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251. Choose the correct order of the given alternative : _ nmmn _ mmnn _ mnnm _
Solution:
The series is nnmm/nnmm/nnmm/nnmm. Thus, the pattern 'nnmm' is repeated.
252. Choose the correct order of the given alternative : a _ bd _ da _ dbc _ b _ dc
Solution:
The series is acbd/cdab/dbca/badc. Clearly, each group consists of letters of the previous group in the order - second, forth, fifth, third.
253. Choose the correct order of the given alternative : a _ bc _ a _ bcda _ ccd _ bcd _
Solution:
The series is aabcd/abbcd/abccd/abcdd.
254. Choose the correct order of the given alternative : a _ bb _ baa _ bbb _ aa _
Solution:
The series is aabbbb/aaabbb/aaaa. At each step, the number of a's increases by one; while the number of b's decreases by one.
255. Choose the correct order of the given alternative : _ aba _ cabc _ deba _ bab _ a
Solution:
The series is aabab/cabcd/dcbac/babaa. Thus, the letters equidistant from the beginning and the end of series are the same.
256. Choose the correct order of the given alternative : _ c _ bd _ cbcda _ a _ db _ a
Solution:
The series is acdb/dacb/cdab/acdb/da. Clearly, each group of four letters contains the letters of the previous group in the order - third, first, second and fourth.
257. Choose the correct order of the given alternative : a _ cdaab _ cc _ daa _ daa _ bbb _ ccddd
Solution:
The series is abcd/aabbccdd/aaabbbcccddd. Thus, the each letter of first sequence is repeated two times in the second sequence and three times in the third sequence.
258. Choose the correct order of the given alternative : c _ baa _ aca _ cacab _ acac _ bca
Solution:
The series is cab/aa/cacab/cacab/aa/cacab/ca. Thus, the pattern 'cacab/cacab/aa' is repeated.
259. Choose the correct order of the given alternative : adb _ ac _ da _ cddcb _ dbc _ cbda
Solution:
The series is adbc/acbd/abcd/dcba/dbca/cbda. Thus, the letters equidistant from the beginning and the end of series are the same.
260. Choose the correct order of the given alternative : _ bcdbc _ dcabd _ bcdbc _ dc _ bd
Solution:
The series is abcd/bcad/cabd/abcd/bcad/cabd. Clearly, each group consists of letters of the previous group in the order - second, third, first and fourth.