Which odd number comes next?

1,         3,         5,         ?

Which even number comes before?

?,         12,         14,         16

Which even number comes before?

?,         6,         8,         10

Which even number comes before?

?,         14,         16,         18

Which even number comes next?

2,          4,          6,         ?

Which even number comes before?

?,         16,         18,         20

Which odd number comes before?

?,         5,             7,             9

Which even number comes next?

12,          14,          16,         ?

Which even number comes next?

10,          12,          14,         ?

Which even number comes next?

14,          16,          18,         ?

Which even number comes next?

8,          10,          12,         ?

Which even number comes next?

16,          18,          20,         ?

Which odd number comes next?

11,         13,         15,     ?

Which odd number comes next?

13,         15,         17,     ?

Which odd number comes next?

9,         11,         13,     ?

Which odd number comes next?

7,         9,         11,     ?

Which odd number comes next?

15,         17,         19,     ?

Which odd number comes before?

?,         15,             17,             19

Which odd number comes before?

?,         11,             13,             15

Which odd number comes before?

?,         17,             19,             21

Which even number comes next?

4,    6,    8,

Which odd number comes before?

?,         9,             11,             13

Which odd number comes before?

?,           3,           5,          7

Which odd number comes before?

?,         19,             21,             23

Which odd number comes next?

3,          5,         7,        ?

Which even number comes before?

?,         16,         18,         20

Which even number comes before?

?,         4,         6,         8

Which even number comes before?

?,         10,         12,         14