Select the option that can replace the question mark (?) in the following series.
OA33, RD36, UG39, XJ42, ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. AM45.
Given series: OA33, RD36, UG39, XJ42, ?
O + 3 = R; R + 3 = U; U + 3 = X; X + 3 = A;
A + 3 = D; D + 3 = G; G + 3 = J; J + 3 = M;
33 + 3 = 36; 36 + 3 = 39; 39 + 3 = 42; 42 + 3 = 45