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  2. 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.

  3. Algebra - Wikipedia

    en.wikipedia.org/wiki/Algebra

    Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.

  4. 1/4 + 1/16 + 1/64 + 1/256 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1/4_%2B_1/16_%2B_1/64_%2B...

    Archimedes' figure with a = ⁠ 3 / 4 ⁠ In mathematics, the infinite series ⁠ 1 / 4 ⁠ + ⁠ 1 / 16 ⁠ + ⁠ 1 / 64 ⁠ + ⁠ 1 / 256 ⁠ + ⋯ is an example of one of the first infinite series to be summed in the history of mathematics; it was used by Archimedes circa 250–200 BC. [1]

  5. Attention deficit hyperactivity disorder - Wikipedia

    en.wikipedia.org/wiki/Attention_deficit...

    Attention deficit hyperactivity disorder (ADHD) [1] is a neurodevelopmental disorder characterized by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally-inappropriate.

  6. Kay Bailey Hutchison - Wikipedia

    en.wikipedia.org/wiki/Kay_Bailey_Hutchison

    Kay Bailey Hutchison (born Kathryn Ann Bailey; July 22, 1943) is an American attorney, television correspondent, politician, diplomat, and was the 22nd United States Permanent Representative to NATO from 2017 until 2021.

  7. Wallace Stevens - Wikipedia

    en.wikipedia.org/wiki/Wallace_Stevens

    Wallace Stevens (October 2, 1879 – August 2, 1955) was an American modernist poet. He was born in Reading, Pennsylvania, educated at Harvard and then New York Law School, and spent most of his life working as an executive for an insurance company in Hartford, Connecticut.

  8. Risk - Wikipedia

    en.wikipedia.org/wiki/Risk

    Firefighters are exposed to risks of fire and building collapse during their work.. In simple terms, risk is the possibility of something bad happening. [1] Risk involves uncertainty about the effects/implications of an activity with respect to something that humans value (such as health, well-being, wealth, property or the environment), often focusing on negative, undesirable consequences. [2]

  9. India - Wikipedia

    en.wikipedia.org/wiki/India

    According to the 2011 census, there were 10.1 million child labourers in the country, a decline of 2.6 million from 12.6 million in 2001. [ 351 ] Since 1991, economic inequality between India's states has consistently grown: the per-capita net state domestic product of the richest states in 2007 was 3.2 times that of the poorest. [ 352 ]