Question

Ina,Vlad si Dan au colectionat 875 de timbre.Vlad a colectionat cu 45 de timbre mai putine decat jumatatea din numarul timbrelor colectionate de Ina si cu 27 de timbre mai mullte decat Dan.Cate timbre a colectionat fircare copil?

Answer 1

i-nr timbre Ina
v-nr timbre Vlad
d-nr timbre Dan

i+v+d=875
v=i:2-45
v=d+27

Ina    |---------------|---------------|}
Vlad  |--------|.45..|                   }875
Dan  |---|.27.|                          }
Cat ar fi suma daca Dan si Vlad ar avea impreuna cat Ina? (adica daca Vlad = Dan= jumatate din Ina)
875+45+27+45=875+117=992
Cat reprezinta un segment?
992:4=248
Cate timbre are Ina?
2×248=496
Cate timbre are Vlad?
248-45=203
Cate timbre are Dan?
203-27=176
verificare 496+203+176=875
ina are 496 timbre, Vlad are 203, iar Dan are 176 timbre.