Which of the four options will replace the question mark (?) in the following series?
XF 11 , YI 15, ZL 19 , AO 23, ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. BR 27.
First letter: X + 1 = Y, Y + 1 = Z, Z + 1 = A, A + 1 = B
Second letter: F + 3 = I, I + 3 = L, L + 3 = O, O + 3 = R
Number: 11 + 4 = 15, 15 + 4 = 19, 19 + 4 = 23, 23 + 4 = 27