Mental Calculation, Mathematics, and Puzzles


Topic Replies Activity
Stephen Hawking and Math 13 November 18, 2018
Pi Art - Martin Krzywinski 2 November 11, 2018
Hexadecimal (or Binary) Digits of Phi 3 November 9, 2018
"Polynesian people used binary numbers 600 years ago" 1 October 31, 2018
8th Mental Calculation World Cup 2018 6 October 17, 2018
MSO 2018 - Mental calculations questions paper (Pdf) and Final results 2 September 12, 2018
Benjamin's 2x2 Method of Multiplication works for also for 3x3? 4 August 17, 2018
Which is greater? a^b or b^a? 4 June 27, 2018
The importance of mental calculation 3 June 19, 2018
Granth Thakkar's world record for 20 digit multiplication 12 June 10, 2018
How to write faster 4 April 27, 2018
Fastest way to learn mental math 8 April 6, 2018
Mentally calculating logarithms 24 March 29, 2018
What Mental Calculation method should I choose? 6 March 28, 2018
New Years resolutions slowly engaging 10 February 23, 2018
Fastest Methods At Mental Math And Your Personal Timings 2 February 22, 2018
N Roots 2 February 7, 2018
Do you want to learn soroban and flash anzan? Click here for classes online with record holder in memoriad: Jeonghe Lee! 13 January 21, 2018
Any good learning materials on the abacus method? 4 January 14, 2018
Hello world 2 January 13, 2018
Calculating logarithms 2 January 12, 2018
Flash Anzan - How Much Time Does It Take To Master 4 December 17, 2017
Revisiting 13/97 1 December 8, 2017
Fast division by 23 8 December 8, 2017
Study Finds Chess Significantly Improves Creative and Critical Thinking Skills 9 November 21, 2017
Dividing by full reptend primes 6 November 20, 2017
Calculating odds in poker? 4 November 18, 2017
Soroban - can I use my left hand? 3 October 24, 2017
More division tricks. Numbers ending in 1 or 2 5 October 16, 2017
does the abacus have a real advantage ? 8 October 14, 2017