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

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

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3. Number Series / संख्या श्रृंखला Test 19

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
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3. Number Series / संख्या श्रृंखला | 25 questions

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Preview all 25 questions in 3. Number Series / संख्या श्रृंखला Test 19 (no login required)
  1. 3. Number Series / संख्या श्रृंखला — Number Series

    1. Which is the wrong term? 3, 5, 9, 17, 33, 65, 131 / गलत पद: 3, 5, 9, 17, 33, 65, 131

    • A. 65
    • B. 131 (Correct)
    • C. 33
    • D. 17

    Explanation: ×2−1: 65×2−1=129≠131. Wrong=131. / 129 होना चाहिए।

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

    2. Find the next term: 9, 16, 25, 36, 49, 64, ? / अगला पद: 9, 16, 25, 36, 49, 64, ?

    • A. 72
    • B. 81 (Correct)
    • C. 84
    • D. 90

    Explanation: n² starting from 3: 9²? No, 3²,4²,...,8²=64, 9²=81. / 9²=81।

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

    3. Find the next term: 11, 22, 33, 44, 55, ? / अगला पद: 11, 22, 33, 44, 55, ?

    • A. 60
    • B. 66 (Correct)
    • C. 70
    • D. 72

    Explanation: Multiples of 11: 6×11=66. / 6×11=66।

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

    4. Find the next term: 50, 48, 44, 38, 30, ? / अगला पद: 50, 48, 44, 38, 30, ?

    • A. 18
    • B. 20 (Correct)
    • C. 22
    • D. 24

    Explanation: Diff: −2,−4,−6,−8,−10. 30−10=20. / 30−10=20।

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

    5. Find the next term: 1, 3, 9, 27, 81, 243, ? / अगला पद: 1, 3, 9, 27, 81, 243, ?

    • A. 486
    • B. 607
    • C. 729 (Correct)
    • D. 810

    Explanation: GP r=3. 243×3=729. / 243×3=729।

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

    6. Find the next term: 2, 8, 18, 32, 50, ? / अगला पद: 2, 8, 18, 32, 50, ?

    • A. 60
    • B. 68
    • C. 72 (Correct)
    • D. 76

    Explanation: 2n²: 2×36=72. / 2n²: 72।

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

    7. Find the next term: 7, 9, 12, 16, 21, 27, ? / अगला पद: 7, 9, 12, 16, 21, 27, ?

    • A. 30
    • B. 33
    • C. 34 (Correct)
    • D. 36

    Explanation: Diff: 2,3,4,5,6,7. 27+7=34. / 27+7=34।

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

    8. Find the next: 5, 11, 23, 47, 95, ? / अगला पद: 5, 11, 23, 47, 95, ?

    • A. 181
    • B. 183
    • C. 191 (Correct)
    • D. 193

    Explanation: ×2+1: 95×2+1=191. / ×2+1=191।

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

    9. Find the next: 3, 7, 16, 35, 74, ? / अगला पद: 3, 7, 16, 35, 74, ?

    • A. 148
    • B. 153 (Correct)
    • C. 155
    • D. 157

    Explanation: ×2+1,×2+2,×2+3,...: 74×2+5=153. / 74×2+5=153।

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

    10. Find the next term: 40, 37, 33, 28, 22, ? / अगला पद: 40, 37, 33, 28, 22, ?

    • A. 13
    • B. 14
    • C. 15 (Correct)
    • D. 16

    Explanation: Diff: −3,−4,−5,−6,−7. 22−7=15. / 22−7=15।

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

    11. Find the next term: 1, 2, 3, 5, 8, 13, ? / अगला पद: 1, 2, 3, 5, 8, 13, ?

    • A. 18
    • B. 20
    • C. 21 (Correct)
    • D. 22

    Explanation: Fibonacci: 8+13=21. / 8+13=21।

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

    12. What is the sum of first 10 terms of GP 1, 2, 4, 8, ...? / GP 1, 2, 4, 8, ... के प्रथम 10 पदों का योग ज्ञात कीजिए।

    • A. 511
    • B. 1022
    • C. 1023 (Correct)
    • D. 2046

    Explanation: S=1×(2¹⁰−1)/(2−1)=1023. / S=1023।

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

    13. Find the next term: 6, 9, 14, 21, 30, 41, ? / अगला पद: 6, 9, 14, 21, 30, 41, ?

    • A. 50
    • B. 52
    • C. 54 (Correct)
    • D. 56

    Explanation: Diff: 3,5,7,9,11,13. 41+13=54. / 41+13=54।

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

    14. Find the next term: 120, 60, 30, 15, ? / अगला पद: 120, 60, 30, 15, ?

    • A. 5
    • B. 7.5 (Correct)
    • C. 8
    • D. 10

    Explanation: GP r=0.5. 15÷2=7.5. / ÷2=7.5।

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

    15. Find the next term: 2, 3, 5, 7, 11, 13, 17, 19, ? / अगला पद: 2, 3, 5, 7, 11, 13, 17, 19, ?

    • A. 20
    • B. 21
    • C. 23 (Correct)
    • D. 25

    Explanation: Prime numbers series. 23 is next prime. / अगली अभाज्य संख्या=23।

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

    16. The sum of first n terms of a series is n(n+2). Find the 5th term. / एक श्रृंखला के n पदों का योग n(n+2) है। 5वाँ पद ज्ञात कीजिए।

    • A. 6
    • B. 7 (Correct)
    • C. 8
    • D. 9

    Explanation: T₅=S₅−S₄=5×7−4×6=35−24=11. Recheck: T_n=S_n−S_{n−1}=n(n+2)−(n−1)(n+1)=n²+2n−n²+1=2n+1. T₅=11. / T₅=2×5+1=11।

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

    17. Find the next term: 1, 7, 19, 37, 61, ? / अगला पद: 1, 7, 19, 37, 61, ?

    • A. 87
    • B. 89
    • C. 91 (Correct)
    • D. 93

    Explanation: Diff: 6,12,18,24,30. 61+30=91. / 61+30=91।

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

    18. Find the next term: 10, 12, 16, 22, 30, 40, ? / अगला पद: 10, 12, 16, 22, 30, 40, ?

    • A. 48
    • B. 50
    • C. 52 (Correct)
    • D. 54

    Explanation: Diff: 2,4,6,8,10,12. 40+12=52. / 40+12=52।

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

    19. Find the next term: 0, 6, 24, 60, 120, ? / अगला पद: 0, 6, 24, 60, 120, ?

    • A. 180
    • B. 200
    • C. 210 (Correct)
    • D. 220

    Explanation: n(n+1)(n−1)? Or n³−n: 1−1=0,8−2=6,27−3=24,64−4=60,125−5=120,216−6=210. / n³−n=210।

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

    20. Find the next term: 4, 6, 10, 16, 24, 34, ? / अगला पद: 4, 6, 10, 16, 24, 34, ?

    • A. 44
    • B. 46 (Correct)
    • C. 48
    • D. 50

    Explanation: Diff: 2,4,6,8,10,12. 34+12=46. / 34+12=46।

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

    21. 15% of 825 is: / 825 का 15% कितना है?

    • A. 113.75
    • B. 123.75 (Correct)
    • C. 133.75
    • D. 143.75

    Explanation: 15% = 15/100, so answer = 123.75. / 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 900 is sold at 15% profit. Find SP. / Rs 900 में खरीदी वस्तु 15% लाभ पर बेची गई। SP ज्ञात करें।

    • A. Rs 995
    • B. Rs 1035 (Correct)
    • C. Rs 1075
    • D. Rs 1115

    Explanation: SP = CP x (100 + profit%)/100 = 900 x 115/100 = Rs 1035. / लाभ प्रतिशत जोड़कर विक्रय मूल्य निकालें।

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

    23. A finishes a work in 21 days and B in 27 days. Together they finish in: / A 21 दिन और B 27 दिन में काम पूरा करते हैं। साथ में समय?

    • A. 10.8 days
    • B. 11.8 days (Correct)
    • C. 12.8 days
    • D. 13.8 days

    Explanation: Combined time = ab/(a+b) = 21 x 27 / 48 = 11.8 days. / संयुक्त कार्य में दरें जोड़ी जाती हैं।

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

    24. 54 km/h equals: / 54 किमी/घंटा बराबर है:

    • A. 12 m/s
    • B. 15 m/s (Correct)
    • C. 18 m/s
    • D. 20 m/s

    Explanation: km/h to m/s conversion uses x 5/18. 54 x 5/18 = 15. / किमी/घंटा को मी/से में बदलने के लिए 5/18 से गुणा करें।

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

    25. Simplify: 25 x 18 + 25 - 18. / सरल करें: 25 x 18 + 25 - 18.

    • A. 449
    • B. 457 (Correct)
    • C. 465
    • D. 473

    Explanation: Apply BODMAS: 450 + 25 - 18 = 457. / पहले गुणा, फिर जोड़-घटाव करें।