n:12= c (r)
r=2c
D:Î=C (R)
D=ηC+R, R<Î, Î diferit de 0
Deci r<12
Dar r=2c => 2c<12 => c<6
Deci c€{0, 1, 2, 3, 4, 5}
Si r€{0, 2, 4, 6, 8, 10}
Cazul 1:
c=0 si r=0
n=12·0+0=0
Cazul 2:
c=1 si r=2
n=12·1+2=14
Cazul 3:
c=2 si r=4
n=12·2+4=24+4=28
Cazul 4:
c=3 si r=6
n=12·3+6=36+6=42
Cazul 5:
c=4 si r=8
n=12·4+8=48+8=56
Cazul 6:
c=5 si r=10
n=12·5+10=60+10=70
R: n€{0, 14, 28, 42, 56, 70}