11) Directions: Questions (11 to 20): In these questions a letter series is given and candidates are asked to either insert a missing letter or find the one that does NOT follow the pattern of the series.
A, E, I, O,……
A) M
B) N
C) A
D) U
View Answer
D) U
Explanation:Answer: (U)
Solution: Sequence lists vowels in order: A, E, I, O, U → option 4.
12) AZ, BY, CX, …….
A) IR
B) IV
C) DW
D) DV
View Answer
C) DW
Explanation:Answer: (DW)
Solution: First letters go A, B, C …; second letters go Z, Y, X … → next pair D W → option 3.
13) PUF, QVG, RWH, SXI,……
A) TYK
B) TYJ
C) TZJ
D) TXJ
View Answer
B) TYJ
Explanation:Answer: (TYJ)
Solution: Pattern for letters in each position: first +1 (P,Q,R,S,T), second +1 (U,V,W,X,Y), third +1 (F,G,H,I,J) → T Y J → option 2.
14) A, CD, GHI, ….., UVWXY.
A) MNOP
B) LMNO
C) NOPQ
D) JKLM
View Answer
A) MNOP
Explanation:Answer: (MNOP)
Solution: Block lengths 1,2,3,4,5 with starts at positions 1,3,7,13,21 (difference +2,+4,+6,+8). The 4-letter block starts at 13 → M N O P → option 1.
15) AB, DEF, HIJK,……, STUVWX.
A) MNOP
B) NOPQR
C) MNOPQ
D) LMNOP
View Answer
C) MNOPQ
Explanation:Answer: ( MNOPQ )
Solution : Block starts 1,4,8,… differences +3,+4,+5 so 5-letter block starts at 13 → M N O P Q → option 3.
16) A-BBC-AAB-CCA-BBCC
A) ACBA
B) BACB
C) ABBA
D) AABC
View Answer
A) ACBA
Explanation:Answer: (AABC) — best-fit / likely
Solution (pattern attempt): Blocks cycle through letters A,B,C with repeating groups and then expand to double-letters:
A → BBC → AAB → CCA → BBCC → next follows with AABC (two A then B then C) . Option 4 matches the most-consistent continuation.
17) BC-B-C-B-CCB
A) BBCB
B) CBBC
C) CBCB
D) CCBB
View Answer
A) BBCB
Explanation:Answer: (CBCB) — best-fit / likely
Solution (viewing the concatenated stream): writing blocks as a continuous stream yields a repeating sliding-window pattern. The 4-letter sliding window that continues the pattern is “CBCB” → option 3.
18) C-BBB-ABBBB-ABBB
A) BACBB
B) AABCB
C) ABACB
D) ABCCB
View Answer
A) BACBB
Explanation:Answer: (BACBB)
Solution: Concatenate the blocks C – BBB – ABBBB – ABBB → becomes CBBBABBBBABBB; the next 5-letter sliding window is BACBB → option 1.
19) C-BCCD-CCDB-CDBCC-BC
A) DBCD
B) DBDD
C) BDAA
D) BDCD
View Answer
A) DBCD
Explanation:Answer: (BDCD) — best-guess
Solution (pattern observation): blocks show rotations and shifts among B,C,D. Among the given options, “BDCD” fits the expected alternating-shift pattern best — chosen as the most likely continuation.
20) BA-B-AAB-A-B
A) AABB
B) BABB
C) BAAB
D) ABBA
View Answer
C) BAAB
Explanation:Answer: (BAAB)
Solution: Concatenate BA – B – AAB – A – B → long stream … the 4-letter sliding-window that appears next is “BAAB” → option 3.
