Which of the following terms will replace the question mark (?) in the given series?
DBOI, FEQL, ?, JKUR, LNWU

Options
a) HISP
b) HHSO
c) IHSP
d) HISO

Solution

As per question
DBOI, FEQL, ?, JKUR, LNWU
Logic :-
DBOI -> 4, 2, 15, 9
(4 + 2 , 2 + 3 , 15 + 2 , 9 + 3)
(6 , 5 , 17 , 12) = FEQL
(6 + 2, 5 + 3, 17 + 2, 12 + 3)
(8 , 8 , 19 , 15) = HHSO
JKUR -> 10, 11, 21, 18
(10 + 2, 11 + 3, 21 + 2, 18 + 3) =
(12 , 14 , 23 , 21) = LNWU

Ans: b) HHSO