Răspunsuri

2014-10-24T15:17:08+03:00
4+44+444+...+444444444=4(1+11+111+...+111111111)=4*123456789=493827156.
e interesant ca in numarul 4*123456789 exista toate cifrele de la 1 la 9 fara repetitie
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