calculeaza apoi incercuieste resturile obtinute

16:2=8 r 0
17:2=8 r 1
18:2=9 r 0
19:2=9 r 1
20:2=10 r 0
21:2=10 r 1
21:3=7 r 0
22:3=7 r 1
23:3=7 r 2
24:3=8 r 0
25:3=8 r 1
26:3=8 r 2
27:3=9
24:4=6 r 0
25:4=6 r 1
26:4=6 r 2
27:4=6 r 3
28:4=7 r 0
29:4=7 r 1
30:4=7 r 2
31:4=7 r 3
32:4=8 r 0