Which of the following letter-clusters will replace the question mark (?) and complete the following letter-cluster series?
IR, BY, UF, NM, GT, ?
Answer & explanation
Correct answer: option 1
Explanation:
IR, BY, UF, NM, GT, ?
The logic followed here is :
I → (-7) → B → (-7) → U → (-7) → N → (-7) → G → (-7) → Z
R → (+7) → Y → (+7) → F → (+7) → M → (+7) → T → (+7) → A
So, the letter-cluster that replaces the (?) to complete the series is "ZA"