Question : Directions: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a _ aabb _ _ ab _ b _
Option 1: baaaa
Option 2: babab
Option 3: baaba
Option 4: bbaaa
Correct Answer: baaba
Solution :
Given:
a _ aabb _ _ ab _ b _
To fill the series we have to divide the series – a _ / aabb /_ _ab _ b /_
Let's check each option –
First option:
baaaa; a
b
/ aabb /
a
a
ab
a
b /
a
(No repeated pattern has been found.)
Second option:
babab; a
b
/ aabb /
ab
ab
a
b /
b
(No repeated pattern has been found.)
Third option:
baaba; a
b
/ aabb /
a
a
ab
b
b /
a
(Here, the number of a and b are increased by one.)
Fourth option:
bbaaa; ab / aabb / baab
a
b /
a
(No repeated pattern has been found.)
So, the series is abaabbaaabbba. Hence, the third option is correct.
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