Which letter will replace the question mark (?) in the following series?
B, C, F, K, ?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → R
Write each letter as its place in the alphabet and look at the gaps between neighbours.
B (2) to C (3) is 1 place, C (3) to F (6) is 3 places, and F (6) to K (11) is 5 places
The gaps are the odd numbers 1, 3, 5, so the next gap is 7
\(11+7=18\), that is R
So the missing letter is R.