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  2. Rule of 78s - Wikipedia

    en.wikipedia.org/wiki/Rule_of_78s

    The denominator of a Rule of 78s loan is the sum of the integers between 1 and n, inclusive, where n is the number of payments. For a twelve-month loan, the sum of numbers from 1 to 12 is 78 (1 + 2 + 3 + . . . +12 = 78). For a 24-month loan, the denominator is 300. The sum of the numbers from 1 to n is given by the equation n * (n+1) / 2.

  3. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    An expression like 1/2x is interpreted as 1/(2x) by TI-82, [3] as well as many modern Casio calculators [36] (configurable on some like the fx-9750GIII), but as (1/2)x by TI-83 and every other TI calculator released since 1996, [37] [3] as well as by all Hewlett-Packard calculators with algebraic notation.

  4. Calculation (card game) - Wikipedia

    en.wikipedia.org/wiki/Calculation_(card_game)

    Calculation (also known as Broken Intervals, [1] Hopscotch [2] and Four Kings Solitaire [3]) is a solitaire card game played with a standard pack of 52 cards. [4] It is part of the Sir Tommy family of patience games. It has its origin in France, where it is known as La Plus Belle. [5]

  5. Rule of 72 - Wikipedia

    en.wikipedia.org/wiki/Rule_of_72

    An early reference to the rule is in the Summa de arithmetica (Venice, 1494. Fol. 181, n. 44) of Luca Pacioli (1445–1514). He presents the rule in a discussion regarding the estimation of the doubling time of an investment, but does not derive or explain the rule, and it is thus assumed that the rule predates Pacioli by some time.

  6. Chopsticks (hand game) - Wikipedia

    en.wikipedia.org/wiki/Chopsticks_(hand_game)

    The game's scores are tracked on the fingers of both hands. Chopsticks (sometimes called Calculator, Splits, or just Sticks) [citation needed] is a hand game for two or more players, in which players extend a number of fingers from each hand and transfer those scores by taking turns tapping one hand against another.

  7. Aces and eights (blackjack) - Wikipedia

    en.wikipedia.org/wiki/Aces_and_eights_(blackjack)

    Two aces and two eights in a standard deck of playing cards.. Splitting aces and eights is part of blackjack basic strategy.Rules vary across gambling establishments regarding resplitting, doubling, multiple card draws, and the payout for blackjack, and there are conditional strategic responses that depend upon the number of decks used, the frequency of shuffling and dealer's cards.

  8. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    Engineer using a slide rule, with mechanical calculator in background, mid 20th century. A more modern form of slide rule was created in 1859 by French artillery lieutenant Amédée Mannheim, who was fortunate both in having his rule made by a firm of national reputation, and its adoption by the French Artillery. Mannheim's rule had two major ...

  9. Merton's portfolio problem - Wikipedia

    en.wikipedia.org/wiki/Merton's_portfolio_problem

    Consumption cannot be negative: c t ≥ 0, [2] [3] while π t is unrestricted (that is borrowing or shorting stocks is allowed). Investment opportunities are assumed constant, that is r , μ , σ are known and constant, in this (1969) version of the model, although Merton allowed them to change in his intertemporal CAPM (1973).