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3. Number Series / संख्या श्रृंखला Test 18
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3. Number Series / संख्या श्रृंखला Test 18

Bilingual timed test with clean Hindi, preserved math symbols and detailed solutions.

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3. Number Series / संख्या श्रृंखला Test 18

25 bilingual MCQs from 3. Number Series / संख्या श्रृंखला, including 5 fresh LearnAtMyPlace original supplemental questions with detailed solutions. Symbols, Hindi text and equations are displayed with extra wrapping for mobile readability.

Questions
25
Duration
25 min
Marking
+1 / -0.25
Sections
3. Number Series / संख्या श्रृंखला | 25 questions

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Preview all 25 questions in 3. Number Series / संख्या श्रृंखला Test 18 (no login required)
  1. 3. Number Series / संख्या श्रृंखला — Number Series

    1. Find the next term: 2, 6, 12, 20, 30, 42, ? / अगला पद: 2, 6, 12, 20, 30, 42, ?

    • A. 52
    • B. 54
    • C. 56 (Correct)
    • D. 58

    Explanation: n(n+1): 7×8=56. / 7×8=56।

  2. 3. Number Series / संख्या श्रृंखला — Number Series

    2. Find the next term: 0, 3, 8, 15, 24, 35, ? / अगला पद: 0, 3, 8, 15, 24, 35, ?

    • A. 46
    • B. 48 (Correct)
    • C. 50
    • D. 52

    Explanation: n²−1: 7²−1=48. / 7²−1=48।

  3. 3. Number Series / संख्या श्रृंखला — Number Series

    3. Find the next term: 1, 6, 15, 28, 45, 66, ? / अगला पद: 1, 6, 15, 28, 45, 66, ?

    • A. 88
    • B. 90
    • C. 91 (Correct)
    • D. 92

    Explanation: 2n²−1: 2×49−1=97? Diff: 5,9,13,17,21,25→66+25=91. / 66+25=91।

  4. 3. Number Series / संख्या श्रृंखला — Number Series

    4. Find the next term: 5, 5, 10, 30, 120, ? / अगला पद: 5, 5, 10, 30, 120, ?

    • A. 240
    • B. 360
    • C. 480
    • D. 600 (Correct)

    Explanation: ×1,×2,×3,×4,×5. 120×5=600. / ×5=600।

  5. 3. Number Series / संख्या श्रृंखला — Number Series

    5. Find the next term: 3, 6, 4, 8, 6, 12, 10, ? / अगला पद: 3, 6, 4, 8, 6, 12, 10, ?

    • A. 16
    • B. 18
    • C. 20 (Correct)
    • D. 22

    Explanation: Odd: 3,4,6,10 (+1,+2,+4). Even: 6,8,12,20 (+2,+4,+8). Next even=20. / Next=20।

  6. 3. Number Series / संख्या श्रृंखला — Number Series

    6. Find the next term: 1, 2, 4, 7, 11, 16, 22, ? / अगला पद: 1, 2, 4, 7, 11, 16, 22, ?

    • A. 27
    • B. 28
    • C. 29 (Correct)
    • D. 30

    Explanation: Differences: 1,2,3,4,5,6,7. 22+7=29. / 22+7=29।

  7. 3. Number Series / संख्या श्रृंखला — Number Series

    7. Find the next: 2, 4, 12, 48, 240, ? / अगला पद: 2, 4, 12, 48, 240, ?

    • A. 960
    • B. 1200
    • C. 1440 (Correct)
    • D. 1680

    Explanation: ×2,×3,×4,×5,×6. 240×6=1440. / ×6=1440।

  8. 3. Number Series / संख्या श्रृंखला — Number Series

    8. Find the next term: 1, 3, 4, 7, 11, 18, ? / अगला पद: 1, 3, 4, 7, 11, 18, ?

    • A. 27
    • B. 28
    • C. 29 (Correct)
    • D. 30

    Explanation: Each = sum of two before: 11+18=29. / 11+18=29।

  9. 3. Number Series / संख्या श्रृंखला — Number Series

    9. Find the next term: 5, 7, 4, 8, 3, 9, 2, ? / अगला पद: 5, 7, 4, 8, 3, 9, 2, ?

    • A. 8
    • B. 10 (Correct)
    • C. 11
    • D. 12

    Explanation: Odd positions: 5,4,3,2 (−1 each). Even: 7,8,9,10 (+1 each). Next even=10. / 偶数位置: 10।

  10. 3. Number Series / संख्या श्रृंखला — Number Series

    10. Find the next term: 8, 5, 7, 4, 6, 3, 5, 2, ? / अगला पद: 8, 5, 7, 4, 6, 3, 5, 2, ?

    • A. 2
    • B. 3
    • C. 4 (Correct)
    • D. 5

    Explanation: Odd: 8,7,6,5,4 (−1). Even: 5,4,3,2 (−1). Next odd=4. / Next=4।

  11. 3. Number Series / संख्या श्रृंखला — Number Series

    11. Find the next term: 2, 3, 7, 13, 27, 53, ? / अगला पद: 2, 3, 7, 13, 27, 53, ?

    • A. 97
    • B. 101
    • C. 107 (Correct)
    • D. 109

    Explanation: Each ≈ 2×prev−prev₋₁+small. Diff: 1,4,6,14,26 — doubles: 2,3,7,13,27,53,107 (2×53+1=107). / 2×53+1=107।

  12. 3. Number Series / संख्या श्रृंखला — Number Series

    12. Which is the wrong term? 1, 3, 5, 9, 17, 33, 66 / गलत पद: 1, 3, 5, 9, 17, 33, 66

    • A. 33
    • B. 65
    • C. 66 (Correct)
    • D. 17

    Explanation: ×2−1: 33×2−1=65≠66. Wrong=66. / 65 होना चाहिए।

  13. 3. Number Series / संख्या श्रृंखला — Number Series

    13. Which is the wrong term? 2, 4, 8, 16, 32, 64, 128, 254 / गलत पद: 2, 4, 8, 16, 32, 64, 128, 254

    • A. 64
    • B. 128
    • C. 254 (Correct)
    • D. 32

    Explanation: GP r=2: 128×2=256≠254. Wrong=254. / 256 होना चाहिए।

  14. 3. Number Series / संख्या श्रृंखला — Number Series

    14. Which is the wrong term? 1, 2, 6, 24, 120, 720, 5040, 40319 / गलत पद: 1, 2, 6, 24, 120, 720, 5040, 40319

    • A. 40319 (Correct)
    • B. 5040
    • C. 720
    • D. 120

    Explanation: Factorials: 8!=40320≠40319. / 8!=40320।

  15. 3. Number Series / संख्या श्रृंखला — Number Series

    15. Which is the wrong term? 3, 7, 15, 27, 63, 127, 255 / गलत पद: 3, 7, 15, 27, 63, 127, 255

    • A. 3
    • B. 15
    • C. 27 (Correct)
    • D. 63

    Explanation: 2ⁿ+1: 3,7,15,31,63,127,255. 27≠31. Wrong=27. / 27 → 31 होना चाहिए।

  16. 3. Number Series / संख्या श्रृंखला — Number Series

    16. Which is the wrong term? 1, 4, 9, 16, 25, 36, 50 / गलत पद: 1, 4, 9, 16, 25, 36, 50

    • A. 16
    • B. 25
    • C. 36
    • D. 50 (Correct)

    Explanation: n²: 7²=49≠50. Wrong=50. / 49 होना चाहिए।

  17. 3. Number Series / संख्या श्रृंखला — Number Series

    17. Which is the wrong term? 2, 5, 11, 23, 47, 96, 191 / गलत पद: 2, 5, 11, 23, 47, 96, 191

    • A. 47
    • B. 96 (Correct)
    • C. 191
    • D. 23

    Explanation: ×2+1: 47×2+1=95≠96. Wrong=96. / 95 होना चाहिए।

  18. 3. Number Series / संख्या श्रृंखला — Number Series

    18. Which is the wrong term? 5, 10, 20, 40, 80, 140, 320 / गलत पद: 5, 10, 20, 40, 80, 140, 320

    • A. 10
    • B. 40
    • C. 140 (Correct)
    • D. 320

    Explanation: GP r=2: 80×2=160≠140. Wrong=140. / 160 होना चाहिए।

  19. 3. Number Series / संख्या श्रृंखला — Number Series

    19. Which is the wrong term? 11, 14, 19, 22, 27, 30, 36 / गलत पद: 11, 14, 19, 22, 27, 30, 36

    • A. 11
    • B. 22
    • C. 30
    • D. 36 (Correct)

    Explanation: Alt +3,+5 pattern: 11,14,19,22,27,30,35. 36≠35. / 35 होना चाहिए।

  20. 3. Number Series / संख्या श्रृंखला — Number Series

    20. Which is the wrong term? 8, 16, 24, 32, 42, 48, 56 / गलत पद: 8, 16, 24, 32, 42, 48, 56

    • A. 24
    • B. 32
    • C. 42 (Correct)
    • D. 48

    Explanation: Multiples of 8: ...32, 40, 48... 42≠40. / 40 होना चाहिए।

  21. 3. Number Series / संख्या श्रृंखला — Percentage / प्रतिशत

    21. 25% of 400 is: / 400 का 25% कितना है?

    • A. 90
    • B. 100 (Correct)
    • C. 110
    • D. 120

    Explanation: 25% = 25/100, so answer = 100. / प्रतिशत को 100 से भाग देकर मूल संख्या से गुणा करें।

  22. 3. Number Series / संख्या श्रृंखला — Profit-Loss / लाभ-हानि

    22. An article bought for Rs 850 is sold at 12.5% profit. Find SP. / Rs 850 में खरीदी वस्तु 12.5% लाभ पर बेची गई। SP ज्ञात करें।

    • A. Rs 916
    • B. Rs 956 (Correct)
    • C. Rs 996
    • D. Rs 1036

    Explanation: SP = CP x (100 + profit%)/100 = 850 x 112.5/100 = Rs 956. / लाभ प्रतिशत जोड़कर विक्रय मूल्य निकालें।

  23. 3. Number Series / संख्या श्रृंखला — Time & Work / समय और कार्य

    23. A finishes a work in 15 days and B in 21 days. Together they finish in: / A 15 दिन और B 21 दिन में काम पूरा करते हैं। साथ में समय?

    • A. 7.800000000000001 days
    • B. 8.8 days (Correct)
    • C. 9.8 days
    • D. 10.8 days

    Explanation: Combined time = ab/(a+b) = 15 x 21 / 36 = 8.8 days. / संयुक्त कार्य में दरें जोड़ी जाती हैं।

  24. 3. Number Series / संख्या श्रृंखला — Speed Conversion / चाल परिवर्तन

    24. 108 km/h equals: / 108 किमी/घंटा बराबर है:

    • A. 27 m/s
    • B. 30 m/s (Correct)
    • C. 33 m/s
    • D. 35 m/s

    Explanation: km/h to m/s conversion uses x 5/18. 108 x 5/18 = 30. / किमी/घंटा को मी/से में बदलने के लिए 5/18 से गुणा करें।

  25. 3. Number Series / संख्या श्रृंखला — Simplification / सरलीकरण

    25. Simplify: 26 x 15 + 26 - 15. / सरल करें: 26 x 15 + 26 - 15.

    • A. 393
    • B. 401 (Correct)
    • C. 409
    • D. 417

    Explanation: Apply BODMAS: 390 + 26 - 15 = 401. / पहले गुणा, फिर जोड़-घटाव करें।