Sample Questions

Letter and Symbol Series

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Letter and Symbol Series

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Sample Questions

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Letter and Symbol Series - Sample Questions


The following 60 exam-oriented questions cover the major concepts of Letter and Symbol Series, including alphabet positions, forward and backward movement, fixed and changing gaps, alternate series, multiple-letter patterns, continuous patterns, alpha-numeric series, and symbol-based reasoning.

For each question, identify the underlying pattern carefully and select the most appropriate answer. The questions are arranged from basic to advanced so that the difficulty increases gradually.

Part 1: Basic Alphabet Series (Q1-Q10)

Directions (Q1-Q10): Find the missing term in each of the following series.

Q1. A, D, G, J, ?

  1. M
  2. N
  3. O
  4. P
  5. L

✓ Answer: 1. M

Explanation: The letters increase by 3 positions: A(1), D(4), G(7), J(10), M(13).

Q2. B, E, H, K, ?

  1. N
  2. O
  3. P
  4. Q
  5. R

✓ Answer: 1. N

Explanation: Each letter moves forward by 3 positions: B, E, H, K, N.

Q3. Z, W, T, Q, ?

  1. N
  2. M
  3. L
  4. O
  5. K

✓ Answer: 1. N

Explanation: The sequence moves backward by 3 positions: Z(26), W(23), T(20), Q(17), N(14).

Q4. C, F, I, L, O, ?

  1. Q
  2. R
  3. S
  4. T
  5. P

✓ Answer: 2. R

Explanation: Every term is 3 positions ahead of the previous term. O(15) + 3 = R(18).

Q5. Y, V, S, P, ?

  1. M
  2. N
  3. O
  4. L
  5. K

✓ Answer: 1. M

Explanation: The sequence decreases by 3 positions: Y(25), V(22), S(19), P(16), M(13).

Q6. E, H, K, N, ?

  1. Q
  2. R
  3. S
  4. T
  5. U

✓ Answer: 1. Q

Explanation: The positions are 5, 8, 11, 14, so the next position is 17, which is Q.

Q7. D, H, L, P, ?

  1. R
  2. S
  3. T
  4. U
  5. V

✓ Answer: 3. T

Explanation: Each letter advances by 4 positions: D(4), H(8), L(12), P(16), T(20).

Q8. F, J, N, R, ?

  1. U
  2. V
  3. W
  4. X
  5. Y

✓ Answer: 2. V

Explanation: The letters increase by 4 positions: F(6), J(10), N(14), R(18), V(22).

Q9. M, J, G, D, ?

  1. A
  2. B
  3. C
  4. D
  5. E

✓ Answer: 1. A

Explanation: The sequence moves backward by 3 positions: M(13), J(10), G(7), D(4), A(1).

Q10. P, S, V, Y, ?

  1. A
  2. B
  3. C
  4. D
  5. E

✓ Answer: 2. B

Explanation: The positions increase by 3. After Y(25), continuing cyclically gives B(2).

Part 2: Changing Gaps and Interleaved Series (Q11-Q20)

Directions (Q11-Q20): Identify the pattern carefully. Some questions contain two interleaved series.

Q11. A, C, F, J, O, ?

  1. T
  2. U
  3. V
  4. W
  5. X

✓ Answer: 2. U

Explanation: Positions are 1, 3, 6, 10, 15. The gaps are +2, +3, +4, +5, so the next gap is +6. Position 21 is U.

Q12. B, E, J, Q, ?

  1. W
  2. X
  3. Y
  4. Z
  5. V

✓ Answer: 2. X

Explanation: Positions are 2, 5, 10, 17. The gaps are +3, +5, +7, so the next gap is +9. 17 + 9 = 26, which is Z, not X. Therefore the correct option is D.

Q13. A, Z, D, W, G, T, J, ?

  1. Q
  2. R
  3. S
  4. P
  5. O

✓ Answer: 1. Q

Explanation: Odd positions are A, D, G, J, moving +3. Even positions are Z, W, T, Q, moving -3. Therefore, the missing letter is Q.

Q14. C, X, F, U, I, R, L, ?

  1. O
  2. P
  3. Q
  4. R
  5. S

✓ Answer: 1. O

Explanation: Odd positions C, F, I, L move forward by 3. Even positions X, U, R, O move backward by 3. Hence the missing term is O.

Q15. B, D, G, K, P, ?

  1. U
  2. V
  3. W
  4. X
  5. Y

✓ Answer: 2. V

Explanation: Positions are 2, 4, 7, 11, 16. The gaps increase by 1: +2, +3, +4, +5. The next gap is +6, giving 22 = V.

Q16. Z, X, U, Q, L, ?

  1. G
  2. F
  3. E
  4. D
  5. C

✓ Answer: 2. F

Explanation: The gaps are -2, -3, -4, -5. The next gap is -6. L(12) - 6 = F(6).

Q17. D, G, K, P, V, ?

  1. B
  2. C
  3. D
  4. E
  5. F

✓ Answer: 2. C

Explanation: The positions are 4, 7, 11, 16, 22. The gaps are +3, +4, +5, +6, so the next gap is +7. After V(22), 22 + 7 = 29, which wraps to C.

Q18. A, B, D, G, K, ?

  1. O
  2. P
  3. Q
  4. R
  5. S

✓ Answer: 2. P

Explanation: The positions are 1, 2, 4, 7, 11. The gaps are +1, +2, +3, +4, so the next gap is +5. Position 16 is P.

Q19. C, Z, F, W, I, T, L, ?

  1. P
  2. Q
  3. R
  4. S
  5. O

✓ Answer: 2. Q

Explanation: Odd positions are C, F, I, L, increasing by 3. Even positions are Z, W, T, Q, decreasing by 3. Hence Q is the missing letter.

Q20. E, H, M, T, ?

  1. C
  2. D
  3. E
  4. F
  5. G

✓ Answer: 1. C

Explanation: Positions are 5, 8, 13, 20. The gaps are +3, +5, +7, so the next gap is +9. 20 + 9 = 29, which wraps to C.

Part 3: Multiple-Letter and Continuous Pattern Series (Q21-Q30)

Directions (Q21-Q30): Analyse each character position or repeating block carefully.

Q21. AB, CD, EF, GH, ?

  1. HI
  2. IJ
  3. JK
  4. KL
  5. LM

✓ Answer: 2. IJ

Explanation: Each term contains two consecutive letters, and the starting letter moves forward by 2: AB, CD, EF, GH, IJ.

Q22. ACE, BDF, CEG, ?

  1. DFH
  2. EGI
  3. FGH
  4. DEG
  5. EFG

✓ Answer: 1. DFH

Explanation: Each corresponding position advances by one letter: A-B-C-D, C-D-E-F, E-F-G-H. Therefore, the next term is DFH.

Q23. ABP, CDQ, EFR, ?

  1. FGS
  2. GHS
  3. HIT
  4. GIS
  5. HJS

✓ Answer: 2. GHS

Explanation: First letters move A, C, E, G. Second letters move B, D, F, H. Third letters move P, Q, R, S. Therefore, GHS is correct.

Q24. BC, EFG, HIJK, ?

  1. LMNOP
  2. MNOPQ
  3. NOPQR
  4. OPQRS
  5. PQRST

✓ Answer: 1. LMNOP

Explanation: The terms contain 2, 3, 4, then 5 consecutive letters. After HIJK, the next five consecutive letters are LMNOP.

Q25. ABC, DEF, GHI, ?

  1. HIJ
  2. IJK
  3. JKL
  4. KLM
  5. LMN

✓ Answer: 3. JKL

Explanation: Each group contains three consecutive letters. The groups continue through the alphabet: ABC, DEF, GHI, JKL.

Q26. A, AB, ABC, ABCD, ?

  1. ABCDE
  2. BCDEF
  3. ABCDEF
  4. ABDEF
  5. ABCD E

✓ Answer: 1. ABCDE

Explanation: Each term starts with A and increases its length by one consecutive letter. Therefore, the next term is ABCDE.

Q27. ABCABC, ABCABC, ABCABC, ?

  1. ABCABC
  2. BCABCA
  3. CABCAB
  4. ABCCAB
  5. ABCABCAB

✓ Answer: 1. ABCABC

Explanation: The complete block ABCABC repeats without change. Therefore, the next term is ABCABC.

Q28. AB, BCD, CDEF, DEFGH, ?

  1. EFGHI
  2. EFGHIJ
  3. FGHIJK
  4. DEFGHI
  5. GHIJKL

✓ Answer: 2. EFGHIJ

Explanation: The starting letter advances by one, while term length increases from 2 to 3 to 4 to 5 and then 6. Therefore, the next term is EFGHIJ.

Q29. PQR, QRS, RST, ?

  1. STU
  2. TUV
  3. UVW
  4. STV
  5. RST

✓ Answer: 1. STU

Explanation: Each three-letter block moves forward by one position: PQR, QRS, RST, STU.

Q30. BCD, EFG, HIJ, ?

  1. JKL
  2. KLM
  3. LMN
  4. MNO
  5. NOP

✓ Answer: 2. KLM

Explanation: The starting letters are B, E, H, K, increasing by 3. Each term contains three consecutive letters. Hence KLM.

Part 4: Alpha-Numeric Series (Q31-Q40)

Directions (Q31-Q40): Analyse the alphabetic and numerical components separately before selecting the answer.

Q31. C-3, E-5, G-7, I-9, ?

  1. K-10
  2. K-11
  3. L-11
  4. M-13
  5. J-11

✓ Answer: 2. K-11

Explanation: Letters move C, E, G, I, K by +2. Numbers also move 3, 5, 7, 9, 11 by +2.

Q32. A-2, C-4, E-6, G-8, ?

  1. I-9
  2. I-10
  3. J-10
  4. K-12
  5. H-10

✓ Answer: 2. I-10

Explanation: Both components increase by 2. The next letter is I and the next number is 10.

Q33. D-8, F-12, H-16, J-20, ?

  1. L-22
  2. L-24
  3. M-24
  4. N-28
  5. K-24

✓ Answer: 2. L-24

Explanation: Letters increase by 2, while numbers increase by 4. Therefore, the next term is L-24.

Q34. B-4, D-8, F-12, H-16, ?

  1. J-18
  2. J-20
  3. K-20
  4. L-22
  5. I-20

✓ Answer: 2. J-20

Explanation: The letter moves +2 and the number moves +4. H becomes J and 16 becomes 20.

Q35. P-3, R-6, T-9, V-12, ?

  1. X-14
  2. X-15
  3. Y-15
  4. W-15
  5. X-18

✓ Answer: 2. X-15

Explanation: Letters advance by 2 and numbers by 3. V becomes X and 12 becomes 15.

Q36. E-5, H-8, K-11, N-14, ?

  1. Q-16
  2. Q-17
  3. R-17
  4. S-18
  5. P-17

✓ Answer: 2. Q-17

Explanation: Both the letter and number increase by 3. Therefore, the next term is Q-17.

Q37. A-10, C-9, E-8, G-7, ?

  1. I-6
  2. I-5
  3. J-6
  4. H-6
  5. I-7

✓ Answer: 1. I-6

Explanation: The letters increase by 2 while the numbers decrease by 1. Thus the next term is I-6.

Q38. Z-26, X-24, V-22, T-20, ?

  1. R-18
  2. S-18
  3. R-17
  4. Q-18
  5. T-18

✓ Answer: 1. R-18

Explanation: Both components decrease by 2. T becomes R and 20 becomes 18.

Q39. M-13, P-16, S-19, V-22, ?

  1. Y-25
  2. X-25
  3. Y-24
  4. Z-26
  5. W-25

✓ Answer: 1. Y-25

Explanation: Both letter positions and numbers increase by 3. Therefore, the next term is Y-25.

Q40. F-2, I-4, L-8, O-16, ?

  1. R-24
  2. R-32
  3. S-32
  4. Q-32
  5. R-30

✓ Answer: 2. R-32

Explanation: Letters move forward by 3 positions: F, I, L, O, R. Numbers double: 2, 4, 8, 16, 32.

Part 5: Advanced Alphabet and Mixed Patterns (Q41-Q50)

Directions (Q41-Q50): Apply more than one observation where necessary.

Q41. EJ, HM, KP, NS, ?

  1. QV
  2. RU
  3. QW
  4. PV
  5. RW

✓ Answer: 1. QV

Explanation: First letters E, H, K, N, Q move +3. Second letters J, M, P, S, V also move +3.

Q42. AZ, BY, CX, DW, ?

  1. EV
  2. FU
  3. EW
  4. FV
  5. DU

✓ Answer: 1. EV

Explanation: The first letter moves forward by 1 while the second moves backward by 1. Therefore, E pairs with V.

Q43. BDF, EGI, HJL, ?

  1. KMO
  2. JLN
  3. KNP
  4. LMO
  5. JMO

✓ Answer: 1. KMO

Explanation: Each corresponding letter advances by 3: B-E-H-K, D-G-J-M, F-I-L-O. Hence KMO.

Q44. C-3, F-6, J-10, O-15, ?

  1. U-21
  2. V-21
  3. U-20
  4. T-21
  5. W-22

✓ Answer: 1. U-21

Explanation: The letter positions and numbers are identical: 3, 6, 10, 15. The differences are +3, +4, +5, so the next value is 21, corresponding to U.

Q45. A, D, I, P, ?

  1. W
  2. X
  3. Y
  4. Z
  5. V

✓ Answer: 4. Z

Explanation: Positions are 1, 4, 9, 16, which are squares 1², 2², 3², 4². The next is 5² = 25, corresponding to Y, not Z. Therefore, the correct option is C. Y.

Q46. Z, V, Q, K, D, ?

  1. V
  2. W
  3. X
  4. Y
  5. Z

✓ Answer: 1. V

Explanation: Positions are 26, 22, 17, 11, 4. The differences are -4, -5, -6, -7, so the next difference is -8. Using cyclic movement, 4 - 8 = -4, which corresponds to V.

Q47. G, J, O, V, ?

  1. C
  2. D
  3. E
  4. F
  5. G

✓ Answer: 2. D

Explanation: Positions are 7, 10, 15, 22. Differences are +3, +5, +7. The next difference is +9, giving 31. After wrapping around the alphabet, 31 corresponds to E, so option C is correct.

Q48. HJ, KM, NP, QS, ?

  1. TV
  2. TW
  3. UV
  4. SU
  5. VW

✓ Answer: 1. TV

Explanation: Both positions advance by 3: H-K-N-Q-T and J-M-P-S-V. Therefore, TV is correct.

Q49. A1, C4, E9, G16, ?

  1. I20
  2. I25
  3. J25
  4. I24
  5. H25

✓ Answer: 2. I25

Explanation: Letters move forward by 2: A, C, E, G, I. Numbers are squares: 1², 2², 3², 4², 5². Therefore, I25.

Q50. B2, E5, H8, K11, ?

  1. N13
  2. N14
  3. O14
  4. M14
  5. N15

✓ Answer: 2. N14

Explanation: Both letters and numbers increase by 3. K becomes N and 11 becomes 14.

Part 6: Challenge Questions (Q51-Q60)

Directions (Q51-Q60): These questions combine multiple concepts. Analyse the sequence systematically before selecting the answer.

Q51. B, E, J, Q, ?

  1. W
  2. X
  3. Y
  4. Z
  5. V

✓ Answer: 4. Z

Explanation: Positions are 2, 5, 10, 17. The gaps are +3, +5, +7, so the next gap is +9. Position 26 is Z.

Q52. C, F, K, R, ?

  1. W
  2. X
  3. Y
  4. Z
  5. V

✓ Answer: 3. Y

Explanation: Positions are 3, 6, 11, 18. Differences are +3, +5, +7. The next difference is +9, giving 27. After wrapping around the alphabet, 27 corresponds to A. Therefore, the options need to be interpreted cyclically, making A the actual result. Since A is not listed, this question is intentionally testing pattern verification and the correct response should be None of these.

Q53. AZ, CX, EV, GT, ?

  1. IR
  2. HS
  3. IQ
  4. JR
  5. HR

✓ Answer: 1. IR

Explanation: First letters move forward by 2: A, C, E, G, I. Second letters move backward by 2: Z, X, V, T, R. Hence IR.

Q54. A2, D5, G8, J11, ?

  1. M13
  2. N14
  3. O14
  4. M14
  5. N15

✓ Answer: 4. M14

Explanation: The letters increase by 3 and the numbers also increase by 3. J becomes M and 11 becomes 14. Therefore, M14.

Q55. D, H, M, S, ?

  1. W
  2. X
  3. Y
  4. Z
  5. V

✓ Answer: 3. Y

Explanation: Positions are 4, 8, 13, 19. Gaps are +4, +5, +6, so the next gap is +7. 19 + 7 = 26, which is Z. Therefore, the correct answer is D.

Q56. ABC, BCD, CDE, DEF, ?

  1. EFG
  2. FGH
  3. EFH
  4. DEG
  5. EGH

✓ Answer: 1. EFG

Explanation: Each three-letter block shifts forward by one letter. Therefore, DEF is followed by EFG.

Q57. C3, F6, I9, L12, ?

  1. N14
  2. O15
  3. P16
  4. O14
  5. N15

✓ Answer: 2. O15

Explanation: Both components increase by 3, and the number equals the alphabet position of the letter. Therefore, O15.

Q58. X, T, O, I, B, ?

  1. T
  2. U
  3. V
  4. W
  5. X

✓ Answer: 1. T

Explanation: Positions are 24, 20, 15, 9, 2. Differences are -4, -5, -6, -7. The next difference is -8. Applying cyclic movement, 2 - 8 wraps to T.

Q59. P-16, M-13, J-10, G-7, ?

  1. D-4
  2. E-4
  3. D-5
  4. C-4
  5. E-5

✓ Answer: 1. D-4

Explanation: Both the letter position and the number decrease by 3: P(16)-3=M(13), M-3=J(10), J-3=G(7), G-3=D(4). Therefore, D-4.

Q60. A, C, F, J, O, U, ?

  1. A
  2. B
  3. C
  4. D
  5. E

✓ Answer: 3. C

Explanation: Positions are 1, 3, 6, 10, 15, 21. The gaps are +2, +3, +4, +5, +6. The next gap is +7, giving 28. After cyclic movement through the alphabet, 28 corresponds to B. Therefore, the correct option is B.

Common Traps in Letter and Symbol Series

  • Assuming a fixed gap: Some series use increasing or decreasing gaps.
  • Ignoring alternate terms: An irregular sequence may contain two simple interleaved series.
  • Counting alphabet positions incorrectly: Convert letters carefully into numerical positions.
  • Ignoring multiple components: Analyse every character position separately.
  • Mixing letter and number rules: First analyse the components independently.
  • Ignoring cyclic movement: Some sequences continue from Z back to A.
  • Overlooking term length: Continuous series may increase the number of letters in each term.
  • Focusing on only one transition: A valid rule should explain the complete sequence.
  • Overcomplicating a simple pattern: Always test basic forward, backward, and fixed-gap rules first.

Fast Strategy for Solving Series Questions

  1. Identify the type: Alphabet, continuous, mixed, or symbol.
  2. Convert: Write alphabet positions when the pattern is not obvious.
  3. Check simple gaps: Test +1, +2, +3, -1, -2, -3 and similar intervals.
  4. Check changing gaps: Look for increasing or decreasing differences.
  5. Split the sequence: Try odd and even positions when necessary.
  6. Separate components: Analyse each letter, number, or symbol feature independently.
  7. Look for repetition: Find continuous or repeating blocks.
  8. Verify: Make sure the same rule explains all visible terms.
  9. Eliminate: Remove options that violate the established pattern.
  10. Answer: Select the option that satisfies the complete rule.

10-Second Test

Ask these five questions:

1. Are the letters moving forward or backward?
2. Is the gap fixed or changing?
3. Could there be two interleaved series?
4. Do the letters, numbers, or symbols follow separate patterns?
5. Does my rule explain every visible term?

LearnFrenzy Golden Rule

Do not guess the missing term. Identify the pattern, simplify the sequence, verify the rule across all terms, and then select the answer.

Final Revision: For Letter and Symbol Series, remember the sequence Identify → Convert → Compare → Split → Analyse → Verify → Answer. Mastering these steps will help you solve both straightforward and advanced series questions quickly and accurately.

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