Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
AB, EF, CD, GH, ____, IJ, GHThe pattern follows:
(A + 4)(B + 4) = EF
(E – 2)(F – 2) = CD
(C + 4)(D + 4) = GH
(G – 2)(H – 4) = EF
(E + 4)(F + 4) = IJ
(I – 2)(J – 4) = GH
Here each term follow +4.
Hence, “EF” is the missing term.


