Răspuns:
a=2·3=>a=6
b=2·3³=>b=2·27=>b=54
Mg=√a·b=>Mg=√6·54=>Mg=√324=>Mg=18
Ma=(a=b)/2=>Ma=(6+54)/2=>Ma=60/2=>Ma=30
Ma-Mg=30-18=12 (adevarat)
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x=suma initiala
x/2 cheltuie in prima zi
²⁾x-x/2=(2x-x)/2=x/2 rest
x/2·1/2=x/4 cheltuie a2a zi
100 lei cheltuie a3a zi
²⁾x/2+x/4+⁴⁾100=⁴⁾x
2x+x+400=4x
400=4x-x
x=400 suma initiala
400:2=200 lei cheltuie in prima zi
400:4=100 lei cheltuie a2a zi
100 lei cheltuie a3a zi
200+100+100=400 lei a cheltuit Oana
