Grafic
a |--------|
b |--------|-2-| } 36
c |--------|-2-|-2-|
d |--------|-2-|-2-|-2-|
2 × 6 = 12
36 - 12 = 24
24 : 4 = 6
a = 6
b = 6 + 2 = 8
c = 6 + 2 + 2 = 10
d = 7,5 + 2 + 2 + 2 = 12
n = primul numar ;
n+n+2+n+4+n+6 = 36 ; 4n = 36-12 = 24 ; n = 24:4 = 6;
numerele sunt : 6 ; 8 ; 10 ; 12 ; verificare : 6+8+10+12 = 36 ;