50 कठिन Repeated Number Series Questions with Answers and Tricks – CET/SSC/HCS के लिए उपयोगी हरियाणा CET, SSC, और HCS परीक्षा की तैयारी करें इन 50 Repeated Number Series प्रश्नों के साथ। हर प्रश्न के साथ उत्तर और विस्तृत Explanation दिया गया है। Patterns जैसे ×2, Fibonacci, Prime Series, Square Series और Difference Series को समझने के लिए यह पोस्ट बेहद उपयोगी है। Presented by GyaanPediya. Repeated Number Series Questions in Hindi, CET Reasoning Series, SSC Hard Level Number Series, Number Series Tricks in Hindi, CET 2025 Preparation, Haryana CET Number Series, GyaanPediya Reasoning Quiz, High Level Reasoning Practice, CET MCQ Reasoning, Number Series with Logic, Reasoning Series Questions
🔢 Q1. 2, 6, 12, ?, 30, 42
उत्तर: 20
Explanation: +4, +6, +8, +10…
2 → 6 → +6 = 12 → +8 = 20 → +10 = 30 → +12 = 42
🔢 Q2. 5, 11, 23, ?, 95
उत्तर: 47
Explanation: ×2 +1 → 5×2+1 = 11
11×2+1 = 23 → 23×2+1 = 47 → 47×2+1 = 95
🔢 Q3. 1, 4, 9, 16, ?, 36
उत्तर: 25
Explanation: Square series
1², 2², 3², 4², 5² = 25, 6² = 36
🔢 Q4. 3, 6, 18, ?, 540
उत्तर: 108
Explanation: ×2 → ×3 → ×6 → ×5
3×2 = 6 → 6×3 = 18 → 18×6 = 108 → 108×5 = 540
🔢 Q5. 81, 27, 9, ?, 1
उत्तर: 3
Explanation: ÷3 pattern
81 → 27 → 9 → 3 → 1
🔢 Q6. 2, 5, 10, 17, 26, ?
उत्तर: 37
Explanation: Difference series
+3, +5, +7, +9, +11 → 26+11 = 37
🔢 Q7. 1, 3, 6, 10, 15, ?
उत्तर: 21
Explanation: +2, +3, +4, +5, +6 → 15+6 = 21
🔢 Q8. 120, 60, 30, ?, 7.5
उत्तर: 15
Explanation: ÷2 pattern
120 ÷2 = 60 → 30 → 15 → 7.5
🔢 Q9. 7, 14, 28, ?, 112
उत्तर: 56
Explanation: ×2 pattern
7×2=14 → 14×2=28 → 28×2 = 56 → 56×2 = 112
🔢 Q10. 2, 3, 5, 8, 12, ?, 23
उत्तर: 17
Explanation: +1, +2, +3, +4, +5 → 12+5 = 17
🔢 Q11. 13, 16, 22, ?, 43
उत्तर: 31
Explanation: +3, +6, +9, +12 → 22+9 = 31
🔢 Q12. 1, 1, 2, 3, 5, ?, 13
उत्तर: 8
Explanation: Fibonacci Series
1, 1, 2, 3, 5, 8, 13
🔢 Q13. 2, 3, 5, 7, ?, 13
उत्तर: 11
Explanation: Prime Numbers Series
2, 3, 5, 7, 11, 13
🔢 Q14. 10, 20, ?, 80, 160
उत्तर: 40
Explanation: ×2 Pattern
10×2=20 → ×2=40 → ×2=80
🔢 Q15. 5, 9, 17, 33, ?
उत्तर: 65
Explanation: ×2 -1
5×2 -1 = 9 → 9×2 -1 = 17 → 17×2 -1 = 33 → 33×2 -1 = 65
🔢 Q16. 8, 24, 12, 36, 18, ?
उत्तर: 54
Explanation: Alternate: ×3
8, 12, 18 → +4, +6
24, 36, ? → +12, +18 → 54
🔢 Q17. 0, 1, 4, 9, ?, 25
उत्तर: 16
Explanation: Square Pattern
0², 1², 2², 3², 4² = 16, 5² = 25
🔢 Q18. 5, 10, 20, ?, 80
उत्तर: 40
Explanation: ×2 Series
5×2 = 10 → ×2 = 20 → ×2 = 40
🔢 Q19. 3, 6, 12, 24, ?, 96
उत्तर: 48
Explanation: ×2
3→6→12→24→48→96
🔢 Q20. 4, 8, 16, 32, ?, 128
उत्तर: 64
Explanation: ×2
4→8→16→32→64→128
🔢 Q21. 1, 4, 10, 19, ?, 46
उत्तर: 31
Explanation:
+3, +6, +9, +12 → 1+3=4 → 4+6=10 → 10+9=19 → 19+12=31 → 31+15=46
🔢 Q22. 6, 13, 27, ?, 111
उत्तर: 55
Explanation:
×2+1 → 6×2+1=13
13×2+1=27
27×2+1=55
55×2+1=111
🔢 Q23. 125, 64, 27, 8, ?
उत्तर: 1
Explanation:
Cubes in reverse:
5³ = 125, 4³ = 64, 3³ = 27, 2³ = 8, 1³ = 1
🔢 Q24. 50, 45, 35, 20, ?
उत्तर: -5
Explanation:
-5, -10, -15, -25
50-5=45 → 45-10=35 → 35-15=20 → 20-25 = -5
🔢 Q25. 3, 8, 15, 24, 35, ?
उत्तर: 48
Explanation:
+5, +7, +9, +11, +13
3+5=8 → 8+7=15 → 15+9=24 → 24+11=35 → 35+13=48
🔢 Q26. 1, 2, 6, 24, ?, 720
उत्तर: 120
Explanation:
Factorials:
1!=1, 2!=2, 3!=6, 4!=24, 5!=120, 6!=720
🔢 Q27. 9, 18, 21, 42, 45, ?
उत्तर: 90
Explanation:
Alternate ×2:
9×2=18, 21×2=42, 45×2=90
🔢 Q28. 100, 96, 88, ?, 64
उत्तर: 76
Explanation:
-4, -8, -12, -16
100-4=96 → 96-8=88 → 88-12=76 → 76-16=60
🔢 Q29. 1, 3, 7, 15, ?, 63
उत्तर: 31
Explanation:
×2 +1
1×2+1=3 → 3×2+1=7 → 7×2+1=15 → 15×2+1=31 → 31×2+1=63
🔢 Q30. 8, 12, 24, 60, ?, 420
उत्तर: 168
Explanation:
×1.5 → ×2 → ×2.5 → ×3 → ×3.5
60×2.8=168
🔢 Q31. 0, 3, 8, 15, 24, ?
उत्तर: 35
Explanation:
Diff: +3, +5, +7, +9, +11
0+3=3 → +5=8 → +7=15 → +9=24 → +11=35
🔢 Q32. 1, 8, 27, ?, 125
उत्तर: 64
Explanation:
Cubes: 1³, 2³, 3³, 4³=64, 5³=125
🔢 Q33. 1, 2, 4, 7, 11, ?
उत्तर: 16
Explanation:
+1, +2, +3, +4, +5
11+5 = 16
🔢 Q34. 6, 11, 21, 36, ?, 91
उत्तर: 66
Explanation:
+5 → +10 → +15 → +20
36+30 = 66
🔢 Q35. 11, 22, 44, ?, 176
उत्तर: 88
Explanation:
×2 pattern → 11×2=22 → ×2=44 → ×2=88
🔢 Q36. 3, 6, 12, 24, ?, 96
उत्तर: 48
Explanation:
×2 pattern
24×2 = 48
🔢 Q37. 2, 4, 7, 11, 16, ?
उत्तर: 22
Explanation:
+2, +3, +4, +5, +6
16+6 = 22
🔢 Q38. 2, 6, 18, ?, 162
उत्तर: 54
Explanation:
×3 pattern → 2×3=6 → ×3=18 → ×3=54
🔢 Q39. 1, 4, 10, 20, ?, 56
उत्तर: 35
Explanation:
Diff: +3, +6, +10, +15
→ 20+15 = 35
🔢 Q40. 7, 14, 28, 56, ?, 224
उत्तर: 112
Explanation:
×2 pattern
56×2 = 112
🔢 Q41. 81, 27, 9, 3, ?
उत्तर: 1
Explanation:
÷3 Pattern
3÷3 = 1
🔢 Q42. 10, 15, 30, 75, ?
उत्तर: 225
Explanation:
+5 → ×2 → +45 → ×3
75×3 = 225
🔢 Q43. 0, 1, 1, 2, 3, 5, ?
उत्तर: 8
Explanation:
Fibonacci Series
3+5 = 8
🔢 Q44. 3, 6, 12, 24, ?, 96
उत्तर: 48
Explanation:
×2 pattern again
🔢 Q45. 5, 10, 20, 40, ?
उत्तर: 80
Explanation:
×2 Series
40×2 = 80
🔢 Q46. 4, 8, 16, 32, ?, 128
उत्तर: 64
Explanation:
×2 Pattern
🔢 Q47. 9, 18, 36, ?, 144
उत्तर: 72
Explanation:
×2 Series
36×2 = 72
🔢 Q48. 6, 11, 21, 41, ?, 161
उत्तर: 81
Explanation:
+5, +10, +20, +40 → +80
41+40 = 81
🔢 Q49. 2, 3, 5, 7, 11, ?
उत्तर: 13
Explanation:
Prime Number Series
🔢 Q50. 1, 4, 9, 16, 25, ?
उत्तर: 36
Explanation:
Perfect Squares
6² = 36
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