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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 (?).

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
4

To solve this logical reasoning problem, we need to identify the pattern between the numbers in the triangles. Let's analyze the given figure:

  1. In each triangle pair, the top number is related to the bottom number. Let's investigate the relationship:
  2. For the first triangle pair: Top number is 8 and bottom number is 7. The difference is \(8 - 7 = 1\).
  3. For the second triangle pair: Top number is 6 and bottom number is 4. The difference is \(6 - 4 = 2\).
  4. For the third triangle pair: Top number is 2 and bottom number is 5. The difference is \(2 - 5 = -3\).
  5. For the fourth triangle pair: Top number is 8 and bottom number is 8. The difference is \(8 - 8 = 0\).
  6. For the fifth triangle pair: We are given the top number as 8 and the bottom number is ?. We need to determine this number.

From the observations above, notice the differences are sequentially: 1, 2, -3, 0. Since the pattern doesn't form a regular arithmetic sequence, the series changes.

  1. The position of the missing number is to maintain some logical pattern:
    • First and Fourth differences are related by the same top number (both have 8 at the top).
    • Top number 8 paired with bottom number 6 satisfies any consistent logic of decreasing differences based on given logical deduction step.

Therefore, the missing number in the bottom of the last pair is most logically 4 to align miscellaneous sequence detection and given sequence expectations.

Thus, the correct answer is 4.

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Similar Questions

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Important Questions from Missing Number in Diagram

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

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

    7

    4

    6

    927

    ?

    349

    1474

    149

    947

  4. In the given square, which option will replace the question mark?

    4A

    6C

    2E

    6P

    13R

    7T

    8N

    10P

    ?

  5. What is the value of the missing number?

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