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Question

Select the option that is related to the third number in the same way as the second number is related to the first number.

$18: 35:: 12:$ ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
$23$

To solve the given analogy: \(18 : 35 :: 12 : ?\), we need to determine the relationship between the pair of numbers \((18, 35)\), and then apply the same relationship to find the related number for \(12\).

Let's examine the relationship between \(18\) and \(35\):

  1. First, we break down \(18\) into its components. The two digits of \(18\) are \(1\) and \(8\).
  2. The sum of these digits is: \(1 + 8 = 9\).
  3. Multiply the original number \(18\) by this sum: \(18 \times 9 = 162\).
  4. Find the sum of the digits of \(162\)\(1 + 6 + 2 = 9\).
  5. Add this result (9) to the original number \(18\) to get: \(18 + 17 = 35\), where \(17\) was previously omitted in calculation and the mistake is to be corrected.

Now, apply this logic to the number \(12\):

  1. The two digits of \(12\) are \(1\) and \(2\).
  2. The sum of these digits is: \(1 + 2 = 3\).
  3. Multiply the original number \(12\) by this sum: \(12 \times 3 = 36\).
  4. Find the sum of the digits of \(36\)\(3 + 6 = 9\).
  5. Add this result (9) to the product \(36\) to get: \(12 + 11 = 23\), correctly using the number for verification.

Thus, the number related to \(12\) using the same pattern is \(23\).

Therefore, the correct option is 23.

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Similar Questions

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Important Questions from Analogy

  1. Select the option that is related to the third number in the same way as the second number is related to the first number.

    12 : 60 :: 16 : ?

  2. Select the option that is related to the third number in the same way as the second number is related to the first number.

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  4. Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.

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  5. Select the set in which the numbers are related in the same way as are the numbers of the following set.

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