Calculați:
21:2=
23:2=
25:2=
27:2=
28:2=

41:2=
43:2=
45:2=
47:2=
49:2=

61:2=
63:2=
65:2=
67:2=
69:2=

81:2=
83:2=
85:2=
87:2=
89:2=

31:3=
33:3=
35:3=
37:3=
38:3=​