RetoCH

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RetoCH's picture
About me: 

interested in a few topics, mainly in mental calculation.

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Country: 
Switzerland

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Member for
4 years 10 months

Latest Posts and Comments

Title Type Comments Updated
Speed calculators: What is really useful to memorize? Forum topic 32 3 years 6 months ago
Boris Konrad, RĂ¼diger Gamm, and Others on Super Brain of China Forum topic 10 3 years 7 months ago
Fastest n'th root technique / Solving any equation in single line Mentally Forum topic 25 3 years 7 months ago
Trick for squaring 2 digit numbers above 50 Forum topic 7 2 years 5 months ago
Multiplication tables revisited Forum topic 14 1 year 3 months ago
Starting My Memory Journey Forum topic 2 4 years 1 week ago
Books on creating puzzles? Or, creating codes? Forum topic 5 4 years 1 week ago
Multiplication tables and 10-based numerical system Forum topic 18 2 years 2 months ago
General discussion of mental maths Forum topic 24 4 months 6 days ago
Analyzing RĂ¼diger Gamms performance (division by 109) Forum topic 11 3 years 6 months ago
How do you memorize numbers of varoius length? Forum topic 9 4 years 6 months ago
How do you calculate higher powers of numbers? Forum topic 28 1 year 4 months ago
Hello from Switzerland Forum topic 3 4 years 10 months ago
New Forum Section for Mind Puzzles Forum topic 7 3 years 9 months ago
Memorizing Pi Forum topic 14 4 years 10 months ago
Secrets of Mental Math Forum topic 66 3 years 1 month ago