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  2. Man-hour - Wikipedia

    en.wikipedia.org/wiki/Man-hour

    A man-hour or human-hour is the amount of work performed by the average worker in one hour. [1] [2] It is used for estimation of the total amount of uninterrupted labor required to perform a task. For example, researching and writing a college paper might require eighty man-hours, while preparing a family banquet from scratch might require ten ...

  3. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The Clay Mathematics Institute officially designated the title Millennium Problem for the seven unsolved mathematical problems, the Birch and Swinnerton-Dyer conjecture, Hodge conjecture, Navier–Stokes existence and smoothness, P versus NP problem, Riemann hypothesis, Yang–Mills existence and mass gap, and the Poincaré conjecture at the ...

  4. 10 Hard Math Problems That Even the Smartest People in the ...

    www.aol.com/10-hard-math-problems-even-150000090...

    For now, you can take a crack at the hardest math problems known to man, woman, and machine. ... In September 2019, news broke regarding progress on this 82-year-old question, thanks to prolific ...

  5. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  6. 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.

  7. Can You Solve the ‘A Man Steals $100 From a Shop’ Riddle?

    www.aol.com/solve-man-steals-100-shop-111000916.html

    The man used that $100 to buy $70 worth of stuff, which means the shop owner had to provide $30 in change from the register to complete the transaction. So in the actual transaction, the shop ...

  8. Wage unit - Wikipedia

    en.wikipedia.org/wiki/Wage_unit

    This creates the possibility of falling into a certain misunderstanding. Assuming that income is indeed determined in wage units by these equations, it might be supposed that – income being a quantity in man-hours – the level of employment is likewise determined. But the expression of income in man-hours is purely artificial.

  9. Unitary method - Wikipedia

    en.wikipedia.org/wiki/Unitary_method

    How far does he walk in 7 hours?", one could first calculate how far the man walks in a single hour, as the ratio of the first two givens. 7 miles divided by 2 hours is 3 ⁠ 1 / 2 ⁠ miles per hour. Then, multiplying by the third given, 7 hours, gives the answer as 24 ⁠ 1 / 2 ⁠ miles.

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