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Home Verbal Reasoning Number Series See What Others Are Saying!
  • Question
  • 2 , 9 , 5 , 36 , 125 , 648 , 3861


  • Options
  • A. 12
  • B. 11
  • C. 75
  • D. 72

  • Correct Answer
  •  

    Explanation

    As per the details in the question the series is in the form of
    First term = 2
    Second term = First term × 1 + 7
    ? Second term = 2 × 1 + 7 = 2 + 7 = 9 ;
    Third term = Second term × 2 - 11
    ? Third term = 9 × 2 - 11 = 18 - 11 = 5; 5 is wrong. It should be 7 as Third term .
    Similarly , we can find all others terms also.
    Fourth term = Third term × 3 + 15
    ? Fourth term = 7 × 3 + 15 = 21 + 15 = 36 ;
    Fifth term = Fourth term × 4 - 19
    ? Fifth term = 36 × 4 - 19 = 144 -19 = 125 ;
    Sixth term = Fifth term × 5 + 23
    ? Sixth term = 125 × 5 + 23 = 625 + 23 = 648 ;
    Seventh term = Sixth term × 6 - 27
    ? Seventh term = 648 × 6 - 27 = 3888 - 27 = 3861 .
    New series is
    First term = 5 × 1 + 7 = 12;
    Second term = 12 × 2 - 11 = 13.
    Hence Second term of new series is 13 and correct option is ( E ) .


  • More questions

    • 1. Pointing the lady in the photograph, Seema said, "Her son's father is the soninlaw of my mother". How is Seema related to the lady?

    • Options
    • A. Sister
    • B. Mother
    • C. Cousin
    • D. Aunt
    • Discuss
    • 2. In the following question, select the missing number from the given series. 6, 9 , 15, 24, 39, 63, ?

    • Options
    • A. 97
    • B. 102
    • C. 115
    • D. 127
    • Discuss
    • 3. Sandeep has a brother named Ankur. Sandeep is the son of Kishan. Baljor is Kishan's father. How is Ankur related to Baljor?

    • Options
    • A. Grandson
    • B. Brother
    • C. Son
    • D. Grandfather
    • Discuss
    • 4. Preeti is the daughter of Rajesh and Amit is the son of Ankita. Rajesh is the only son of Rajan. Ankita is the daughter-in-law of Rajan. How is Preeti related to Amit ?

    • Options
    • A. Sister
    • B. Mother
    • C. Cousin
    • D. Aunt
    • Discuss
    • 5. Which number will complete the series? 63, 72, 81, 90, ____, 108

    • Options
    • A. 80
    • B. 99
    • C. 100
    • D. 117
    • Discuss
    • 6. Introducing a girl, Ankit says, "She is the sister of the son of my mother's sister". How is the girl related to Ankit?

    • Options
    • A. Niece
    • B. Daughter
    • C. Sister
    • D. Cousin
    • Discuss
    • 7. Jatin,Kamal and Navin are the 3 mountaineers.Jatin is kamals brother.Kamal is navinsbrother .Navin is not Jatin's brother.Therefore,Navin is jatin's brother

    • Options
    • A. True
    • B. Probably false
    • C. False
    • D. Can't say
    • Discuss
    • 8. A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 9 , 21, 45, 93, ? , 381

    • Options
    • A. 189
    • B. 198
    • C. 188
    • D. 112
    • Discuss
    • 9. Introducing a man to her husband, a woman said, This brother's father is the only son of my grandfather." How is the woman related to his man ?

    • Options
    • A. Mother
    • B. Aunt
    • C. Sister
    • D. Daughter
    • Discuss
    • 10. In the following question, select the missing number from the given series. 1357, 3085, 5282, 8026, ?

    • Options
    • A. 9961
    • B. 10441
    • C. 11321
    • D. 11401
    • Discuss


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