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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 PDF (31-Jan-2021) (Shift 1)
The correct answer is
25

To find the number that replaces the question mark (?), examine the relationships in the pattern. The pattern given in the image suggests a logical relationship between the numbers that involves squaring and specific positions in each arm of the pattern.

Let's analyze each arm:

  1. First Arm: The numbers are 9 and 4. Notice \(9 = 3^2\) and \(4 = 2^2\). The difference between the squares of 3 and 2 is 5.
  2. Second Arm: The numbers are 5 and 9. Here, \(9 = 3^2\) and \(5\) remains unchanged. The difference in this case does not directly provide an operation but suggests it's part of the overall structure.
  3. Third Arm: The numbers are 3 and 16. Note \(16 = 4^2\) and \(3\) again remains unchanged, showing it's part of the circle's structure where 4 is just a suggested outcome (confirmed by outer pattern).

The crucial understanding is the difference between squared numbers and their direct positioning in the arranged circle. Using the logic of squared proximity:

For the missing number:\((? = 5^2\\) which equals \(25\).

This completion aligns with missing number logic through squared differences in the presented arms of a circle graphically.

Thus, the number replacing the question mark is 25, matching the provided options and completing logical arrangement.

Therefore, the correct answer is 25.

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Important Questions from Missing Number

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