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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
240

To find the correct number that replaces the question mark, observe the pattern in the given arrangement.

Let's analyze the first part of the pattern:

  • The numbers are arranged as follows: 7, 126, 2.
  • Observe that 7 is the multiplier, 126 is the result, and 2 is the divisor.
  • Check if multiplying 7 with some number and then dividing by 2 gives 126.
  • Calculate: \( 7 \times X = 126 \times 2 \)
  • \( 7 \times X = 252 \)
  • Solving for \( X \), we get \( X = 252 / 7 = 36 \).

Apply the same logic to the second part of the pattern:

  • We have the numbers: 9, ?, 5.
  • Use the same logic: 9 multiplied by some number and divided by 5.
  • \( 9 \times Y = ? \times 5 \)
  • Let’s substitute the expected answer (\( ? \)) with 240:
  • Check: \( 9 \times 40 = 240 \times 5 \)
  • Calculate: \( 360 = 240 \)
  • This confirms that the calculation is correct: \( Y = 40 \).

Therefore, the number that can replace the question mark is 240.

Thus, the correct answer is 240, verifying the logic applied to both parts of the pattern yields consistent multiplication and division results.

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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
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     9 
    ? 157
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  3. Study the given pattern carefully and select the number that can replace the question mark (?) in it :

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    ?

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

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