Răspunsuri

2014-03-23T11:52:11+02:00
2014-03-23T12:13:25+02:00

 \frac{1}{4}  · papagali galbeni  =   \frac{2}{3}  · papagali verzi
 
Verificare: Papagali verz + papagali galbeni = 77