Which of the following sets of letters would complete the letter series, when they are placed sequentially?
bb-abb-bb-ccb-c
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → ccbb
The series is built from groups of four letters: each group is “bbc” followed by a, b and c in turn. Splitting the series into groups of four shows which letter each blank needs.
bb_a: the group bbca needs c
bb_b: the group bbcb needs c
b_cc: the group bbcc needs b
b_c: the last group starts bbc again and needs b
The completed series is bbca bbcb bbcc bbc.