Today's problem: The sum of the numbers...


	Thursday, 13 april 2017

The sum of the numbers...

Proposed by batranetupetre Offline


(5 comments)	2.936 times displayed

Aflati suma tuturor cifrelor cu care se scriu numerele de la 1 la 2017.


View the Solution Formez grupele (1,1998),(2,1997),...(999,1000) , iar numerele 1999, 2000,2001,...2017 le socotim separat. Suma cifrelor in fiecare grupa se face fara trecere peste ordin si este 28. Avem 1000 de grupe cu suma 28 si suma cifrelor numerelor de la 2000 la 2017, care este 117. Prin urmare suma este 28117.

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