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  2. Mental abacus - Wikipedia

    en.wikipedia.org/wiki/Mental_abacus

    Mental calculation is said to improve mental capability, increases speed of response, memory power, and concentration power. Many veteran and prolific abacus users in China, Japan, South Korea, and others who use the abacus daily, naturally tend to not use the abacus any more, but perform calculations by visualizing the abacus.

  3. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies (such as pencil and paper) or devices such as a calculator. People may use mental calculation when computing tools are not available, when it is faster than other means of calculation (such as conventional educational institution ...

  4. Brain Age: Train Your Brain in Minutes a Day! - Wikipedia

    en.wikipedia.org/wiki/Brain_Age:_Train_Your_Brain...

    Calculations × 20, which is the same as the one found in the Brain Age Check. Mental agility exercise with a total of simple calculation 20 questions that includes addition, subtraction, and multiplication. Calculations × 100, which is the same as Calculations × 20, although with 100 questions instead of 20. There is a hard mode that ...

  5. Category:Games of mental skill - Wikipedia

    en.wikipedia.org/wiki/Category:Games_of_mental_skill

    Аԥсшәа; العربية; বাংলা; Башҡортса; Беларуская (тарашкевіца) Български; Bosanski; Чӑвашла

  6. 24 (puzzle) - Wikipedia

    en.wikipedia.org/wiki/24_(puzzle)

    The original version of 24 is played with an ordinary deck of playing cards with all the face cards removed. The aces are taken to have the value 1 and the basic game proceeds by having 4 cards dealt and the first player that can achieve the number 24 exactly using only allowed operations (addition, subtraction, multiplication, division, and parentheses) wins the hand.

  7. Krypto (game) - Wikipedia

    en.wikipedia.org/wiki/Krypto_(game)

    A spread of Krypto cards: players must find a way to calculate 12 using the numbers 5, 19, 8, 3 and 6. Krypto is a card game designed by Daniel Yovich in 1963 and published by Parker Brothers and MPH Games Co. [1] It is a mathematical game that promotes proficiency with basic arithmetic operations.

  8. Brain Age 2: More Training in Minutes a Day! - Wikipedia

    en.wikipedia.org/wiki/Brain_Age_2:_More_Training...

    In Japan, the game was the best-selling game during its debut month of January 2005, selling 1,084,857 units. [37] By March 2006, the game sold 1.7 million copies. [ 38 ] For the week of May 15–21, 2006, the game was the 2nd best-selling game, with 62,000 units sold that week and 2,281,000 copies since its release. [ 39 ]

  9. Mind sport - Wikipedia

    en.wikipedia.org/wiki/Mind_sport

    The first major use of the term was as a result of the Mind Sports Olympiad in 1997. [1] The phrase had been used prior to this event such as backgammon being described as a mind sport by Tony Buzan in 1996; Tony Buzan was also a co-founder of the Mind Sports Olympiad. [2]