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Question

In each of the following questions, two numbers are given which follow a certain logical or arithmetic relationship. Identify the same pattern and apply it to find the missing number in the second pair. Choose the correct option from the given alternatives.
$32654: 54876 :: 51763:?$

The correct answer is
73986

Understanding the Number Analogy

This question involves a number analogy, where we need to identify a pattern between the first pair of numbers ($32654$ and $54876$) and apply that same pattern to the second pair ($51763$ and the unknown number).

Analyzing the First Pair: $32654 \rightarrow 54876$

Let's look at the digits of the first number ($32654$) and how they relate to the digits of the second number ($54876$).

  • The first digit of $32654$ is $3$, and the first digit of $54876$ is $5$. The difference is $5 - 3 = 2$.
  • The second digit of $32654$ is $2$, and the second digit of $54876$ is $4$. The difference is $4 - 2 = 2$.
  • The third digit of $32654$ is $6$, and the third digit of $54876$ is $8$. The difference is $8 - 6 = 2$.
  • The fourth digit of $32654$ is $5$, and the fourth digit of $54876$ is $7$. The difference is $7 - 5 = 2$.
  • The fifth digit of $32654$ is $4$, and the fifth digit of $54876$ is $6$. The difference is $6 - 4 = 2$.

The pattern identified is that each digit in the number $32654$ is increased by $2$ to get the corresponding digit in $54876$. This can be shown as:

  • $3 + 2 = 5$
  • $2 + 2 = 4$
  • $6 + 2 = 8$
  • $5 + 2 = 7$
  • $4 + 2 = 6$

Combining these results ($5, 4, 8, 7, 6$) gives us $54876$.

Applying the Pattern to the Second Pair: $51763 \rightarrow ?$

We will now apply the same rule (adding $2$ to each digit) to the number $51763$ to find the missing number.

  • First digit: $5 + 2 = 7$
  • Second digit: $1 + 2 = 3$
  • Third digit: $7 + 2 = 9$
  • Fourth digit: $6 + 2 = 8$
  • Fifth digit: $3 + 2 = 5$

Combining these digits ($7, 3, 9, 8, 5$) gives us the number $73985$.

Choosing the Correct Option

Based on the established pattern of adding $2$ to each digit, the missing number is calculated as $73985$. Let's compare this with the given options:

  • Option 1: $73986$
  • Option 2: $74986$
  • Option 3: $72985$
  • Option 4: $73985$

Our calculated result $73985$ corresponds to Option 4. The provided correct answer is Option 1 ($73986$).

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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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