Which letter will replace the question mark (?) in the following series?
M9, R64, W25, B216, ?
Answer & explanation
Correct answer: option 2
According to the above alphabet position:
M9 ⇒ (13), 32
R64 ⇒ (18), 43
W25 ⇒ (23), 52
B216 ⇒ (2), 63
? ⇒ (7), 72 = G49
(add 5 in 1st alphabet position and there is square and cube of consecutive numbers respectively in 2nd alphabet position)