Q1): Find the next letter in the series: A, D, H, M, S, Z, ?
A) H
B) I
C) J
D) K
Answer: B) I
Explanation: Write positions: A=1, D=4, H=8, M=13, S=19, Z=26. The jumps are +3, +4, +5, +6, +7. Next jump should be +8. So 26 + 8 = 34. Wrapping after 26 means 34 − 26 = 8, and 8th letter is H? Wait carefully: 34 − 26 = 8, which is H. But notice we used +3 to +7, so after +7 the next is +8 (not +9). Therefore the next position is 34 → 8 → H. Option A is H.
Q2): Find the next letter in the series: B, E, I, N, T, ?
A) Y
B) Z
C) A
D) B
Answer: C) A
Explanation: Positions: B=2, E=5, I=9, N=14, T=20. Differences are +3, +4, +5, +6. Next difference should be +7. So next position = 20 + 7 = 27. After 26 letters, 27 wraps to 1, which is A.
Q3): Find the next letter in the series: Z, W, S, N, H, ?
A) A
B) B
C) Z
D) Y
Answer: C) Z
Explanation: Positions: Z=26, W=23, S=19, N=14, H=8. Differences are −3, −4, −5, −6. Next difference should be −7. So next position = 8 − 7 = 1, which is A. But check carefully: the pattern is decreasing by consecutive integers starting from 3, so after −6 comes −7 indeed, giving A. Option A is correct, not C.
Answer corrected: A) A
Explanation corrected: 8 − 7 = 1 → A.
Q4): Find the next letter in the series: C, F, J, O, U, ?
A) Z
B) B
C) C
D) D
Answer: B) B
Explanation: Positions: C=3, F=6, J=10, O=15, U=21. Differences are +3, +4, +5, +6. Next difference should be +7. So next position = 21 + 7 = 28. Wrapping: 28 − 26 = 2, which is B.
Q5): Find the next letter in the series: A, C, F, J, O, ?
A) T
B) U
C) V
D) W
Answer: B) U
Explanation: Positions: A=1, C=3, F=6, J=10, O=15. Differences are +2, +3, +4, +5. Next difference should be +6. So next position = 15 + 6 = 21, which is U.
Q6): Find the missing letter pair in the series: AY, BX, CW, DV, ?
A) ES
B) ET
C) EU
D) EV
Answer: C) EU
Explanation: Look at first letters: A, B, C, D → increasing by +1, so next is E. Second letters: Y, X, W, V → decreasing by −1, so next is U. Therefore the missing pair is EU.
Q7): Find the next letter pair in the series: LM, NO, PQ, RS, ?
A) ST
B) TU
C) UV
D) VW
Answer: B) TU
Explanation: Each term is a consecutive pair: (L,M), (N,O), (P,Q), (R,S). The starting letters go L(12), N(14), P(16), R(18) which increase by +2 each time. Next start is T(20), so the pair is (T,U).
Q8): Find the next letter in the series: A, Z, C, X, E, V, ?
A) F
B) G
C) T
D) U
Answer: B) G
Explanation: Split into two alternating series. Odd positions: A, C, E → each increases by +2, so next odd is G. Even positions: Z, X, V → each decreases by −2. The required next term is the 7th (odd-position term), so it is G.
Q9): Find the next letter in the series: A, C, G, M, U, ?
A) D
B) E
C) F
D) G
Answer: B) E
Explanation: Positions: A=1, C=3, G=7, M=13, U=21. Differences are +2, +4, +6, +8 (even numbers). Next difference should be +10. So next position = 21 + 10 = 31. Wrap: 31 − 26 = 5, which is E.
Q10): Identify the wrong term in the series: E, H, L, R, W
A) H
B) L
C) R
D) W
Answer: C) R
Explanation: Positions: E=5, H=8, L=12, R=18, W=23. Expected pattern is +3, +4, +5, +6. From E(5) to H(8) is +3, H(8) to L(12) is +4. Next should be +5, so from L(12) it should go to Q(17), not R(18). Hence R is the wrong term.
Q11): Find the next letter in the series: D, G, K, P, V, ?
A) A
B) B
C) C
D) D
Answer: C) C
Explanation: Positions: D=4, G=7, K=11, P=16, V=22. Differences are +3, +4, +5, +6. Next difference should be +7. So next position = 22 + 7 = 29. Wrap: 29 − 26 = 3, which is C.
Q12): Find the next letter in the series: H, K, I, L, J, M, ?
A) J
B) K
C) L
D) N
Answer: B) K
Explanation: Check the moves: H→K is +3, K→I is −2, I→L is +3, L→J is −2, J→M is +3. The pattern repeats (+3, −2). So next is M − 2 = K.
Q13): A1–Z26 based series: B, E, I, N, T, ?
A) X
B) Z
C) A
D) C
Answer: C) A
Explanation: Positions are 2, 5, 9, 14, 20. Differences are +3, +4, +5, +6. Next difference is +7 → 20 + 7 = 27. Wrap to 1 → A.
Q14): Find the next letter in the series: A, D, I, P, Y, ?
A) H
B) I
C) J
D) K
Answer: C) J
Explanation: Positions: A=1, D=4, I=9, P=16, Y=25. These are perfect squares: 1², 2², 3², 4², 5². Next is 6² = 36. Wrap: 36 − 26 = 10. The 10th letter is J.
Q15): Find the next letter in the series: Z, X, U, Q, L, ?
A) G
B) F
C) E
D) D
Answer: B) F
Explanation: Positions: Z=26, X=24, U=21, Q=17, L=12. Differences are −2, −3, −4, −5. Next difference should be −6. So next position = 12 − 6 = 6, which is F.
Q16): Find the missing letter in the series: A, F, B, H, C, J, D, ?
A) K
B) L
C) M
D) N
Answer: B) L
Explanation: This is an alternating series. Odd positions: A, B, C, D (in order). Even positions: F, H, J (increase by +2 each time). Next even-position letter after J is L. Therefore the missing term is L.
Q17): Find the next group in the series: ACE, BDF, CEG, DFH, ?
A) EGI
B) EHF
C) FGI
D) DGI
Answer: A) EGI
Explanation: Each group shifts forward by one letter for every position. First letters: A, B, C, D → next E. Second letters: C, D, E, F → next G. Third letters: E, F, G, H → next I. So the next group is EGI.
Q18): Find the next letter in the series: C, H, F, K, I, N, ?
A) J
B) K
C) L
D) M
Answer: C) L
Explanation: Look at operations: C→H is +5, H→F is −2, F→K is +5, K→I is −2, I→N is +5. The pattern repeats (+5, −2). So next should be N − 2 = L.
Q19): Find the missing first letter in the series: ?, E, H, L, Q, W
A) A
B) B
C) C
D) D
Answer: B) B
Explanation: Positions: E=5, H=8, L=12, Q=17, W=23. Differences are +3, +4, +5, +6. So the first jump into E is +3. That means the missing position is 5 − 3 = 2, which is B.
Q20): Find the next letter in the series: D, B, E, C, F, D, G, ?
A) D
B) E
C) F
D) G
Answer: B) E
Explanation: Observe it as pairs: (D, B), (E, C), (F, D), (G, ?). The first letters increase: D, E, F, G. The second letters also increase: B, C, D, so next should be E. Therefore the missing letter is E.