Which group of letters will fill the blank in the given series?
BKK, DMM, FOO, ____, JSS
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → HQQ
In a series of letter groups, each place in the group follows its own rule. Here the second and third letters of each group are the same.
First letters B (2), D (4), F (6), ?, J (10): each is 2 places ahead, so the blank has \(6+2=8\), which is H
Second and third letters K (11), M (13), O (15), ?, S (19): each is 2 places ahead, so the blank has \(15+2=17\), which is Q
Check: H \(+2\) is J and Q \(+2\) is S, giving the last group JSS
So the missing group is HQQ.