100+ Alphabet Series Questions with Answers
Practice these 100+ Alphabet Series MCQs to improve your letter-sequence skills for SSC, Railway, Banking, Defence, and other competitive examinations. Select an option to reveal the answer and a concept-based explanation.
1. What comes next in the series: A, C, E, G, ?
The letters increase by two positions each time: A, C, E, G, I.
2. What comes next: B, D, F, H, ?
Each letter advances by two positions in the alphabet, so H is followed by J.
3. Find the missing letter: C, F, I, L, ?
The pattern adds three alphabet positions each time: C, F, I, L, O.
4. Complete the series: D, H, L, P, ?
The letters move forward by four positions: D, H, L, P, T.
5. What is the next letter: Z, X, V, T, ?
The series moves backward by two positions: Z, X, V, T, R.
6. Find the next letter: Y, V, S, P, ?
Each term moves three positions backward in the alphabet, giving M after P.
7. Complete: A, D, G, J, ?
The pattern advances by three letters: A, D, G, J, M.
8. What comes next: E, J, O, T, ?
Each letter is five positions after the previous one: E, J, O, T, Y.
9. Find the missing letter: F, K, P, U, ?
The sequence advances by five positions, so U is followed by Z.
10. Complete the series: H, M, R, W, ?
Adding five positions cyclically gives H, M, R, W, B.
11. What comes next: A, B, D, G, K, ?
The gaps are +1, +2, +3, +4, so the next gap is +5: K + 5 = P.
12. Find the next letter: B, C, E, H, L, ?
The increments are +1, +2, +3, +4, then +5, giving Q.
13. Complete: C, E, H, L, Q, ?
The gaps increase by one: +2, +3, +4, +5, then +6; Q + 6 = W.
14. What comes next: Z, Y, W, T, P, ?
The backward gaps are −1, −2, −3, −4, then −5: P − 5 = K.
15. Find the missing letter: A, C, F, J, O, ?
The increments are +2, +3, +4, +5, and +6, so O + 6 = U.
16. Complete: B, E, I, N, T, ?
The gaps are +3, +4, +5, +6, then +7; T + 7 wraps around to A.
17. What comes next: A, Z, B, Y, C, ?
The series alternates from the beginning and end: A, B, C and Z, Y, X.
18. Find the next letter: B, Y, D, W, F, ?
Odd-position letters move forward B, D, F; even-position letters move backward Y, W, U.
19. Complete: C, X, E, V, G, ?
Odd terms are C, E, G; even terms are X, V, T, decreasing by two.
20. What comes next: D, W, G, T, J, ?
The two alternating series are D, G, J and W, T, Q.
21. Find the missing letter: AB, CD, EF, GH, ?
Each term contains two consecutive letters, and the pairs continue alphabetically: AB, CD, EF, GH, IJ.
22. Complete: AZ, BY, CX, DW, ?
The first letters move forward and the second letters move backward: AZ, BY, CX, DW, EV.
23. What comes next: AY, BW, CU, DS, ?
The first letter increases by one and the second decreases by two: AY, BW, CU, DS, EQ.
24. Find the next pair: BA, DC, FE, HG, ?
Both letters in each pair advance by two: BA, DC, FE, HG, JI.
25. Complete: ABC, DEF, GHI, JKL, ?
The groups contain three consecutive letters, continuing with MNO after JKL.
26. What comes next: ACE, BDF, CEG, ?
Each position advances by one: ACE, BDF, CEG, DFH.
27. Find the missing group: AZA, BYB, CXC, ?
The first and last letters move forward while the middle letter moves backward: AZA, BYB, CXC, DWD.
28. Complete: A, BB, CCC, DDDD, ?
The letter advances by one and its repetition count increases by one.
29. What comes next: Z, YY, XXX, WWWW, ?
The letters move backward one step while the number of repetitions increases: V repeated five times.
30. Find the next letter: A, B, C, E, H, M, ?
The gaps are +1, +1, +2, +3, +5; continuing with +6 gives S.
31. Complete: B, D, G, K, P, ?
The increments are +2, +3, +4, +5, then +6: P + 6 = V.
32. What comes next: C, G, L, R, ?
The gaps are +4, +5, +6, then +7, so R + 7 = Y.
33. Find the missing letter: D, I, O, V, ?
The increments are +5, +6, +7, then +8. V + 8 wraps around to D.
34. Complete: A, E, J, P, W, ?
The gaps increase from +4 to +5, +6, +7, then +8; W + 8 wraps to E.
35. What comes next: Z, U, O, H, ?
The backward gaps are −5, −6, −7, then −8; H − 8 wraps around to Z.
36. Find the next letter: A, C, B, D, C, E, ?
The pattern consists of two interleaved sequences: A, B, C, D and C, D, E.
37. Complete: B, E, C, F, D, G, ?
Odd terms are B, C, D, E, while even terms are E, F, G.
38. What comes next: A, D, B, E, C, F, ?
The alternating sequences are A, B, C, D and D, E, F.
39. Find the missing letter: C, F, D, G, E, H, ?
Odd-position terms are C, D, E, F; even-position terms are F, G, H.
40. Complete: A, F, B, G, C, H, ?
The odd-position sequence is A, B, C, D, and the even-position sequence is F, G, H.
41. What comes next: B, H, C, I, D, J, ?
The odd terms are B, C, D, E; the even terms are H, I, J.
42. Find the next letter: D, J, E, K, F, L, ?
Odd terms progress D, E, F, G, while even terms progress J, K, L.
43. Complete: A, H, C, J, E, L, ?
Odd-position letters are A, C, E, G; even-position letters are H, J, L.
44. What comes next: M, N, P, Q, S, T, ?
The pattern uses pairs of consecutive letters separated by one letter: MN, PQ, ST, UV.
45. Find the missing letter: A, C, D, F, G, I, ?
The pattern repeats +2, +1: A, C, D, F, G, I, J.
46. Complete: B, E, F, I, J, M, ?
The pattern repeats +3, +1: B, E, F, I, J, M, N.
47. What comes next: C, G, H, L, M, Q, ?
The pattern alternates +4 and +1: C, G, H, L, M, Q, R.
48. Find the next letter: D, I, J, O, P, U, ?
The sequence alternates +5 and +1, so U is followed by V.
49. Complete: A, B, D, E, G, H, ?
The pattern repeats +1, +2: A, B, D, E, G, H, J.
50. What comes next: Z, X, W, U, T, R, ?
The pattern alternates −2 and −1: Z, X, W, U, T, R, Q.
51. Find the missing letter: Y, V, U, R, Q, N, ?
The sequence alternates −3 and −1: Y, V, U, R, Q, N, M.
52. Complete: X, T, S, O, N, J, ?
The pattern alternates −4 and −1: X, T, S, O, N, J, I.
53. What comes next: A, D, E, H, I, L, ?
The pattern alternates +3 and +1: A, D, E, H, I, L, M.
54. Find the next letter: B, F, G, K, L, P, ?
The sequence alternates +4 and +1: B, F, G, K, L, P, Q.
55. Complete: C, H, I, N, O, T, ?
The pattern alternates +5 and +1, giving U after T.
56. What comes next: A, B, E, F, I, J, ?
The sequence consists of pairs separated by two letters: AB, EF, IJ, MN.
57. Find the missing letter: D, E, H, I, L, M, ?
The pairs are DE, HI, LM, OP; therefore, P follows M.
58. Complete: B, C, F, G, J, K, ?
The pairs are BC, FG, JK, NO, so N follows K.
59. What comes next: Z, Y, V, U, R, Q, ?
The pairs descend by three-letter blocks: ZY, VU, RQ, PO; however, following the alternating pattern gives N.
60. Find the next letter: A, C, F, H, K, M, ?
The pattern alternates +2 and +3: A, C, F, H, K, M, P.
61. Complete: B, E, G, J, L, O, ?
The sequence alternates +3 and +2: B, E, G, J, L, O, Q.
62. What comes next: C, F, H, K, M, P, ?
The pattern alternates +3 and +2, so P + 2 = R.
63. Find the missing letter: D, G, I, L, N, Q, ?
The increments alternate +3 and +2: D, G, I, L, N, Q, S.
64. Complete: A, E, G, K, M, Q, ?
The gaps alternate +4 and +2: A, E, G, K, M, Q, S.
65. What comes next: B, F, H, L, N, R, ?
The sequence alternates +4 and +2, giving T after R.
66. Find the next letter: C, G, I, M, O, S, ?
The gaps alternate +4 and +2: C, G, I, M, O, S, U.
67. Complete: D, H, J, N, P, T, ?
The pattern alternates +4 and +2, so T is followed by V.
68. What comes next: A, D, F, I, K, N, ?
The increments alternate +3 and +2: A, D, F, I, K, N, P.
69. Find the missing letter: B, E, G, J, L, O, ?
The increments alternate +3 and +2, giving Q after O.
70. Complete: C, G, I, M, O, S, ?
The pattern alternates +4 and +2: C, G, I, M, O, S, U.
71. What comes next: E, I, K, O, Q, U, ?
The increments alternate +4 and +2, so U is followed by W.
72. Find the next letter: F, J, L, P, R, V, ?
The gaps alternate +4 and +2: F, J, L, P, R, V, X.
73. Complete: G, K, M, Q, S, W, ?
The sequence alternates +4 and +2, giving Y after W.
74. What comes next: H, L, N, R, T, X, ?
The increments alternate +4 and +2: H, L, N, R, T, X, Z.
75. Find the missing letter: I, M, O, S, U, Y, ?
The pattern alternates +4 and +2; Y + 2 wraps around to A.
76. Complete: J, N, P, T, V, Z, ?
The increments alternate +4 and +2; Z + 2 wraps around to B.
77. What comes next: K, O, Q, U, W, ?
The pattern alternates +4 and +2: K, O, Q, U, W, A.
78. Find the next letter: L, P, R, V, X, ?
The increments alternate +4 and +2; X + 4 wraps around to B.
79. Complete: M, Q, S, W, Y, ?
The gaps alternate +4 and +2: M, Q, S, W, Y, C.
80. What comes next: N, R, T, X, Z, ?
The pattern alternates +4 and +2; Z + 4 wraps around to D.
81. Find the missing letter: O, S, U, Y, A, ?
The increments alternate +4 and +2 cyclically: O, S, U, Y, A, C.
82. Complete: P, T, V, Z, B, ?
The gaps alternate +4 and +2, so B + 2 = D.
83. What comes next: Q, U, W, A, C, ?
The increments alternate +4 and +2: Q, U, W, A, C, G.
84. Find the next letter: R, V, X, B, D, ?
The pattern alternates +4 and +2, giving H after D.
85. Complete: S, W, Y, C, E, ?
The increments alternate +4 and +2: S, W, Y, C, E, I.
86. What comes next: T, X, Z, D, F, ?
The pattern alternates +4 and +2, so F + 4 = J.
87. Find the missing letter: U, Y, A, E, G, K, ?
The increments alternate +4 and +2: U, Y, A, E, G, K, M.
88. Complete: V, Z, B, F, H, L, ?
The gaps alternate +4 and +2, giving N after L.
89. What comes next: W, A, C, G, I, M, ?
The pattern alternates +4 and +2: W, A, C, G, I, M, O.
90. Find the next letter: X, B, D, H, J, N, ?
The increments alternate +4 and +2: X, B, D, H, J, N, P.
91. Complete: Y, C, E, I, K, O, ?
The sequence alternates +4 and +2, so O is followed by Q.
92. What comes next: Z, D, F, J, L, P, ?
The increments alternate +4 and +2: Z, D, F, J, L, P, R.
93. What comes next: A, C, E, H, K, ?
The increments are +2, +2, +3, +3, so the next increment is +3: K + 3 = N.
94. Find the missing letter: B, D, G, I, L, N, ?
The pattern alternates +2 and +3: B, D, G, I, L, N, Q.
95. Complete the series: C, E, H, J, M, O, ?
The increments alternate +2 and +3, so O + 3 = R.
96. What comes next: D, F, I, K, N, P, ?
The sequence follows +2, +3 repeatedly: D, F, I, K, N, P, S.
97. Find the next letter: E, G, J, L, O, Q, ?
The increments alternate +2 and +3; therefore, Q + 3 = T.
98. Complete: F, I, K, N, P, S, ?
The pattern alternates +3 and +2: F, I, K, N, P, S, U.
99. What comes next: G, J, L, O, Q, T, ?
The increments alternate +3 and +2, so T + 2 = V.
100. Find the missing letter: H, K, M, P, R, U, ?
The pattern alternates +3 and +2: H, K, M, P, R, U, W.
Regular practice of Alphabet Series questions helps you identify forward, backward, alternating, paired, and cyclic letter patterns quickly. Review the explanations and practise similar sequences to improve accuracy and speed in reasoning examinations.
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