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  2. Tally marks - Wikipedia

    en.wikipedia.org/wiki/Tally_marks

    Tally marks, also called hash marks, are a form of numeral used for counting. They can be thought of as a unary numeral system. They are most useful in counting or tallying ongoing results, such as the score in a game or sport, as no intermediate results need to be erased or discarded. However, because of the length of large numbers, tallies ...

  3. Change-making problem - Wikipedia

    en.wikipedia.org/wiki/Change-making_problem

    The change-making problem addresses the question of finding the minimum number of coins (of certain denominations) that add up to a given amount of money. It is a special case of the integer knapsack problem , and has applications wider than just currency.

  4. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    Counting assigns a natural number to each object in a set, starting with 1 for the first object and increasing by 1 for each subsequent object. The number of objects in the set is the count. This is also known as the cardinality of the set. Counting can also be the process of tallying, the process of drawing a mark for each object in a set.

  5. Mathcounts - Wikipedia

    en.wikipedia.org/wiki/Mathcounts

    The Mathcounts Competition Series spread quickly in middle schools, and today it is the best-known middle school mathematics competition. [6] In 2007 Mathcounts launched the National Math Club as a noncompetitive alternative to the Competition Series. In 2011, Mathcounts launched the Math Video Challenge Program, which was discontinued in 2023 ...

  6. 'I Lost 135 Pounds When I Started Counting Macros And ... - AOL

    www.aol.com/lost-135-pounds-started-counting...

    Making one small change at a time, Sarah L. started counting macros to overhaul her diet and added HIIT and barbell workouts plus yoga to lose weight. 'I Lost 135 Pounds When I Started Counting ...

  7. Descartes' rule of signs - Wikipedia

    en.wikipedia.org/wiki/Descartes'_rule_of_signs

    The number of positive real roots is at most the number of sign changes in the sequence of polynomial's coefficients (omitting zero coefficients), and the difference between the root count and the sign change count is always even. In particular, when the number of sign changes is zero or one, then there are exactly zero or one positive roots.

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