About the Mental Calculation, Mathematics, and Puzzles category

1

October 27, 2018

Memoriad Addition Task example

8

March 28, 2020

Books on creating puzzles? Or, creating codes?

7

March 27, 2020

Why I give up mental arithmetic

8

March 10, 2020

Is Anyone Using Kaktovik Iñupiaq Numerals to Speed up Their Math?

32

March 6, 2020

Maths ...You would consider Insanity

3

March 4, 2020

Looking for a Mental Math Training App

7

July 17, 2019

Katherine Johnson Dies at 101; Mathematician Broke Barriers at NASA

1

February 24, 2020

Stuck in rubiks cube. Only last two corner pieces are interchanged.

4

February 24, 2020

Willem Boumans new world record

5

February 11, 2020

How to calculate the day of any given date

3

February 4, 2020

Memoriad Additions: how to solve it quickly? Part 2

2

February 3, 2020

38 + 85 by Finger Maths?

9

February 2, 2020

The importance of mental calculation

4

February 1, 2020

Memoriad Additions: how to solve it quickly?

11

February 1, 2020

"Left to Right'' or "CrossMultiplication''. Which one is better?

15

January 21, 2020

Memoriad mental addition of ten 10digit numbers

5

January 19, 2020

Cross multiplication: How to multiply 3+ digit numbers?

17

January 17, 2020

9th Mental Calculation World Cup 2020

1

January 17, 2020

Help me to memorize (stock) numbers composed by more than 5 digits

9

January 8, 2020

9307 × 7992 by Soroban?

5

January 8, 2020

Alphabetical puzzle

4

December 30, 2019

A very easy mentally way to calculate logarithm

1

December 2, 2019

How to solve this Soroban addition?

7

December 17, 2019

What are your books about mental calculation?

3

December 14, 2019

Rinne Tsujikubo. 13 years old Japanese girl

9

December 14, 2019

De kunst van het hoofdrekenen (Art of Mental Calculation)

5

December 5, 2019

An alternative way to mentally calculate LOGARITHMS and ANTILOGARITHMS

1

December 3, 2019

Mentally calculating trigonometric values

1

December 2, 2019

Calculating squares and higher powers using division and addition

12

November 30, 2019
