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Question

The product of two positive numbers is 1445. If the first number is five times of the second number, then the sum of the two numbers is:

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
102

Problem Setup: Product and Relationship of Two Numbers

Let the two positive numbers be represented by variables.

  • Let the second number be $x$.
  • Since the first number is five times the second number, the first number is $5x$.

Calculating the Numbers Using the Product

The problem states that the product of the two numbers is 1445.

  • Equation: $(5x) \times x = 1445$
  • Simplify: $5x^2 = 1445$
  • Solve for $x^2$: $x^2 = \frac{1445}{5}$
  • Calculate $x^2$: $x^2 = 289$
  • Solve for $x$: $x = \sqrt{289}$
  • Result for $x$: $x = 17$ (We take the positive root as the numbers are positive).

Now, find the values of the two numbers:

  • Second number ($x$) = 17
  • First number ($5x$) = $5 \times 17 = 85$

Determining the Sum of the Two Numbers

The question asks for the sum of these two numbers.

  • Sum = First number + Second number
  • Sum = $85 + 17$
  • Sum = $102$

Therefore, the sum of the two numbers is 102.

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Important Questions from Algebric Equations

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