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Question

Select the correct option that will fill in the blank and complete the series.

18, 36, 108, 432, 2160, .............

This question was previously asked in
SSC GD 2018 Question Paper Hindi (09-Mar-2019) (Shift 1)
The correct answer is

12960

Understanding the Number Series

The question asks to identify the pattern in the given number sequence and find the next term. The sequence provided is: 18, 36, 108, 432, 2160, .....

Identifying the Pattern

Let's analyze the relationship between consecutive terms in the series:

  • From 18 to 36: Multiply by 2. ($18 \times 2 = 36$)
  • From 36 to 108: Multiply by 3. ($36 \times 3 = 108$)
  • From 108 to 432: Multiply by 4. ($108 \times 4 = 432$)
  • From 432 to 2160: Multiply by 5. ($432 \times 5 = 2160$)

The pattern observed is that each term is obtained by multiplying the previous term by an integer that increases sequentially (2, 3, 4, 5, ...).

Calculating the Next Term

Following the identified pattern, the next multiplier should be 6.

Therefore, the next term in the series is calculated as:

$2160 \times 6 = 12960$

Conclusion

The missing term in the series is 12960. This corresponds to Option B.

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Important Questions from Series

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    (D) When the class size gets smaller with each successive term

    Choose the most appropriate answer from the options given below :

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