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  2. Repeating decimal - Wikipedia

    en.wikipedia.org/wiki/Repeating_decimal

    The repeating sequence of digits is called "repetend" which has a certain length greater than 0, also called "period". [5] In base 10, a fraction has a repeating decimal if and only if in lowest terms, its denominator has any prime factors besides 2 or 5, or in other words, cannot be expressed as 2 m 5 n, where m and n are non-negative integers.

  3. Square triangular number - Wikipedia

    en.wikipedia.org/wiki/Square_triangular_number

    All square triangular numbers have the form , where is a convergent to the continued fraction expansion of , the square root of 2. [ 4 ] A. V. Sylwester gave a short proof that there are infinitely many square triangular numbers: If the n {\displaystyle n} th triangular number n ( n + 1 ) 2 {\displaystyle {\tfrac {n(n+1)}{2}}} is square, then ...

  4. List of refractive indices - Wikipedia

    en.wikipedia.org/wiki/List_of_refractive_indices

    Some representative refractive indices; Name of material λ (nm) Refractive index no. n Reference Vacuum: 1 (by definition) Air at STP: 1.000273 [citation needed]Gases at 0 °C and 1 atm

  5. Wikipedia : Reliable sources/Noticeboard/Archive 301

    en.wikipedia.org/wiki/Wikipedia:NEWSBREAK

    Now I fully agree that I'd rather pull that info from a secondary/third-party source repeating the information from the crowdfunding page, but that's not always possible. -- M asem ( t ) 14:42, 17 June 2020 (UTC)

  6. John 1:36 - Wikipedia

    en.wikipedia.org/wiki/John_1:36

    Theophylact of Ohrid: " Looking he saith, as if signifying by his looks his love and admiration for Christ." [3]Augustine: "John was the friend of the Bridegroom; he sought not his own glory, but bare witness to the truth.

  7. 1p36 deletion syndrome - Wikipedia

    en.wikipedia.org/wiki/1p36_deletion_syndrome

    1p36 deletion syndrome is a congenital genetic disorder characterized by moderate to severe intellectual disability, delayed growth, hypotonia, seizures, limited speech ability, malformations, hearing and vision impairment, and distinct facial features.

  8. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).

  9. Craps - Wikipedia

    en.wikipedia.org/wiki/Craps

    [5]: 7–8 Hazard allows the dice shooter to choose any number from five to nine as their "main" number; [6]: 168 in a pamphlet published in 1933, [7] Edward Tinker claimed that Marigny simplified the game by making the main always seven, [5] which is the mathematically optimal choice, i.e., the choice with the lowest disadvantage for the shooter.