MentalCalculation : Mental Calculation

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The topics discussed are for example:
* advanced mental calculation tasks (like extracting roots or multiplying big numbers)
* algorithms
* books about mental calculating
* competitions, achievements and records for mental calculations
* teaching mental calculation at school
* useful computer programs
* using the abacus / soroban
Beginners' questions are welcome, but do not expect to get the solution for your homework here.

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Re: Task for you Good afternoon, Like.. What is meant with this? There is few information in that word. Please more Regards, Willem Bouman Van: Posted - Sun May 12, 2013 3:52 pm	A.W.A.P. Bouman awapbouman Send Email
Re: Task for you Like... 2013/5/12 A.W.A.P. Bouman <awap.bouman@...> ... [Non-text portions of this message have been removed] Posted - Sun May 12, 2013 2:29 pm	Sel��çuk Soner Akg�... ssakgul Send Email
Re: Task for you Good afternoon all, Am I right: I did some logic in the powering and found that the solution could be 2^1363.? Anyhow: if there are more possibilities, 2^1363 Posted - Sun May 12, 2013 2:17 pm	A.W.A.P. Bouman awapbouman Send Email
Re: Task for you The same question with 3 has a bigger answer. Good luck... 2013/5/12 Selçuk Soner Akgül <ssakgul@...> ... -- * 3 BİLİNMEYENL�� DENKLEMLER GÖZ İLE Posted - Sun May 12, 2013 1:36 pm	Sel��çuk Soner Akg�... ssakgul Send Email
Re: Task for you 201318687342850317847419807999357611187094848695324573221595734711770019472614650276030865824638467931286122854842682819201476707334067084631363324162176846103 Posted - Sun May 12, 2013 1:36 pm	Sel��çuk Soner Akg�... ssakgul Send Email
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2003	191	64	147	106	103	24	6	42	15	20	36	5
2002										81	147	190

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