Probleme de matematica pentru gimnaziu: Rezolva si tu problema de astazi

Dupa ce sambata realitatea.net v-a propus o problema destul de buclucasa de clasa a VII, acum va testeaza logica cu o problema data elevilor din ultimii doi ani de gimnaziu la concursul Cangurul 2011.Iata problema:O persoana a tras cu arcul la tinta (pe figura sunt reprezentate punctajele fiecarei zone). A doua zi ea si-a amintit doar ca a obtinut in total 99 puncte, ca a lovit zonele de 5 puncte si 7 puncte cu acelasi numar de sageti si ca a ratat tinta in exact 25% din cazuri.De cate ori a tras ea la tinta?A) 11 B) 16 C) 17 D) 20 E) 24Vezi raspunsurile la probleme pe site-ul Realitatea.net.Sursa foto: tecuci.eu

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