Which of the following letters will replace the question mark (?) and complete the following letter series?
D, B, X, R, J, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Z.
D - 2 = B, B - 4 = X, X - 6 = R, R - 8 = J, J - 10 = Z