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Question

Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding to/subtracting from/multiplying with 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

(45, 80, 5)
(39, 30, 24)

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
(45, 72, 9)

Identifying the Number Pattern

We need to find the relationship between the numbers in the given sets: (45, 80, 5) and (39, 30, 24). The operations must be performed on the whole numbers without breaking them into digits.

Let the numbers in a set be represented as (A, B, C).

Let's analyze the first set (45, 80, 5):

  • Consider the difference between the first and third numbers: $ 45 - 5 = 40 $.
  • Now, check if this difference relates to the second number (80). We find that $ 40 \times 2 = 80 $.

Let's verify this pattern with the second set (39, 30, 24):

  • Difference between the first and third numbers: $ 39 - 24 = 15 $.
  • Check the relation to the second number (30): $ 15 \times 2 = 30 $.

The identified pattern is consistent for both sets: (First Number - Third Number) $\times$ 2 = Second Number. Mathematically, this can be expressed as $ (A - C) \times 2 = B $.

Verifying Number Set Options

Now, we apply the derived pattern $ (A - C) \times 2 = B $ to each of the given options:

  • Option 1: (45, 72, 9)
    Calculation: $ (45 - 9) \times 2 = 36 \times 2 = 72 $. This matches the second number (72). This set follows the pattern.
  • Option 2: (15, 10, 11)
    Calculation: $ (15 - 11) \times 2 = 4 \times 2 = 8 $. This does not match the second number (10).
  • Option 3: (27, 6, 25)
    Calculation: $ (27 - 25) \times 2 = 2 \times 2 = 4 $. This does not match the second number (6).
  • Option 4: (15, 0, 16)
    Calculation: $ (15 - 16) \times 2 = (-1) \times 2 = -2 $. This does not match the second number (0).

The set (45, 72, 9) correctly follows the identified numerical relationship, making it the correct answer.

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Similar Questions

  1. Select the set in which the numbers are related in the same way as are the numbers of the following sets.
    (Note: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g., 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
    (52, 100, 196)
    (65, 126, 248)
  2. In the following number-pairs, the second number is obtained by applying certain mathematical operation(s) to the first number. Select the number-pair in which the numbers are related in the same way as are the numbers of the following pairs.
    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding to/subtracting from/multiplying with 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
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  3. Select the option that is related to the third term in the same way as the second term is related to the first term. 

    Bihu : Assam :: Kathakali : ?

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

     Goldsmith : Gold :: Blacksmith : ?

  5. In the following number-pairs, the second number is obtained by applying certain mathematical operation(s) to the first number. Select the number-pair in which the numbers are related in the same way as are the numbers of the following pairs.
    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding to/subtracting from/multiplying with 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
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  6. Select the pair that follows the same pattern as that followed by the two pairs given below. Both pairs follow the same pattern.

    EYN : FAQ
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  7. Select the set in which the numbers are related in the same way as are the numbers of the following sets.
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  8. Select from the options the first word is related to the second word in the same way. The word related to the third word is S
    Jaggery : Sugar :: Pepper : ?
  9. Select the option that is related to the third term in the same way as the second term is related to the first term.
    Tea : Leaves :: Coffee : ?
  10. Select the option in which the words share the same relationship as that shared by the given pair of words.
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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.

    16 : 144 :: 28 : ?

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

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding / subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

    (42, 18, 3)

    (36, 14, 4)

  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.

    ABILITY : LIBAYTI : : CHRONIC : ORHCCIN : : HEAVILY : ?

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

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits.)

    (4, 50, 6)

    (13, 128, 3)

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