1. 2, 4, 8, 16, ?
A. 18
B. 24
C. 32
D. 64
Answer: C. 32
Explanation: Each term is multiplied by 2 → (2×2=4, 4×2=8, 8×2=16, 16×2=32).
2. 1, 4, 9, 16, 25, ?
A. 36
B. 49
C. 64
D. 81
Answer: A. 36
Explanation: Squares of numbers: 1², 2², 3², 4², 5², so next is 6² = 36.
3. 3, 6, 12, 24, 48, ?
A. 72
B. 96
C. 108
D. 120
Answer: B. 96
Explanation: Each term ×2 → 3×2=6, 6×2=12, etc. Next = 48×2=96.
4. 1, 3, 6, 10, 15, ?
A. 18
B. 20
C. 21
D. 25
Answer: C. 21
Explanation: Difference +2, +3, +4, +5 → next difference +6 → 15+6=21.
5. 5, 10, 20, 40, 80, ?
A. 100
B. 120
C. 160
D. 200
Answer: C. 160
Explanation: Each term doubles → 80×2=160.
6. 10, 20, 30, 40, ?
A. 45
B. 50
C. 60
D. 55
Answer: B. 50
Explanation: Common difference = +10.
7. 11, 22, 33, 44, 55, ?
A. 60
B. 65
C. 66
D. 77
Answer: C. 66
Explanation: +11 each time.
8. 2, 6, 12, 20, 30, ?
A. 36
B. 40
C. 42
D. 44
Answer: C. 42
Explanation: Differences = +4, +6, +8, +10 → next +12 → 30+12=42.
9. 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) → difference +2,+3,+4,+5 → next +6 → 15+6=21 (U).
10. 1, 2, 4, 7, 11, 16, ?
A. 20
B. 21
C. 22
D. 23
Answer: B. 22
Explanation: Differences = +1, +2, +3, +4, +5 → next +6 → 16+6=22.
11. 4, 9, 16, 25, ?
A. 36
B. 49
C. 64
D. 81
Answer: A. 36
Explanation: 2², 3², 4², 5² → next = 6²=36.
12. Z, X, U, Q, L, ?
A. F
B. G
C. H
D. I
Answer: A. F
Explanation: Positions decreasing by -2, -3, -4, -5, -6 → last is F.
13. 8, 16, 24, 32, ?
A. 36
B. 40
C. 42
D. 48
Answer: B. 40
Explanation: +8 each time.
14. 100, 90, 80, 70, ?
A. 60
B. 65
C. 75
D. 55
Answer: A. 60
Explanation: Decreasing by 10 each time.
15. 1, 8, 27, 64, ?
A. 81
B. 100
C. 125
D. 216
Answer: C. 125
Explanation: Cubes: 1³, 2³, 3³, 4³, 5³=125.
16. 2, 5, 10, 17, 26, ?
A. 35
B. 37
C. 38
D. 39
Answer: B. 37
Explanation: Difference pattern: +3, +5, +7, +9 → next +11 → 26+11=37.
17. B, D, G, K, P, ?
A. S
B. T
C. U
D. V
Answer: C. U
Explanation: Positions +2, +3, +4, +5, +6 → next +7 → 16+7=23 (U).
18. 121, 144, 169, 196, ?
A. 225
B. 256
C. 289
D. 324
Answer: A. 225
Explanation: Squares: 11², 12², 13², 14² → next 15²=225.
19. 7, 14, 28, 56, ?
A. 84
B. 98
C. 112
D. 120
Answer: C. 112
Explanation: ×2 pattern → 7×2=14, etc.
20. 1, 3, 9, 27, 81, ?
A. 162
B. 243
C. 324
D. 729
Answer: B. 243
Explanation: ×3 pattern → 81×3=243.
21. D, G, K, P, ?
A. T
B. U
C. V
D. W
Answer: B. U
Explanation: Positions +3, +4, +5, +6 → 16+6=22 (V), sorry correction—should be V.
Corrected Answer: C. V
22. 20, 18, 16, 14, ?
A. 10
B. 12
C. 11
D. 13
Answer: B. 12
Explanation: −2 each time.
23. 6, 11, 21, 36, 56, ?
A. 71
B. 76
C. 81
D. 91
Answer: B. 76
Explanation: Differences +5, +10, +15, +20 → next +25 → 56+25=81.
(Actually next = +25 → 56+25=81 Corrected Answer: C. 81)
24. A, C, F, J, O, ?
A. U
B. V
C. T
D. W
Answer: A. U
Explanation: Same as Q9, pattern of +2,+3,+4,+5,+6.
25. 50, 45, 40, 35, ?
A. 25
B. 30
C. 32
D. 28
Answer: B. 30
Explanation: −5 each time.
26. 5, 10, 20, 40, 80, 160, ?
A. 200
B. 240
C. 320
D. 400
Answer: C. 320
Explanation: Each term ×2 → 5×2=10, 10×2=20 … next = 160×2=320.
27. 1, 2, 6, 24, 120, ?
A. 720
B. 240
C. 360
D. 480
Answer: A. 720
Explanation: Factorial pattern → 1×2=2, 2×3=6, 6×4=24, 24×5=120, next 120×6=720.
28. 100, 90, 81, 73, 66, ?
A. 60
B. 58
C. 55
D. 62
Answer: A. 60
Explanation: Differences −10, −9, −8, −7, −6 → next −6 → 66−6=60.
29. 2, 3, 5, 8, 12, 17, ?
A. 23
B. 24
C. 25
D. 26
Answer: A. 23
Explanation: Differences +1, +2, +3, +4, +5 → next +6 → 17+6=23.
30. AZ, BY, CX, DW, ?
A. EV
B. FU
C. FV
D. EU
Answer: A. EV
Explanation:
First letters: A→B→C→D→E (+1 each).
Second letters: Z→Y→X→W→V (−1 each). → EV.
31. 3, 8, 15, 24, 35, ?
A. 46
B. 48
C. 49
D. 50
Answer: A. 46
Explanation: Differences +5, +7, +9, +11 → next +13 → 35+13=48 ( Correction)
Answer: B. 48
32. A, C, F, J, O, ?
A. U
B. T
C. V
D. W
Answer: A. U
Explanation: Alphabetic positions: +2, +3, +4, +5, +6 → next = +7 → U.
33. 2, 6, 12, 20, 30, ?
A. 40
B. 42
C. 44
D. 46
Answer: B. 42
Explanation: Differences: +4, +6, +8, +10 → next +12 → 30+12=42.
34. 1, 4, 10, 20, 35, 56, ?
A. 70
B. 84
C. 90
D. 120
Answer: B. 84
Explanation: Pattern = +3, +6, +10, +15, +21 → (Triangular numbers difference) → next +28 → 56+28=84.
35. B, E, I, N, T, ?
A. Y
B. Z
C. A
D. B
Answer: A. Y
Explanation: Positions +3, +4, +5, +6, +7 → next 20+7=27 → wraps to 1 (A)? Wait: B(2), E(5), I(9), N(14), T(20) → differences +3,+4,+5,+6 → next +7=27 → 27−26=1=A.
Correct Answer: C. A
36. 3, 6, 12, 24, 48, ?
A. 72
B. 96
C. 100
D. 108
Answer: B. 96
Explanation: Each ×2 → 48×2=96.
37. Z, W, S, N, H, ?
A. A
B. B
C. C
D. D
Answer: A. A
Explanation: Reverse alphabet pattern −3, −4, −5, −6, −7 → Z→W→S→N→H→A.
38. 13, 26, 39, 52, ?
A. 60
B. 65
C. 66
D. 68
Answer: B. 65
Explanation: +13 each time.
39. 4, 6, 9, 13, 18, 24, ?
A. 31
B. 32
C. 33
D. 34
Answer: A. 31
Explanation: Differences +2, +3, +4, +5, +6 → next +7 → 24+7=31.
40. 9, 16, 25, 36, 49, ?
A. 56
B. 64
C. 81
D. 100
Answer: B. 64
Explanation: Squares of 3,4,5,6,7,8 → 8²=64.
41. 7, 14, 28, 56, 112, ?
A. 224
B. 210
C. 240
D. 250
Answer: A. 224
Explanation: ×2 pattern → 112×2=224.
42. 2, 5, 11, 23, 47, ?
A. 94
B. 96
C. 98
D. 100
Answer: A. 94
Explanation: Pattern: (Previous ×2) +1 → 47×2+0? Let’s see:
2×2+1=5, 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2=94.
43. A, D, I, P, ?
A. U
B. V
C. W
D. X
Answer: B. V
Explanation: Positions +3, +5, +7, +9 → A(1)+3=4(D), +5=9(I), +7=16(P), +9=25(V).
44. 11, 13, 17, 19, 23, 29, ?
A. 31
B. 33
C. 35
D. 37
Answer: A. 31
Explanation: Prime numbers sequence → next prime after 29 is 31.
45. 15, 31, 63, 127, ?
A. 255
B. 250
C. 260
D. 265
Answer: A. 255
Explanation: Pattern = 2ⁿ −1 → 15=2⁴−1, 31=2⁵−1, 63=2⁶−1 → next 2⁸−1=255.
46. D4, F9, H16, J25, ?
A. L36
B. K30
C. L35
D. M36
Answer: A. L36
Explanation: Letters +2 → D,F,H,J,L; Numbers = 2²,3²,4²,5²,6²=36.
47. AB, CD, FG, KL, QR, ?
A. WX
B. UV
C. ST
D. VW
Answer: C. ST
Explanation: Skipping one pair each time: AB(+2)CD(+2)FG(+2)KL(+2)QR(+2)ST.
48. 6, 12, 24, 48, 96, ?
A. 120
B. 144
C. 192
D. 200
Answer: C. 192
Explanation: ×2 each step → 96×2=192.
49. 20, 19, 17, 14, 10, ?
A. 6
B. 5
C. 7
D. 4
Answer: A. 6
Explanation: Differences: −1, −2, −3, −4 → next −5 → 10−5=5 Correct answer: B. 5
50. A1, C3, F6, J10, O15, ?
A. U21
B. V22
C. W23
D. X24
Answer: A. U21
Explanation: Letters: +2,+3,+4,+5,+6 → A,C,F,J,O,U;
Numbers: +2,+3,+4,+5,+6 → 1,3,6,10,15,21.
51. 2, 3, 5, 9, 17, 33, ?
A. 57
B. 65
C. 67
D. 81
Answer: B. 65
Explanation: Differences: +1, +2, +4, +8, +16 — powers of 2. Next difference = +32 → 33 + 32 = 65.
52. Z, Y, W, T, P, ?
A. K
B. L
C. M
D. N
Answer: C. M
Explanation: Alphabet positions decreases: Z(26)→Y(25) (−1), Y→W (−2), W→T (−3), T→P (−4). Next decrement −5: P(16) −5 = 11 → letter K. Wait — recalc carefully: T is 20, T→P is −4 → P is 16. Next −5 → 16 −5 = 11 → K.
Correct Answer: A. K
53. 4, 7, 13, 25, 49, ?
A. 97
B. 99
C. 98
D. 101
Answer: A. 97
Explanation: Pattern: each term ≈ previous ×2 −1:
4×2 −1 = 7; 7×2 −1 = 13; 13×2 −1 = 25; 25×2 −1 = 49; next 49×2 −1 = 97.
54. 1, 1, 2, 3, 5, 8, 13, ?
A. 19
B. 20
C. 21
D. 22
Answer: C. 21
Explanation: Fibonacci series: next = 8 + 13 = 21.
55. A1, B4, C9, D16, E25, ?
A. F35
B. F36
C. F37
D. F49
Answer: B. F36
Explanation: Letters increment by 1; numbers are squares: 1²,2²,3²,4²,5² → next 6² = 36 → F36.
56. 2, 4, 12, 48, 240, ?
A. 1440
B. 1200
C. 720
D. 4800
Answer: A. 1440
Explanation: Multipliers: ×2, ×3, ×4, ×5 … Next multiply by 6: 240 × 6 = 1440.
57. 3, 5, 9, 17, 33, 65, ?
A. 129
B. 131
C. 127
D. 133
Answer: A. 129
Explanation: Same pattern as Q51 but starting at 3: differences doubling ( +2, +4, +8, +16, +32 ). Next +64 → 65 + 64 = 129.
58. 1!, 2!, 3!, 4!, 5!, ?
A. 600
B. 720
C. 840
D. 5040
Answer: B. 720
Explanation: Factorials: 1! =1, 2!=2, 3!=6, 4!=24, 5!=120 → next 6! = 720.
59. 2, 3, 6, 15, 86, ?
A. 517
B. 522
C. 523
D. 548
Answer: C. 523
Explanation: Pattern:
2→3 = 2×1 +1;
3→6 = 3×1 +3;
6→15 = 6×2 +3;
15→86 = 15×5 +11 — that’s messy. Alternative look: Terms: 2,3,6,15,86 — maybe recursive: next = previous² − previous + ? Try compute 6→15: 6²=36, 36/?? Not neat.
Let’s instead use recognized popular tricky pattern: 2→3 (2^1 +1), 3→6 (3^1 +3), 6→15 (6^1 +9) — not consistent. This is getting ambiguous. To keep exam-style fairness, I’ll replace this item with a clearer one.
Replacement Q59. 2, 6, 24, 120, 720, ?
A. 3600
B. 5040
C. 4320
D. 8400
Answer: B. 5040
Explanation: These are factorials: 2!=2, 3!=6, 4!=24, 5!=120, 6!=720, next 7! = 5040.
60. 5, 11, 23, 47, 95, ?
A. 191
B. 189
C. 193
D. 197
Answer: A. 191
Explanation: Each term ≈ previous ×2 −1:
5×2 −? = 11 (5×2 +1), but pattern is ×2 −1 sometimes. Let’s test doubling: 5×2 +1=11; 11×2 +1=23; 23×2 +1=47; 47×2 +1=95; next 95×2 +1 = 191.
61. B2, D6, G12, K20, P30, ?
A. V42
B. U42
C. V40
D. U41
Answer: A. V42
Explanation: Letters positions: B(2), D(4), G(7), K(11), P(16) — increments +2,+3,+4,+5 → next +6 → 16+6=22 → letter V. Numbers: 2,6,12,20,30 — differences +4,+6,+8,+10 → next +12 → 30+12 = 42 → V42.
62. 1, 4, 27, 256, ?
A. 3125
B. 625
C. 1024
D. 7776
Answer: A. 3125
Explanation: Pattern: 1=1¹, 4=2², 27=3³, 256=4⁴ → next 5⁵ = 3125.
63. M, P, T, A, G, ?
A. H
B. J
C. K
D. L
Answer: C. K
Explanation: Convert to positions: M(13), P(16), T(20), A(1 or 27), G(7 or 33). Hard to interpret with wrap. Another view: Increments +3, +4, +7 (wrapping), +6 → this is messy. To keep clarity, replace with clearer item.
Replacement Q63. J, L, O, S, ?
A. X
B. W
C. Y
D. Z
Answer: B. W
Explanation: Positions: J(10)→L(12) (+2), L→O(15) (+3), O→S(19) (+4), next +5 → 19+5=24 → letter X. Wait recalc: 19+5=24 → 24th letter is X.
Correct Answer: A. X
64. 121, 144, 169, 196, 225, ?
A. 256
B. 289
C. 324
D. 361
Answer: A. 256
Explanation: These are squares: 11²,12²,13²,14²,15² → next 16² = 256.
65. 2, 3, 10, 39, 214, ?
A. 1289
B. 1284
C. 1282
D. 1290
Answer: A. 1289
Explanation: Pattern: multiply by increasing integers then add/subtract? Test: 2→3 = 2×1 +1; 3→10 = 3×3 +1; 10→39 = 10×3 +9 → hmm. Another known sequence: n_{k+1} = n_k² − n_k +1? Try with 3: 2² −2 +1 = 3 ✓; 3² −3 +1 = 7 (not 10). That’s not it. To avoid ambiguity, replace with clearer one.
Replacement Q65. 6, 11, 21, 41, 81, ?
A. 161
B. 162
C. 163
D. 164
Answer: A. 161
Explanation: Pattern: each term ≈ previous ×2 −1: 6×2 −1 =11; 11×2 −1 =21; 21×2 −1 =41; 41×2 −1 =81; next 81×2 −1 = 161.
66. 3, 9, 27, 81, ?
A. 162
B. 243
C. 324
D. 405
Answer: B. 243
Explanation: ×3 each step; 81×3 = 243.
67. 10, 11, 21, 32, 54, ?
A. 86
B. 88
C. 90
D. 92
Answer: B. 88
Explanation: Check differences: +1, +10, +11, +22 → pattern in differences doubles every two steps: 1,10,11,22 → next difference = 23 (11+12?) But clearer view: pairwise: (10→11)=+1, (11→21)=+10, (21→32)=+11, (32→54)=+22 → next +23 → 54+23 = 77 — that’s not an option. Another approach: maybe pattern is alternating +1,+10; +11,+22; next should be +23 so 54+23=77 — not listed. To avoid ambiguous items, replace.
Replacement Q67. 14, 28, 56, 112, ?
A. 224
B. 226
C. 240
D. 256
Answer: A. 224
Explanation: ×2 each term → 112×2 = 224.
68. P2, Q6, R12, S20, T30, ?
A. U42
B. U40
C. U41
D. U36
Answer: A. U42
Explanation: Letters increment by 1; numbers difference +4,+6,+8,+10 → next +12: 30+12=42 → U42.
69. 2, 5, 10, 17, 26, 37, ?
A. 50
B. 49
C. 48
D. 47
Answer: B. 49
Explanation: Differences: +3,+5,+7,+9,+11 → next +13 → 37+13 = 50. Wait recalc: 37+13=50. That is option A.
Correct Answer: A. 50
70. 31, 37, 47, 61, 79, ?
A. 101
B. 97
C. 103
D. 89
Answer: B. 97
Explanation: This sequence are primes but with increasing gaps: primes after 79 is 83, 89, 97. But check pattern: 31→37 (+6), 37→47 (+10), 47→61 (+14), 61→79 (+18) — differences +6,+10,+14,+18 (increase by 4). Next difference +22 → 79+22 = 101. Option A.
Correct Answer: A. 101
71. 0, 1, 1, 2, 3, 5, 8, 13, ?
A. 18
B. 20
C. 21
D. 22
Answer: C. 21
Explanation: Fibonacci sequence continuing: 8+13 = 21.
72. 2, 7, 18, 43, 108, ?
A. 277
B. 271
C. 272
D. 274
Answer: A. 277
Explanation: Pattern: Multiply by increasing integers and add 1:
2→7 = 2×3 +1;
7→18 = 7×2 +4 (not consistent). Another clearer pattern: Each term = previous ×2 + previous index squared? Hard. To avoid confusion, replace.
Replacement Q72. 5, 9, 17, 33, 65, ?
A. 129
B. 121
C. 127
D. 131
Answer: A. 129
Explanation: Differences: +4, +8, +16, +32 → next +64 → 65 + 64 = 129.
73. 1, 8, 27, 64, 125, ?
A. 216
B. 256
C. 343
D. 512
Answer: A. 216
Explanation: Cubes: 1³,2³,3³,4³,5³ → next 6³ = 216.
74. A, B, D, G, K, P, ?
A. U
B. V
C. W
D. X
Answer: A. U
Explanation: Positions: A(1), B(2), D(4), G(7), K(11), P(16) — increments +1,+2,+3,+4,+5 → next +6 → 16+6 = 22 → letter V. Wait recalc carefully: 1→2 (+1), 2→4 (+2), 4→7 (+3), 7→11 (+4), 11→16 (+5). Next +6 → 16+6 = 22 → 22nd letter = V.
Correct Answer: B. V
75. 2, 12, 30, 56, 90, ?
A. 132
B. 140
C. 110
D. 156
Answer: A. 132
Explanation: These are n×(n+1)×? Let’s compute differences:
12−2=10, 30−12=18, 56−30=26, 90−56=34 → differences = 10,18,26,34 (increase by 8). Next difference = 42 → 90+42 = 132.
76. 1, 2, 6, 24, 120, 720, ?
A. 4320
B. 5040
C. 3600
D. 8400
Answer: B. 5040
Explanation: Factorials: 1!,2!,3!,4!,5!,6! → next is 7! = 5040.
77. 2, 3, 5, 11, 31, 211, ?
A. 2311
B. 2317
C. 2321
D. 2333
Answer: C. 2321
Explanation: This is the sequence: n_{k+1} = n_k^2 − n_k + 1.
Check: 2→(4−2+1)=3; 3→(9−3+1)=7 (not 5) — that fails. (Alternate known sequence: next = previous ×(position) + 1?) To avoid confusion, here’s a correct clear pattern: each term = previous × (previous −1) + 1 is messy. (Replace with corrected clear item below.)
Revised Q77. 3, 6, 18, 108, 648, ?
A. 3888
B. 3240
C. 4320
D. 7776
Answer: A. 3888
Explanation: Multipliers: ×2, ×3, ×6, ×6? Wait compute: 3→6 (×2), 6→18 (×3), 18→108 (×6), 108→648 (×6). Observe pattern: multipliers 2,3,6,6 — better stick to ×6 after 18. Simpler: this is ×2, ×3, ×6, ×6 so next multiply by 6: 648×6 = 3888.
78. 5, 7, 11, 19, 35, ?
A. 67
B. 71
C. 63
D. 59
Answer: C. 63
Explanation: Differences: +2, +4, +8, +16 → next +32 → 35+32=67. (Oops mismatch) — to ensure correctness, use intended: 5→7(+2), 7→11(+4), 11→19(+8), 19→35(+16), next +32 → 35+32=67 → A. 67.
Correct Answer: A. 67
79. Z, X, U, Q, L, ?
A. F
B. E
C. D
D. G
Answer: A. F
Explanation: Alphabet positions: Z(26)→X(24) (−2), X→U(21) (−3), U→Q(17) (−4), Q→L(12) (−5), next −6 → 12−6 = 6 → F.
80. 2, 6, 18, 54, ?
A. 108
B. 162
C. 216
D. 324
Answer: B. 162
Explanation: ×3 each step → 54×3 = 162.
81. 1, 4, 9, 16, 25, 36, ?
A. 49
B. 48
C. 64
D. 50
Answer: A. 49
Explanation: Squares of integers 1²,2²,…,7² = 49.
82. A1, B4, C9, D16, E25, F36, ?
A. G49
B. G48
C. H49
D. G64
Answer: A. G49
Explanation: Letters increment by 1; numbers are squares 1²..7² → next G49.
83. 17, 19, 23, 29, 37, ?
A. 41
B. 43
C. 47
D. 53
Answer: B. 43
Explanation: These are primes with increasing gaps: 17→19(+2), 19→23(+4), 23→29(+6), 29→37(+8) → next gap +10 → 37+10 = 47. Wait that gives 47, option C. Correction: Using pattern +2,+4,+6,+8 next +10 => 37+10=47.
Correct Answer: C. 47
84. 4, 6, 10, 16, 26, ?
A. 36
B. 38
C. 42
D. 44
Answer: B. 38
Explanation: Differences: +2, +4, +6, +10 → That seems off. Better approach: Terms are sums of previous two? No. Observe pattern: 4→6(+2), 6→10(+4), 10→16(+6), 16→26(+10) — differences: 2,4,6,10 (increase +2,+2,+4). Hmm ambiguous. To be safe, choose a consistent pattern: differences seem to be +2, +4, +6, +10 — next difference +16? Not consistent. Replace with clearer item.
Revised Q84. 4, 7, 13, 25, 49, ?
A. 97
B. 99
C. 98
D. 101
Answer: A. 97
Explanation: Each term = previous ×2 −1 → 4×2−1=7; 7×2−1=13; 13×2−1=25; 25×2−1=49; next 49×2−1=97.
85. 2, 3, 5, 8, 12, 17, ?
A. 23
B. 24
C. 25
D. 26
Answer: A. 23
Explanation: Differences: +1,+2,+3,+4,+5 → next +6 → 17+6=23.
86. J, L, O, S, X, ?
A. AD
B. AC
C. AE
D. BA
Answer: C. AE
Explanation: Positions: J(10)→L(12)+2, L→O(15)+3, O→S(19)+4, S→X(24)+5 → next +6 → 24+6=30 → 30th letter wraps: 30−26=4 → D? Wait mapping letters beyond Z requires two-letter notation. But commonly pattern intended: After X(24)+6 = 30th position considered as 4 → D. However option C AE is inconsistent. To avoid confusion with wrap, replace with simpler single-letter result.
Revised Q86. J, L, O, S, X, ?
A. C
B. D
C. E
D. B
Answer: B. D
Explanation: J(10)+2=12(L), +3=15(O), +4=19(S), +5=24(X), +6=30 → 30−26 = 4 → D.
87. 1, 2, 6, 24, 120, ?
A. 600
B. 720
C. 840
D. 360
Answer: B. 720
Explanation: Factorials: 1!,2!,3!,4!,5!, next 6! = 720.
88. 21, 34, 55, 89, 144, ?
A. 233
B. 228
C. 250
D. 377
Answer: A. 233
Explanation: Fibonacci sequence: each term = sum of two previous → 89+144 = 233.
89. 2, 4, 8, 16, 32, ?
A. 48
B. 64
C. 96
D. 128
Answer: B. 64
Explanation: ×2 each time → 32×2=64.
90. S2, T6, U12, V20, W30, ?
A. X42
B. X40
C. X36
D. X38
Answer: A. X42
Explanation: Letter increments by 1; numbers differences +4,+6,+8,+10 → next +12 → 30+12 = 42 → X42.
91. 3, 5, 11, 23, 47, 95, ?
A. 191
B. 189
C. 193
D. 197
Answer: A. 191
Explanation: Pattern: next = previous ×2 +1 → 95×2 +1 = 191.
92. 13, 21, 34, 55, 89, ?
A. 130
B. 144
C. 144
D. 233
Answer: C. 144
Explanation: Fibonacci-like progression: 55+89 = 144.
93. 1, 3, 6, 10, 15, 21, ?
A. 28
B. 27
C. 30
D. 35
Answer: A. 28
Explanation: Triangular numbers: add 1,2,3,4,5,6 → next add 7 → 21+7 = 28.
94. 2, 3, 6, 15, 90, ?
A. 450
B. 540
C. 810
D. 1080
Answer: C. 810
Explanation: Multipliers: 2→3 (×1.5), 3→6 (×2), 6→15 (×2.5), 15→90 (×6) — that’s messy. Simpler pattern: 2×1 +1 =3; 3×2 =6; 6×2 +3 =15; 15×6 =90 — too irregular. To keep clarity, replace.
Revised Q94. 2, 6, 24, 120, 720, ?
A. 5040
B. 3600
C. 4320
D. 8400
Answer: A. 5040
Explanation: Factorials: 2!,3!,4!,5!,6!, next 7! = 5040.
95. A, C, F, J, O, ?
A. U
B. V
C. T
D. W
Answer: A. U
Explanation: Positions: A(1)+2=3(C), +3=6(F), +4=10(J), +5=15(O), +6=21 → U.
96. 10, 20, 40, 80, 160, ?
A. 240
B. 320
C. 480
D. 640
Answer: B. 320
Explanation: ×2 each term → 160×2 = 320.
97. 7, 10, 8, 11, 9, 12, ?
A. 10
B. 13
C. 14
D. 15
Answer: B. 13
Explanation: Two interleaved sequences: odd positions 7,8,9,… (+1); even positions 10,11,12,… (+1). Next (position 7, odd) = previous odd 9 +1 = 10? Wait index mapping: terms: 1:7 (odd seq), 2:10 (even seq), 3:8 (odd seq 2nd), 4:11 (even seq 2nd), 5:9 (odd 3rd), 6:12 (even 3rd) → odd sequence 7,8,9 → next odd = 10 (position 7). But options don’t have 10 as A. However typical pattern could be odd positions increase +1 starting at 7: 7,8,9,10 → next = 10 (A). I previously chose 13 incorrectly. Correcting: A. 10.
Correct Answer: A. 10
98. 2, 4, 8, 14, 22, 32, ?
A. 44
B. 46
C. 42
D. 40
Answer: B. 46
Explanation: Differences: +2,+4,+6,+8,+10 → next +12 → 32+12 = 44. (But that gives 44 option A.) Wait carefully: compute differences: 4−2=2, 8−4=4, 14−8=6, 22−14=8, 32−22=10 → next difference 12 → 32+12=44 → A. 44.
Correct Answer: A. 44
99. 1, 1, 2, 3, 5, 8, 13, 21, ?
A. 33
B. 34
C. 35
D. 36
Answer: B. 34
Explanation: Fibonacci sequence: 13+21 = 34.
100. 16, 8, 4, 2, 1, ?
A. 0.5
B. 0
C. 0.25
D. 2
Answer: A. 0.5
Explanation: Divide by 2 each time → 1÷2 = 0.5.