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Viginti quinque
numerus naturalis / From Wikipedia, the free encyclopedia
Viginti quinque, seu quinque et viginti (numeris Arabicis 25, Romanis XXV, Graecis ΚΕʹ) est numerus naturalis et impar inter 24 et 26. Forma binaria est 11001.
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25 est numerus quadratus, cuius resolutio in factores primos est 52; etiam est summa duorum quadratorum, 32 + 42. 25 est hypotenusa triadis Pythagoreae primitivi: 252 = 72 + 242.