In the series below, the terms in the odd places (1st, 3rd, 5th, ...) follow one repeating pattern and the terms in the even places (2nd, 4th, 6th, ...) follow another repeating pattern.
K 2 L 5 M 2 K _ L 2 _ 5 K 2 _ 5
Which option gives the missing terms, from left to right?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 5, M, L
Split the series into two series: one made of the terms in the odd places and one made of the terms in the even places. Each one repeats its own group.
Odd places (1st, 3rd, 5th, ..., 15th): K L M K L _ K _; the repeating group is K L M
So the 11th term (6th of the odd series) is M, and the 15th term (8th of the odd series) is L
Even places (2nd, 4th, 6th, ..., 16th): 2 5 2 _ 2 5 2 5; the repeating group is 2 5
So the 8th term (4th of the even series) is 5
The missing terms, from left to right, are the 8th, 11th and 15th terms: 5, M, L.