Series Completion

n each of the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

ac _ cab _ baca _ aba _ acac

Answer: (a)

The series is acac/abab/acac/abab/acac. Thus, the pattern acac/abab is repeated

a _ bbc _ aab _ cca _ bbcc

Answer: (b)

The series is aabbcc/aabbcc/aabbcc. Thus, the pattern 'aabbcc' is repeated.

_ bbca _ bcca _ ac _ a _ cb

Answer: (b)

The series is abbc/ac/bcca/ba/caab/cb.

c _ bbb _ _ abbbb _ abbb _

Answer: (b)

The series is cabbbb/cabbbb/cabbbb. Thus, the pattern 'cabbbb' is repeated.

_ _aba _ _ ba _ ab

Answer: (b)

The series is ab/ab/ab/ab/ab/ab. Thus, the pattern 'ab' is repeated.

_ tu _ rt _ s _ _ usrtu _

Answer: (d)

The series rtus/rtus/rtus/rtus. Thus, the pattern 'rtus' is repeated.

abca _ bcaab _ ca _ bbc _ a

Answer: (c)

The series is abc/aabc/aabbc/aabbcc/a.

_ a _ b _ abaa _ bab _ abb

Answer: (d)

The series is baa/bba/baa/bba/baa/bb. Thus, the pattern baa/bba is repeated.

_ stt _ tt _ tts _

Answer: (d)

The series is tst/tst/tst/tst. Thus, the pattern 'tst' is repeated.