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7 is the only number D for which the equation 2 n − D = x 2 has more than two solutions for n and x natural. In particular, the equation 2 n − 7 = x 2 is known as the Ramanujan–Nagell equation. 7 is one of seven numbers in the positive definite quadratic integer matrix representative of all odd numbers: {1, 3, 5, 7, 11, 15, 33}. [19] [20]
(June 2020) Click [show] for important translation instructions. View a machine-translated version of the Spanish article. Machine translation, like DeepL or Google Translate , is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy ...
The game of astronomical tables, from Libro de los juegos. The Libro de los juegos (Spanish: "Book of games"), or Libro de axedrez, dados e tablas ("Book of chess, dice and tables", in Old Spanish), was a Spanish treatise of chess which synthesized the information from other Arabic works on this same topic, dice and tables (backgammon forebears) games, [1] commissioned by Alfonso X of Castile ...
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Typically, Ilocanos use native numbers for one through 10, and Spanish numbers for amounts of 10 and higher. Specific time is told using the Spanish system and numbers for hours and minutes, for example, Alas dos/A las dos (2 o'clock). For dates, cardinal Spanish numbers are the norm; for example, 12 (dose) ti Julio/Hulio (the twelfth of July).
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View a machine-translated version of the Spanish article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.
First page of a 1555 version of the Siete Partidas, as annotated by Gregorio López.. The Siete Partidas (Spanish pronunciation: [ˈsjete paɾˈtiðas], "Seven-Part Code") or simply Partidas, was a Castilian statutory code first compiled during the reign of Alfonso X of Castile (1252–1284), with the intent of establishing a uniform body of normative rules for the kingdom.