Răspuns :
Daca bunica are 60 iar toti trei au 110 atunci mama si David au 50(adica 110-60) ani.
Mama |—|—I—|—|
David |—|
Impreuna au 50 ani
Parti egale =4+1=5
Ani are David=50:5=10
Ani are mama= 50-10=40
R:bunica are 60
Mama are 40
David are 10
Mama |—|—I—|—|
David |—|
Impreuna au 50 ani
Parti egale =4+1=5
Ani are David=50:5=10
Ani are mama= 50-10=40
R:bunica are 60
Mama are 40
David are 10