Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
YAK, CEO, GIS, KMW, ?
- AOAQ
- BOQA
- CPRB
- DOPA
Solution & Step-by-step Explanation
Let's check the positional jumps for each element across the series:
First letter:
Y (25) +4→ C (3) +4→ G (7) +4→ K (11) +4→ O (15)
Second letter:
A (1) +4→ E (5) +4→ I (9) +4→ M (13) +4→ Q (17)
Third letter:
K (11) +4→ O (15) +4→ S (19) +4→ W (23) +4→ A (27≡1)
Thus, the missing cluster is OQA.
First letter:
Y (25) +4→ C (3) +4→ G (7) +4→ K (11) +4→ O (15)
Second letter:
A (1) +4→ E (5) +4→ I (9) +4→ M (13) +4→ Q (17)
Third letter:
K (11) +4→ O (15) +4→ S (19) +4→ W (23) +4→ A (27≡1)
Thus, the missing cluster is OQA.