Which set of letters, when placed in the blanks of the given letter series in order, will complete it?
_ c d _ d _ d e _ e c _
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → ececd
Split the 12 places into four groups of three. Each group uses the letters c, d, e, and each group is the one before it with its first letter moved to the end.
Group 1: _ c d becomes e c d
Group 2: _ d _ becomes c d e (ecd with e moved to the end)
Group 3: d e _ becomes d e c (cde with c moved to the end)
Group 4: e c _ becomes e c d (dec with d moved to the end)
The series is ecd cde dec ecd, and the blanks in order are ececd.