Hi there. Â There are many ways to improve speed & accuracy in calculations, but the best - and the most obvious - is to practice. You can find many books &...
Dear calculating friends, Having read George Lane's message I can only confirm what he writes "all forms of calculations are interlinked etc". Being advised by...
Hello all, once again. Â Willem Bouman has made a very imp[ortant point here: If you assemble your own questions, you have an unfair advantage over everyone...
Hi John, im sorry again but im a newbie in this world, taking 2 numbers i havent got experience and i dont know if its really more effective, in my case with 2...
Dear calculator friends, For generating random dates there is a program called K-train 2002, which is if I am well informed, freeware. For training in calendar...
Thanx for these informations. And there is a file for Calender Date Calculation named Takvim_International.ods. You can open it by OpenOffice.org Calc free...
Hello. Nowadays, I can multiply 3 or 4 digit numbers without much trouble, but not too quickly, it depends on my memory, too. I try to multiply always in 2...
Hello. Nowadays, I can multiply 3 or 4 digit numbers without much trouble, but not too quickly, it depends on my memory, too. I try to multiply always in 2...
Dear Mr. Matheus, Thank you for the very good tip, in the meantime I visited the site twice and will certainly do this many more times. Regards, Willem Bouman ...
Hi Willem, Thanks for this useful infos. I think it will be great help for me. But pls tell me how I can find the K-train 2002? I google it but all the results...
For anyone interested, excel can make random dates. Just google excel random dates for examples. I think it just makes a random number and then formats it as...
Dear Calculating friends, Owing to Jan van Koningsveld I can train my CC with the K-train program of Mr. Karl Sequoia. Hereunder you find Mr Sequoias answer to...
Hi Albert, thanks for your words, im sorry but i dont have any method, i only take one number, if you want you can read my post here maybe there are anything...
Well done Jan, and congrats ! I have some questions: You are able to multiply 8X8 in less than 20 seconds. In your opinion what are the human's limits for...
Dear Members Is it possible to say whether a remainder exists in a division sum without actually dividing the numbers.If yes pl help me.It may include some...
Hi! There is a technique that I use that works very well with your example. Firstly we observe 367 cannot be divided by 2 or 5. So it has not common facotr...
Hi Andy, Am I interpreting this correctly?: With 35100 (or 351 x 100), that 100 is 10 x 10 . We know that a number which ends with 00 is divisible by '10 x...
Hi Mike, Ok, here's another exampe is 52342 divisible by 643? Obviously this time I cannot do anything quite so easy as subtract 643, and get a number ending...
Hi folks, thought I'd put the keyboard to use on this one.  There's an extension to this technique, which helps to analyse even numbers and those ending in...
Dear friends, To be seen on internet google: "Hart en ziel filmpje Willem Bouman" , in which I give explanation about the cross method and "Willem Bouman...
English subtitles would make this videos useful, maybe. ________________________________ From: A.W.A.P. Bouman <awap.bouman@...> To: mental calculation...
Dear Mr, Salizar, I know. There is however a problem: in our country we speak Dutch and the names are titles of TV programs. Another problem: I have no idea...
I´am from Cuba, I have 26 years and I practice mental Calculation, I really appreciate belong to this group, this is my web site ...
Freddy
freddy03032@...
Mar 20, 2009 2:56 pm
3003
Dear friends, we have date for the next Speed Memory World Championship: - Date: 24th and 25th of July at 10,00 hours in the morning. - Place: school...
I have recited pi to 22 544 digits. I need some wittnesses. Do you want to help me with this ? http://www.pi-world-ranking-list.com/rules/index.html I live in...
Thank for reply Mr. Willem Bouman, I'll have to find some Dutch people, but, in my country, that's going to take some time, mean while congrats for the...
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