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  2. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    There are some examples of year numbers after 1000 written as two Roman numerals 1–99, e.g. 1613 as XVIXIII, corresponding to the common reading "sixteen thirteen" of such year numbers in English, or 1519 as X XIX as in French quinze-cent-dix-neuf (fifteen-hundred and nineteen), and similar readings in other languages. [37]

  3. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.The number π appears in many formulae across mathematics and physics.

  4. Neutron - Wikipedia

    en.wikipedia.org/wiki/Neutron

    The atomic number determines the chemical properties of the atom, and the neutron number determines the isotope or nuclide. [7]: 4 The terms isotope and nuclide are often used synonymously, but they refer to chemical and nuclear properties, respectively. [7]: 4 Isotopes are nuclides with the same atomic number, but different neutron number.

  5. Celts - Wikipedia

    en.wikipedia.org/wiki/Celts

    Due to the large number of these present in some burials, it is thought they had a relatively high monetary value, and could be used for "day to day" purchases. Low-value coinages of potin , a bronze alloy with high tin content, were minted in most Celtic areas of the continent and in South-East Britain prior to the Roman conquest of these lands.

  6. Yoga - Wikipedia

    en.wikipedia.org/wiki/Yoga

    A number of yoga texts, such as the Hatha Yoga Pradipika, the Yoga Kundalini and the Yoga Tattva Upanishads, have borrowed from (or frequently refer to) the Yoga Yajnavalkya. [193] It discusses eight yoga asanas (Swastika, Gomukha, Padma, Vira, Simha, Bhadra, Mukta and Mayura), [ 194 ] a number of breathing exercises for body cleansing, [ 195 ...

  7. Democracy - Wikipedia

    en.wikipedia.org/wiki/Democracy

    The number of nations 1800–2003 scoring 8 or higher on Polity IV scale, another widely used measure of democracy [needs update] 20th-century transitions to liberal democracy have come in successive " waves of democracy ", variously resulting from wars, revolutions, decolonisation , and religious and economic circumstances. [ 122 ]

  8. Mobile network codes in ITU region 3xx (North America)

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    iDEN 800: iDEN shut down January 2016 302: 361: Telus: Telus Mobility: Not operational: CDMA 800 / CDMA 1900: CDMA shut down 31 May 2017; [41] MNC withdrawn [31] 302: 370: Fido: Fido Solutions (Rogers Wireless) Operational: MVNO: former Microcell Telecommunications 302: 380: Keewaytinook Mobile: Keewaytinook Okimakanak Mobile: Operational: UMTS ...