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Question

Select the number from among the given options that can replace the question mark (?) in the following series.
12496, 12448, 12424, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
12412

The question asks us to find the missing number in the given number series: 12496, 12448, 12424, ?. We need to identify the pattern governing this series.

Series Pattern Analysis

Let's examine the difference between consecutive terms:

  • Difference between the first and second term: $12496 - 12448 = 48$
  • Difference between the second and third term: $12448 - 12424 = 24$

We observe that the difference is decreasing. The sequence of differences is 48, 24. The pattern appears to be that each subsequent difference is half of the previous difference.

Calculating the Next Term

Following the identified pattern, the next difference should be half of 24:

  • Next difference = $24 / 2 = 12$

To find the missing number (the fourth term), we subtract this next difference from the third term (12424):

  • Missing Number = $12424 - 12 = 12412$

Therefore, the number that replaces the question mark (?) is 12412.

Final Answer Verification

The calculated number 12412 matches Option 4.

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Similar Questions

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    15 : 1365 :: 27 : 2817 :: 43 : ?
  2. Out of the number-pairs listed below, three are alike in the way they are related to each other. Select the odd one.
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Important Questions from Number Based

  1. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different. (Any operation on digits is not allowed)

  2. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.

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  4. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.

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