Linear Condition — Reduced to One-Third After Subtracting 48 A number becomes one-third of itself when 48 is subtracted from it. What is two-thirds of that original number?

Difficulty: Easy

Correct Answer: None of these

Explanation:


Introduction / Context:
Here you translate a verbal condition into a simple linear equation and then compute a requested fraction of the found number. This checks your comfort with algebraic manipulation and careful reading—especially verifying that the requested final quantity appears among the options.


Given Data / Assumptions:

  • Let the number be N.
  • Subtracting 48 yields one-third of itself: N − 48 = N/3.
  • We must find 2N/3 (two-thirds of N).


Concept / Approach:
Solve the linear equation to get N. Then compute the requested fraction 2N/3. Always compare the derived value to the choices; if it is not listed explicitly, the correct selection is “None of these.”


Step-by-Step Solution:
Start: N − 48 = N/3.Rearrange: N − N/3 = 48 → (2N/3) = 48.Therefore, 2N/3 = 48 immediately.Hence N = (48 * 3)/2 = 72, and two-thirds of N is 48.


Verification / Alternative check:
Check the original statement with N = 72: 72 − 48 = 24 and N/3 = 24, consistent. Thus 2N/3 = 48 is correct.


Why Other Options Are Wrong:
24, 72, and 36 represent N/3, N, or other misread values. Since 48 (the true two-thirds) is not among the listed options, “None of these” is the only correct choice.


Common Pitfalls:
Selecting 72 (the value of N) instead of two-thirds of N; stopping at N without computing the asked quantity; overlooking that the exact computed result is absent from the choices.


Final Answer:
None of these

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