Răspuns :
/___/+15 prima zi
/___/ a doua zi
/___/+15+10 a treia zi
Total 70
70-(15+15+10)=30
30:3=10 a doua zi
10+15=25 prima zi
10+15+10=35 a treia zi
V 10+25+35=70
/___/ a doua zi
/___/+15+10 a treia zi
Total 70
70-(15+15+10)=30
30:3=10 a doua zi
10+15=25 prima zi
10+15+10=35 a treia zi
V 10+25+35=70