Systems for Calculating Calendar Dates

47

September 1, 2019

Modular Arithmetic and Riemann surfaces

15

August 30, 2019

Hectoc Strategies

6

August 28, 2019

Creatively sneaking square roots into HECTOC

1

August 28, 2019

Any gifted mental calculators in stock trading? Do you use it in your career?

3

August 27, 2019

3 difficult questions of Mental Calculations World Championship

32

August 27, 2019

Calculate log43 and log85 mentally

4

August 26, 2019

I dont understand George Parker Bidder's Logarithms

11

August 19, 2019

An obvious trick (combo) 2 digits with last 2 numbers adding to 10

1

August 19, 2019

Calculated 9472 × 3367 in 1min 47 sec

27

August 18, 2019

Who is the best mental calculator?

10

August 15, 2019

Duplex method for squaring numbers very quickly

13

August 15, 2019

Roots decimals

28

August 14, 2019

Learning Rate

5

August 14, 2019

On The Nature Of Numbers

42

August 10, 2019

How to calculate antilogarithms in a easy way

20

August 9, 2019

Multiplication with parabolas

2

August 9, 2019

Soroban resource

1

August 8, 2019

How to calculate antilogarithm mentally

4

February 14, 2019

How to Prove integers with sum of 10 trick? Stuck on something obvious

35

August 5, 2019

Complex Factors?

7

August 5, 2019

And now for something truly trivial

10

August 5, 2019

A Generating Function for all the Square numbers

1

August 3, 2019

Any of you math geeks have a favourite tex template for keeping your stuff?

1

July 30, 2019

A very small thought

19

July 29, 2019

Having a little fun with the basics tonight

26

July 27, 2019

Playing with Numbers.. A few different ways of looking at the same thing

2

July 26, 2019

Patterns in the last two digits of Squares... Dimensions and Geometry

7

July 17, 2019

Looking for a Mental Math Training App

7

July 17, 2019

Mental Math & Bayesian Statistics

1

July 11, 2019
