Question : Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a_ _b abba_abb a_ba
Option 1: abab
Option 2: abba
Option 3: aabb
Option 4: aaab
Correct Answer: abab
Solution : Given:
a_ _b abba_abb a_ba
Let's check the given options –
First option:
abab
The series becomes a
ab
babba
a
abba
b
ba.
The pattern in the series becomes
a
a / b
b / ab / ba /
a
a / bb / a
b /
ba.
Second option:
abba
The series becomes aa
b
babba
b
abba
a
ba.
There is no pattern in the above series.
Third option:
aabb
The series becomes a
aa
babba
b
abba
b
ba.
There is no pattern in the above series.
Fourth option:
aaab
The series becomes a
aa
babba
a
abba
b
ba.
There is no pattern in the above series.
Hence, the first option is correct.
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