Which letter will replace the question mark (?) in the following series?
AB, BD, CF, DH, ?
Answer & explanation
Correct answer: option 1
According to the above alphabet position:
AB ⇒ (1) × 2 = (2)
BD ⇒ (2) × 2 = (4)
CF ⇒ (3) × 2 = (6)
DH ⇒ (4) × 2 = (8)
? ⇒ (5) × 2 = (10) = EJ
(add 1 in 1st alphabet position and do twice of 1st in 2nd alphabet position)