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Cate nr natural de cel mult trei cifre impartite  la 20  dau restul 5.aflati suma acestora.


Răspuns :

25+45+65+85+105+125+1+205+225+245+265+285+305+325+345+365+385+405+425+445+465+485+505+525+545+565+585+605+625+645+665+685+705+725+745+765+785+805+825+845+865+885+905+925+945+965+985=24251
sper ca e bn ! :D