Hi guys. Although this particular disposition doesn't answer the main question below, it seems it may be of interest to a few people out there. For anyone who...
That's impressive stuff. I am semi-obsessed with memory and applying pre-learned results to a problem. So, I am coming to believe that the following is the...
I would love to see your practice spreadsheet, George. I'm still planning to write a program to help me improve by abilities in this area (if I ever get the...
Hi, thanks for your message and for your interesting site. Concerning this calendar training program, would it not be nice to implement more methods of...
There are several Internet booksellers carrying my book, I suggest checking out the British website www.fetchbook.co.uk since they survey over 100 sellers to...
I'll post the Excel version of the practice file to the files section of the group in the next few days. It's far from perfect, but it's good enough for me -...
George, Thank you. I was able to locate a new copy here in the good old USA for $20 shipped..................should be here in 2 days. I will gladly let you...
i have this technique for cubing an integer ending in 7 examples 77^3 = (7*8*9)*100 - ( 77^2-(77*(7+8)+27)) 67^3 = (6*7*8)*100 - ( 67^2-(67*(6+8)+27)) ...
Hi all, a little while ago I came across this group by accident (looking for algorithms for integer factorization), and I have tried to catch up reading...
Thank you for the compliment, Antonio! I just wanted the focus of the Be A Genius* site to be practicable impressive mental feats. I didn't include the...
hello i have this technique for squaring any number ending in 9 79*79 step a) 7*(7+1)=56*100=5600+1=5601 step b) 8*(7+1)=64*10=640 step 3) add 1) and 2)...
If you easily square numbers under 21 you can square the others very easily like this : 79=70+9 (7900=7000+900) 79=100-21 70^2=4900 4900+900=5800 21^2=441 ...
Emmanuel.DUBRULLE@...
Mar 7, 2005 10:05 am
1746
I mean "If you easily square numbers under 21" ... From: DUBRULLE Emmanuel (COMP) Sent: Monday, March 07, 2005 11:05 AM To: 'MentalCalculation@yahoogroups.com'...
Emmanuel.DUBRULLE@...
Mar 7, 2005 10:07 am
1747
I mean "If you easily square numbers under 25" ! ... From: DUBRULLE Emmanuel (COMP) Sent: Monday, March 07, 2005 11:07 AM To: DUBRULLE Emmanuel (COMP);...
Emmanuel.DUBRULLE@...
Mar 7, 2005 10:07 am
1748
... very easily ... Do you use this also for numbers greater than 100? There are probably plenty of ways to do this. My current favorite is the following: 79 =...
Hello there. It seems you and I have quite a lot in common - I also detest the idea of trying to remember too many 'bits & pieces'; I'd much rather treat...
Here is an exemple with higher number ... I also notice that 348 is close to 350 ; 350 = 7 x 50 ; 50-48 = 2 And Then I can do this ; 35*35=1225 2x7= 14 ;...
Emmanuel.DUBRULLE@...
Mar 8, 2005 7:17 am
1751
Hello George, There is a beauty and magic in numbers which would be lost if someone just used memory techniques; my obsession is memory techniques these days;...
Hi folks As promised a few days ago, I have posted my MC practice file to the files section of this group. As I said before, this file is far from perfect but,...
George, Nicely done. Can you now tell me how much time is allowed to do the test and if there is any bonus added to the score for finishing early? Also, are...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the MentalCalculation group. File :...
MentalCalculation@yah...
Mar 9, 2005 3:32 am
1759
Hi there. The total time allowed for the test is 4 hours, the same time allowance as that which is made for the genuine Mental Calculations World Championship...
Thank you for the explanation. Can you answer two more questions for me? What are the average scores for the non winning participants and what is the purpose...
This man find me. http://www.geocities.com/mentalmathandcatlover/ Sincerely Yours, Oleg Stepanov. http://www.lk.net/~stepanov/...
Oleg Stepanov
olegstepanov@...
Mar 12, 2005 5:05 am
1762
To answer you second question first, I believe the purpose of having such simple problems at the start of some of the sections is to make sure that every...
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