Editing 15678

Revision as of 16:33, 13 January 2024 by Paul Matei (talk | contribs) (Pagină nouă: '''14441 (Constantin Apostol, Rm. Sărat)''' ''Arătați că oricare ar fi cifrele '' <math>a</math> '' și <math>b</math>, numărul <math>\overline{ab15}</math> are un număr par de divizori naturali.'' '''Soluție:''' ''Se știe că un număr natural cu un număr impar de divizori este pătrat perfect.De asemenea, un pătrat perfect care are cifra unităților 5 are cifra zecilor 2.Cu acestea, dacă presupunem că numărul <math>\overline{ab15}</math> are un număr i...)
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