Numbers from HCF and ratio: The HCF of three numbers is 23. If they are in the ratio 1 : 2 : 3, find the actual numbers.

Difficulty: Easy

Correct Answer: 23, 46, 69

Explanation:


Introduction / Context:
When numbers are in a given ratio and share a known HCF, each number can be expressed as HCF times the respective ratio part (provided the ratio parts are coprime in aggregate). This is a standard reconstruction technique in HCF–ratio problems.


Given Data / Assumptions:

  • HCF = 23
  • Ratio = 1 : 2 : 3


Concept / Approach:
Let the numbers be 23x, 23y, 23z with x : y : z = 1 : 2 : 3. Because the common factor extracted is the HCF, the simplest choice is x = 1, y = 2, z = 3 to obtain the minimal triple satisfying the ratio and HCF conditions.


Step-by-Step Solution:

Number 1 = 23 * 1 = 23.Number 2 = 23 * 2 = 46.Number 3 = 23 * 3 = 69.


Verification / Alternative check:

HCF(23, 46, 69) = 23, and 23 : 46 : 69 reduces to 1 : 2 : 3 as required.


Why Other Options Are Wrong:

  • All other triplets either do not have HCF equal to 23 or do not preserve the exact 1 : 2 : 3 ratio.


Common Pitfalls:

  • Multiplying the ratio parts by another common factor, which would increase the HCF beyond 23.


Final Answer:

23, 46, 69

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