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Question

Study the given pattern carefully and select the number from among the given options that can replace the question mark (?).
 

 

196 
58
62
23
5?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
3

Number Sequence Pattern

We analyze the sequence: 196, 586, 223, 5?

Pattern Analysis

The goal is to find the pattern governing the sequence. Let's examine the relationship, particularly the transition between the third and fourth terms.

The number preceding the question mark is 223. The options suggest the final number is 53 (Option C implies the digit is 3).

Let the digits of the number 223 be $d_1=2$, $d_2=2$, $d_3=3$.

Let the digits of the potential next number, 53, be $d'_1=5$, $d'_2=3$.

Rule Identification

A specific pattern connecting 223 to 53 can be identified:

  • The first digit of the next number ($d'_1$) is the sum of the first ($d_1$) and the third ($d_3$) digits of the current number: $d'_1 = d_1 + d_3$.
  • The second digit of the next number ($d'_2$) is the third digit ($d_3$) of the current number: $d'_2 = d_3$.

Applying the Rule

Using the number 223:

  • Calculate the first digit of the result: $d'_1 = 2 + 3 = 5$.
  • Determine the second digit of the result: $d'_2 = 3$.

Combining these digits forms the number 53.

Conclusion

The pattern indicates that the number following 223 is 53. Therefore, the question mark (?) must be replaced by the digit 3.

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Important Questions from Missing Number in Diagram

  1. Choose the correct alternative to replace the question mark (?).

    42 → 26

    71 → 78

    33 → 16

    62 → ?

  2. Study the given pattern carefully and select the number that can replace the question mark (?) in it:

    13 108
     11 
    26 55
     9 
    ? 157
     14 
  3. In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.

    3

    11

    5

    45

    2

    4

    6

    44

    3

    7

    8

    ?

  4. In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives

    11

    2

    4

    98

    3

    6

    5

    100

    8

    9

    1

    ?

  5. Find the missing number.

    43505
    76?8
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