Select the letter cluster that will replace the question mark (?) in the following series.
FPJ, GLL, HHN, ?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → IDP
In a letter-cluster series, each position of the cluster follows its own rule, so each position is checked separately using the place of the letter in the alphabet.
First letters F (6), G (7), H (8): 1 place ahead each time, so the next is \(8+1=9\), that is I
Second letters P (16), L (12), H (8): 4 places back each time, so the next is \(8-4=4\), that is D
Third letters J (10), L (12), N (14): 2 places ahead each time, so the next is \(14+2=16\), that is P
So the next cluster is IDP.