19 de marzo de 2007

Problemas interesantes (1)

“Un coleccionista tiene cierta cantidad de piedras preciosas, todas de pesos distintos. Si retira las 3 piedras más pesadas, el peso total de todas las piedras que tenía disminuye en 35%. Si retira, de las piedras restantes, las 3 más livianas, el peso total de dichas piedras restantes disminuye en sus 5/13. ¿Cuántas piedras tenía originalmente el coleccionista?”
Fuente: Los Foros del Rincón Matemático.

1 comentario:

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