Select the option that can replace the question mark (?) in the following series.
VO39, TM35, RK31, PI27, ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. NG23.
V - 2 = T, T - 2 = R, R - 2 P, P - 2 = N
O - 2 = M, M - 2 = K, K - 2 = I, I - 2 = G
39 - 4 = 35, 35 - 4 = 31, 31 - 4 = 27, 27 - 4 = 23