Răspuns:
Explicație pas cu pas:
0,(3) = 3/9 = 1/3
0,25 = 25/100 = 1/4
____________
S = suma initiala
Prima zi S/6
rest S - S/6 = 5S/6
A doua zi 1/3*5S/6 = 5S/18
rest 5S/6 - 5S/18 = 15S/18 - 5S/18 = 10S/18 = 5S/9
A treia zi 1/4*5S/9 = 5S/36
rest 5S/9 - 5S/36 = 20S/36 - 5S/36 = 15S/36 = 5S/12
5S/12 = 120 lei
S = 12*120/5 = 288 lei