Hello again Gert. I agree; dividing by smaller numbers will logically take more time than dividing by larger ones - unless, of course, the larger number is so...
1793
Emmanuel/DATA
emmanuel_dub...
May 12, 2005 8:36 am
Gert Is that division related to the root extration ? Emmanuël ... http://us.click.yahoo.com/EA3HyD/3MnJAA/79vVAA/wHYolB/TM ... ...
1792
Fleissdr@...
May 12, 2005 7:25 am
Hi George, thank you very much! I think, that it takes more time to divide by 7 (than 11, than 13) instead of 1,001 (substraction technique). Do you know a...
1791
George Lane
george972453
May 7, 2005 10:12 am
Hi Gert, George here. There is an interesting factor to consider when dealing with the number 1001; it's one I use in the prime factorisation problems. it is...
1790
George Lane
george972453
May 7, 2005 9:46 am
Hi Harsha Personally, I would advise an initial education in the basics of maths (if necessary) and then a gradual change-over to working without writing down...
1789
Michael Curtis
mick_curtis
May 3, 2005 3:41 pm
Thank you to everyone who gave me help on this. Mike ;) ... http://us.click.yahoo.com/TzSHvD/SOnJAA/79vVAA/wHYolB/TM ... Send instant messages to your online...
1788
ralf_laue
May 3, 2005 1:31 pm
... Two book names already have been posted, but here are two interesting web pages: http://primes.utm.edu/curios/ and ...
1787
tito_zoulou
May 3, 2005 7:19 am
Golden Number linked to 666 Formal Proof needed Hello, While working on my websites on 666 myth ( http://www.666myth.co.nr/ French= http://www.666mythe.co.nr/...
1786
Fleissdr@...
May 3, 2005 7:19 am
Hello? I have a Question concerning fast division of numbers. For example the number 1,001 or 1,0001? When you have a long number f.i. 123,456,234,345,456 you...
1785
NIXON, Grant (Kanata)
GNIXON@...
May 2, 2005 1:21 pm
The book is entitled: "Penguin Dictionary of Curious and Interesting Numbers" The author is David Wells. This is indeed an interesting book. I am also sure...
1784
Mick Curtis
mick_curtis
Apr 29, 2005 10:00 pm
I live in London. Is there anybody nearby who could demonstrate a soroban to me? I am puzzled by it and I want to talk to someone who is happy to show me some...
1783
Jan van Koningsveld
jan_van_koni...
Apr 29, 2005 9:38 pm
This may have been "Curious and Interesting Numbers" by David Wells. Regards Jan ... From: Mick Curtis To: MentalCalculation@yahoogroups.com Sent: Friday,...
1782
Mick Curtis
mick_curtis
Apr 29, 2005 9:33 pm
Years ago, I flicked through a book which went through numbers from 1, 2, 3 onwards into the 100s, and for each number, there was an observation about the...
1781
Archana Rao
raoarchana2367
Apr 28, 2005 12:05 pm
Hi Harsh, The best method of teaching mental calculation is through Abacus. I would suggest you to find out the schools in your locality where mathematics is ...
1780
harsha_v12
Apr 28, 2005 11:48 am
Dear All, I'm new here and just registered myself into this group now. I have 2 kids aged 11 and 12. I want to teach them how to do mental calculations or...
1779
Emmanuel.DUBRULLE@...
Apr 27, 2005 12:35 pm
Correct the sentence and read : "900 next cubes; the principle is simillar to my technic to calculate squares" ... From: MentalCalculation@yahoogroups.com ...
1778
Emmanuel.DUBRULLE@...
Apr 27, 2005 12:27 pm
Hello all, here is a post I'have written on my private yahoo group in french to explain how I mentaly calculate the cubes; In my next post I will explain how I...
1776
Emmanuel/DATA
emmanuel_dub...
Apr 19, 2005 6:23 am
It showes there can be as many technics as calculators; Emmanuël ... http://us.click.yahoo.com/RzSHvD/UOnJAA/79vVAA/wHYolB/TM ... ...
1775
Oleg Stepanov
olegstepanov@...
Apr 18, 2005 10:57 pm
Long ago Robert Fountain find old book by Mr. Hutching. Only now I can made html. http://users.lk.net/~stepanov/mnemo/hutching.html This is not super. But this...
1774
rubeus_riddle
Apr 14, 2005 5:53 am
Hello Nathan, the url is http://members.cox.net/beagenius/main.html This link, in addition to others, can be found in the menu on the left side of your screen...
1773
Nathan Slaughter
slaughter_na...
Apr 14, 2005 5:39 am
I only joined the group a few days ago, but I'm interested in this website. Can someone give me an address? Nathan ... From: rubeus_riddle...
1772
rubeus_riddle
Apr 13, 2005 2:13 pm
Hello Scott, I am getting back to this message only now, because I tried to understand what you were saying, but I do have to ask you after all... ... system, ...
1771
Oleg Stepanov
olegstepanov@...
Apr 12, 2005 9:10 am
Come on, Emmanuel. How long you know me? :-)))) EDcei> Are you sure that he really multiples thoses numbers ??? Of course not... :-)))) EDcei> First he...
1770
Emmanuel.DUBRULLE@...
Apr 12, 2005 8:44 am
Are you sure that he really multiples thoses numbers ??? First he multiplies 3 x 3 digits numbers Seems that he memorized the table behind him;I perheaps...
1769
Oleg Stepanov
olegstepanov@...
Apr 12, 2005 8:24 am
ED> Oleg ;I do not understant any word of Russian all I ED> saw/understood was some mnemonics and calendar ED> calculation at the end; when does he begin his...
1768
Emmanuel/DATA
emmanuel_dub...
Apr 12, 2005 6:08 am
Oleg ;I do not understant any word of Russian all I saw/understood was some mnemonics and calendar calculation at the end; when does he begin his 10 x 10 digit...
1767
Oleg Stepanov
olegstepanov@...
Apr 11, 2005 10:39 pm
We have new super MC. On TV Show "Eyewitness" I watch new super MC. He can multiple on mind 10-digit numbers. If somebody want, it possible download file ...
1766
ralf_laue
Apr 7, 2005 1:43 pm
I assume that he did not try to solve 741 tasks but just refused to start solving the ones that that were too difficult. ... ...
1765
Emmanuel/DATA
emmanuel_dub...
Apr 7, 2005 7:58 am
What do you mean by unlucky task ? Emmanuël ... http://sciences.nouvelobs.com/cgi/edition/qobs_imprime?cle=20050406.OBS3199 ... ...
1764
ralf_laue
Apr 7, 2005 7:38 am
It has been reported that Alexis has extracted the 13th root from a 200 digit number: ...
