Which letter will replace the question mark (?) in the following series?
S4, Q9, O16, M25, ?
Answer & explanation
Correct answer: option 2
According to the above alphabet position:
S4 ⇒ (19), 22
Q9 ⇒ (17), 32
O16 ⇒ (15), 42
M25 ⇒ (13), 52
? ⇒ (11), 62 = K36
(subtract 2 in 1st alphabet position and there is square of consecutive numbers in 2nd alphabet position)