuggler
Nov 19
#5086

5085
Re: Accidently found factoring record Dear all, What Mittring has done is fining prime numbers out of a list which contents them. In German it is presented as “einziges Hilfsmittel”. In fact it
A.W.A.P. Bouman
Nov 18
#5085

5084
Accidently found factoring record Here http://www.youtube.com/watch?v=vK5uFP28TWY Gert Mittring is factoring very large numbers, at least he finds out how to combine them correctly .:-o.
retothejuggler
Nov 17
#5084

5083
New Arthur Benjamin videos Dr. Arthur Benjamin of Harvey Mudd College has 2 new videos out that my fellow mental calculators might enjoy. The first is a 78-minute lecture in Washington,
econalc
Nov 17
#5083

5082
Re: K-Train problems using IE 10 Dear all, Excuse me please, I am not 100% sure. As far as I know the problem can also be related with the Windows version. XP could be good, later versions
A.W.A.P. Bouman
Nov 6
#5082

5081
K-Train problems using IE 10 Dear all, a friend of mine is trying to use K-Train but it did not work on his computer. As it seems this is a problem of Internet Explorer 10. I use IE 9 and
Jan van Koningsveld
Nov 5
#5081

5080
Re: Today Google Celebrates Shakuntala Devi's Birthday There is a nice embedded video from RT on her visit to Moscow within this article.
Kenneth Wilshire
Nov 4
#5080

5079
Today Google Celebrates Shakuntala Devi's Birthday Hello, have a look at Google India today: https://www.google.co.in Looks nice! (or see
Ralf Laue
Nov 4
#5079

5078
Re: Request Amazon. Used Sent from my iPhone On Oct 26, 2013, at 12:23 PM, "A.W.A.P. Bouman" > wrote: Dear Mr or Mrs
Foley, Stephen
Oct 26
#5078

5077
Re: Request Check out abebooks.com for a copy. I had to pay around 100 Dollars as well...another idea is to check out your library to get a chance to read it. ... To my
retothejuggler
Oct 26
#5077

5076
Re: Request Dear Mr or Mrs ??????? The book is from ± 1983, and as far as I know no more available as a new book. I wonder if it is on internet and could be downloaded. I
A.W.A.P. Bouman
Oct 26
#5076

5075
Re: Request To my best knowledge, there is no e-book. If there is a possibility to download the book anyway, it would obviously an illegal source. Try
ralf_laue
Oct 25
#5075

5074
jpeibons
Oct 25
#5074

5073
Re: Digest Number 1641 Dear Yusnier, I missed you in Lisbon, and I hope to see you in London 2015, when I go for a time < 37 s. Ulrich
Ulrich Voigt
Oct 12
#5073

5072
Re: speed-memory contest 2013 in Lisboa Yusnier! I missed you in Lisbon, and hope to meet you in London 2015 at the next Campeonato Munial de memoria rápida, where I will go for < 37 s. Ulrich ...
mnempi
Oct 12
#5072

5071
Re: speed-memory contest 2013 in Lisboa Gracias hombre, pero no soy yo, sino es Leif Silverein, quien tiene el "record". Pero me gustaria mucho, si tu quisieras probar "Mathletics" tambien.
office
Oct 11
#5071

5070
Re: speed-memory contest 2013 in Lisboa Congratulations on your new record!
Yusnier Viera
Oct 10
#5070

5069
Re: speed-memory contest 2013 in Lisboa The time achieved was 38.86 seconds. ... In the Universidade Lusiade, Lisboa, October 5 - 6 there will be the 2013 speed-memory contest. www.speed-memory.com.
mnempi
Oct 10
#5069

5068
Re: New World Records Freddy and Yusnier are also in the Guinness book. I have tried to reply to Nodas's query regarding some 'historical' multiplication records, but the message
rob221b
Oct 9
#5068

5067
(no subject) Hello Every One Would you please inform me about the problem solving Math competitions in the world. Thanks & Regards, Priyanshi Somani
Priyanshi
Oct 3
#5067

5066
speed-memory contest 2013 in Lisboa In the Universidade Lusiade, Lisboa, October 5 - 6 there will be the 2013 speed-memory contest. www.speed-memory.com. At that occasion (Saturday 13:30) I will
mnempi
Sep 30
#5066

5065
Re: New World Records / thought processes?      Can anybody share the various mental "thought pocesses"/methdologies employed by lightning  calculators for arriving at the square root ? I will
SHAHID NIAZI
Sep 30
#5065

5064
Re: New World Records Hi folks,   Some spectacular records indeed! Extreme performances which leave me wondering where the limits are - or even if there are any limits left.
George Lane
Sep 29
#5064

5063
Re: New World Records Dear all, About the square root new world record I have only one word: flabbergasted! Congratulations Granth Rakesh Takkar!!!! Best regards, Willem Bouman Van:
A.W.A.P. Bouman
Sep 29
#5063

5062
Re: New World Records Hello Suppose I know that the square root of a number for example 458716 begins in : 677.2 Could someone give an algorithm to know another digits after
Sep 29
#5062

5061
Re: New World Records Hello, Congratulations to Granth Rakesh Thakkar and Rhea Shah. Amazing new records indeed. Especially the 67.5" seconds for all the correct 80 digits, for all
nodden_1984_mes_gr
Sep 29
#5061

5060
New World Records Hello, a number of excellent records have been set at the recent Turkish Memoriad. They can be found at http://www.memoriad.com/2013Records/records.asp -
Ralf Laue
Sep 28
#5060

View First Topic Go to View Last Topic