Fill in the blank with correct option:

2, 4, 6, 8, 10, 12, ____, 16, 18 ,20.

If we observe the pattern, this is an increasing pattern.

2, 4, 6, 8, 10, 12, ____, 16, 18 ,20. 

Also in the pattern, the empty space would be a number greater than 12 and less than 16.

Since each number is increasing by 2 in the sequence, the next number will be 12+2 =14.