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  2. Taxman (mathematical game) - Wikipedia

    en.wikipedia.org/wiki/Taxman_(mathematical_game)

    The taxman may or may not lose points for missing factors or choosing incorrectly, and the tax payer may or may not be able to steal a factor that the taxman misses. [4] [5] [6] [8] In some versions, there is the option to remove one or more numbers from the board before the game starts. [4] [5] [6]

  3. Missing dollar riddle - Wikipedia

    en.wikipedia.org/wiki/Missing_dollar_riddle

    There seems to be a discrepancy, as there cannot be two answers ($29 and $30) to the math problem. On the one hand it is true that the $25 in the register, the $3 returned to the guests, and the $2 kept by the bellhop add up to $30, but on the other hand, the $27 paid by the guests and the $2 kept by the bellhop add up to only $29.

  4. Noetic Learning math contest - Wikipedia

    en.wikipedia.org/wiki/Noetic_Learning_Math_Contest

    The Noetic Learning math contest was founded in 2007 by Li Kelty. The company is based in Overland Park, Kansas. [6] The contest has grown over the years, with participants from various schools across the United States. [18] In Spring 2023, more than 35,000 students nationwide participated in the Noetic Learning Math Contest. [19]

  5. K-5 (education) - Wikipedia

    en.wikipedia.org/wiki/K-5_(education)

    K-5 (pronounced "kay through five") is an American term for the education period from kindergarten to fifth grade. It receives equal amounts of criticism and support in the educational industry. It receives equal amounts of criticism and support in the educational industry.

  6. Coupon collector's problem - Wikipedia

    en.wikipedia.org/wiki/Coupon_collector's_problem

    In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...

  7. Gratuity - Wikipedia

    en.wikipedia.org/wiki/Gratuity

    Thus, the standard tip in Mexico is 11.5% of the pre-tax bill which equates to 10% after tax in most of the Mexican territory, except in special lower tax stimulus economic zones. [ 97 ] [ 98 ] Tips to taxi drivers are unusual in Mexico, but drivers used to ask for them from tourists, knowing that is common in other countries.