Hermann Kinkelin, "Berechnung des christlichen Osterfests" (1870) should earn all the praise which has been given to Lichtenberg in respect to completing the...
Here you can find more detailed information about Christian Zeller (1822 - 1899), mathematician, theologian, and schoolman, together with a translation of all...
Dear Alberto, From 16-26 april I'll visit Javier Mañana for calculation matters. I do not know if everything for the Oviedo university is already 100% clear. ...
... Dear Willem, I think you know the answer. In my opinion someone who claims the prestigious title "Mental Calculation World Cup Winner" should be able to...
Dear Willem: yes, I live in oviedo :) Now I am in Mexico, in april I will be in another country :), but i would like see you in this dates best wishes alberto ...
I have just come across http://berndt-schwerdtfeger.de/cal/cal.html: GAUSS´CALENDAR FORMULA FOR THE DAY OF THE WEEK by Berndt Schwerdtfeger, Copyright 2001 -...
Dear Calculators, In the past weeks, we have seen a lot of discussion about the titles in the Mental Calculation world Cup. I am very glad that I can publish...
Hello, As I had to realize from my e-mail that my comment on the type of operations that can occur in a surprise tasks gave some reason for misunderstandings,...
Wikipedia does not claim to be an encyclopedia. I know because I read it somewhere on wikipedia! So it is true. ;) It does have 'experts' who edit their area...
Dear Mental Calculators, Please watch and share the following video. Who knows, perhaps you can meet yourself or one of your your mental calculators in it. ...
Hi Michael, Â That's a very interesting thought. Personally, I don't trust 'Wiki' any further than I could throw a three ton truck. On the advice of a...
Good afternoon Michael, On wikipedia I found something about mental calculation. There were some things incomplete and incorrect, so I made a message, in which...
????? Can you tell us how to explain that you were two years dead? ... De: George Lane <george972453@...> Asunto: Re: [Mental Calculation] Calendrical...
Hello Willem and George, you are of course very right about the faults in Wikipedia. Nevertheless have quite some examinations shown, that Wikipedia has not...
Hi there! Â I believe the source of the misinformation came from the announcement of the death of another 'George Lane'; perhaps the man who took the...
Hello, everyone: I am a 20-some MC, with a question below about Multiplication methods. I do not like cross multiplication very much. I'm trying to find a way...
Dear Steven, Well, you do calendar calculation, but you cannot calculate your age: 20 some???? Cross multiplication: all the mc's I spoke till now use only...
Hi Steven, Â Personally, I prefer the cross method for multiplication, but that's just a matter of personal preference; I'm a strong believer in 'each to his...
Dear Willem: Thank you, and George, for responding. As far as my age, I do know I'm 24, and I tend not to give much info about myself. Here I have a link that...
Good evening Steven, Exchanging ideas is never untidy! Now I have seen the lattice multiplication. I understand how it works. I did 36×71 according to your...
Dear Willem: I'm sorry, that's not exactly my idea, though the answer is correct. The "Odd and even steven" method: Lets do 36 * 71. 1) 71-36=35 2) 35-1=34 3)...
good afternoon Steven, To be honest: 36×71: since my 8th year I knmow all the 2×2 multiplications by heart, so the way I did it was a detour. And as you...
Hello Steven, Thank you for your clear example of what you are talking about. For me, it is great when people break things down into steps which do not involve...
Good afternoon Michael, As I am since about 60 years confident with the 9 and 11 test, for checking answers, and think - do not know exactly- that this is...
Dear Mathletes, I would like to remind you that only two weeks are left for sending the registration forms for the "Mental Calculation World Cup 2010". For...
The World Cup will be held on 3-5 June or on 5-7 June? ... -- Yusnier Viera cell: (786)712-4787 yusnierv@... www.yusnierviera.com [Non-text portions of...
Yusnier Viera
yusnierv@...
Mar 16, 2010 10:13 pm
3394
I am very sorry for posting the wrong date once again. The event will take place from 5-7 June! Dear Mathletes, I would like to remind you that only two weeks...
Case No. 3 Lichtenberg - Zeller - Kinkelin - Piper Kinkelin (1870) was not the first. He only simplified an algorithm which had been published in 1841: ...
