Question : Directions: In each of the following questions, which one set of letters/numbers when sequentially placed at the gaps in the given letter series shall complete it?
bb_aab_caab_ca_
Option 1: abac
Option 2: bcab
Option 3: cbba
Option 4: acab
Correct Answer: cbba
Solution :
Given:
bb_aab_caab_ca_
To fill the series we have to divide the series – bb_aa / b_caa / b_ca_
Let's check each option –
First option:
abac; bb
a
aa / b
b
caa / b
a
ca
c
(No repeated pattern has been found.)
Second option:
bcab; bb
b
aa / b
c
caa / b
a
ca
b
(No repeated pattern has been found.)
Third option:
cbba; bb
c
aa / b
b
caa / b
b
ca
a
(bbcaa is repeated in the series.)
Fourth option:
acab; bb
a
aa / b
c
caa / b
a
ca
b
(No repeated pattern has been found.)
So, the series becomes bbcaabbcaabbcaa. Hence, the third option is correct.
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