Răspuns:
a = primul numar
b = al doilea numar
c= al treilea numar
a /------/
b /------/------/
c /------/------/------/------/
a + b + c = 105
7 segmente = 105
1 segment = 105 : 7 = 15
a = 1 segment = 15
b = 2 segmente = 2 × a = 15 × 2 = 30
c = 4 segmente = 2 × b = 30 × 2 = 60