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  2. List of unsolved problems in mathematics - Wikipedia

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

    Lists of unsolved problems in mathematics Various mathematicians and organizations have published and promoted lists of unsolved mathematical problems. In some cases, the lists have been associated with prizes for the discoverers of solutions.

  3. Missing dollar riddle - Wikipedia

    en.wikipedia.org/wiki/Missing_dollar_riddle

    Missing dollar riddle The missing dollar riddle is a famous riddle that involves an informal fallacy. It dates to at least the 1930s, although similar puzzles are much older. [1]

  4. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The Millennium Prize Problems are seven well-known complex mathematical problems selected by the Clay Mathematics Institute in 2000. The Clay Institute has pledged a US$ 1 million prize for the first correct solution to each problem.

  5. Collatz conjecture - Wikipedia

    en.wikipedia.org/wiki/Collatz_conjecture

    The Collatz conjecture [a] is one of the most famous unsolved problems in mathematics. The conjecture asks whether repeating two simple arithmetic operations will eventually transform every positive integer into 1. It concerns sequences of integers in which each term is obtained from the previous term as follows: if the previous term is even, the next term is one half of the previous term. If ...

  6. Scientists find new major cause of inflammatory bowel disease

    www.aol.com/lifestyle/scientists-major-cause...

    Scientists have identified a new genetic mechanism that drives the development of inflammatory bowel disease (IBD) and other autoimmune or inflammatory conditions.

  7. Hilbert's problems - Wikipedia

    en.wikipedia.org/wiki/Hilbert's_problems

    Nature and influence of the problems Hilbert's problems ranged greatly in topic and precision. Some of them, like the 3rd problem, which was the first to be solved, or the 8th problem (the Riemann hypothesis ), which still remains unresolved, were presented precisely enough to enable a clear affirmative or negative answer.

  8. Fermi problem - Wikipedia

    en.wikipedia.org/wiki/Fermi_problem

    In physics or engineering education, a Fermi problem (or Fermi quiz, Fermi question, Fermi estimate ), also known as a order-of-magnitude problem (or order-of-magnitude estimate, order estimation ), is an estimation problem designed to teach dimensional analysis or approximation of extreme scientific calculations. Fermi problems are usually back-of-the-envelope calculations. The estimation ...

  9. ‘Stresslaxing’: Why Trying to Relax Can Stress You Out - AOL

    www.aol.com/lifestyle/stresslaxing-why-trying...

    Stressing out over needing to relax can make anxiety worse, leaving you feeling ‘stresslaxed.’ Here’s what to know.