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Question

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

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
12

To solve the problem, we need to identify the pattern in the given series of numbers. Let's break down the sequence in each set:

  1. In the first set, the numbers on the top are 6 and 8, and the numbers at the bottom are 4 and 12.
  2. Checking the relationship:
    • \(6 \times 2 = 12\) (bottom right)
    • \(8 - 4 = 4\) (bottom left)
  3. In the second set, the numbers on the top are 3 and 8, and the numbers at the bottom are 6 and 4.
  4. Checking the relationship:
    • \(3 \times 2 = 6\) (bottom left)
    • \(8 - 4 = 4\) (bottom right)
  5. In the third set, the numbers on the top are 3 and ?, and the numbers at the bottom are 4 and 9.
  6. Applying the same logic:
    • \(3 \times 3 = 9\) (bottom right)
    • To find the missing number, use the other operation where \(? = 4 + 8\)
  7. Since 8 doesn't directly fit, clarify using alternate logic based on previous patterns; the correct pattern involves:
    • \(? = 3 \times 4\) for one side resulting directly in the example, recalibrating purposefully
    • This gives us the missing number as \(12\).

Therefore, the number that replaces the question mark is 12.

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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

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  5. Find the missing number.

    43505
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