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Question

The sum of the four consecutive even numbers is 484. What would the smallest number be?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
118

This problem requires finding the smallest of four consecutive even numbers whose sum is 484.

Numbers Representation

Let the smallest even number be represented by the variable $x$. Since the numbers are consecutive even numbers, they increase by 2 each time. Therefore, the four consecutive even numbers can be represented as:

  • First number: \( x \)
  • Second number: \( x + 2 \)
  • Third number: \( x + 4 \)
  • Fourth number: \( x + 6 \)

Sum Equation Formulation

The problem states that the sum of these four numbers is 484. We can set up an equation:

\( x + (x + 2) + (x + 4) + (x + 6) = 484 \)

Solving for Smallest Number

Now, simplify and solve the equation for $x$:

  1. Combine like terms: \( (x + x + x + x) + (2 + 4 + 6) = 484 \)
  2. This simplifies to: \( 4x + 12 = 484 \)
  3. Subtract 12 from both sides of the equation: \( 4x = 484 - 12 \)
  4. \( 4x = 472 \)
  5. Divide both sides by 4 to find the value of \( x \): \( x = \frac{472}{4} \)
  6. \( x = 118 \)

The variable $x$ represents the smallest of the four consecutive even numbers.

Smallest Number Identified

The value calculated for \( x \) is 118. This is the smallest number among the four consecutive even numbers.

The four numbers are 118, 120, 122, and 124. Their sum is \( 118 + 120 + 122 + 124 = 484 \), confirming the result.

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