Which number will replace the question mark (?) in the following series?
12,14,26,40,66,?

Let's find the relationship between consecutive terms in the series:
This is a cumulative addition series (Fibonacci-type logic), where each term starting from the third term is the sum of the preceding two terms:

12+14=26

14+26=40

26+40=66

Following the same logic, the next term will be:

40+66=106

Hence, the correct answer is 106.