Can You Solve This Engineering Brain Teaser?

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Discussion Overview

The discussion revolves around a brain teaser from an engineering exam, focusing on a problem involving linear equations and outputs based on given inputs. Participants are attempting to solve the problem and clarify the details surrounding it.

Discussion Character

  • Homework-related, Exploratory, Technical explanation

Main Points Raised

  • One participant expresses a lack of understanding of the problem and seeks help from others.
  • Another participant mentions a potential issue with visibility of the answer due to forum settings.
  • A different participant shares calculations related to differences between numbers, suggesting a numerical approach to the problem.
  • One participant proposes that the problem involves two-dimensional linear equations and suggests a possible typo in the original question.
  • This same participant provides a specific linear equation based on their interpretation of the inputs and outputs, concluding that the answer is E based on their calculations.

Areas of Agreement / Disagreement

There is no consensus on the correct interpretation of the problem or the solution. Multiple interpretations and approaches are presented, indicating ongoing uncertainty and exploration.

Contextual Notes

Participants note potential issues with the visibility of the question and the possibility of a typo in the problem statement, which may affect their understanding and solutions.

Tom McCurdy
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I was looking through some old exams for my engineering class and uncovered the following question...

If you would like to know the answer please scroll down and highlight the text

But I don't have any clue how to get it. If anyone can figure it out that would be great... thx

-tom


















Answer: E
 

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Your answer is showing.


Unfortunately I have never been very good at these sorts of problems so I don't really have anything else to offer.
---edit---
It looks like Greg may have changed the background colour.
 
Sorry it doesn't show on the old forum at least for me... I still have it set up for the old school view...

so far all i got is the difference between
8-13 is 5
13-28 is 15
and 28-8 is 20

working on this idea.
 
I have also found another thing that may help

the problem is 2 dimensional linear equations
 
y can't I see the question? :)
 
If the equation is linear, then in my opinion, there is a typo in the question. Perhaps it should read:

Input A: {1, 0, 1, 1, ...}
Input B: {0, 1, 1, 10, ...}

Output: {8, 13, 28, 208, ... }

If this is the case, the linear equation is f = -7 + 15 * a + 20 * b. Then the inputs a = 10, b = 0 would produce the output f = -7 + 15 * 10 = 143. Since this is not one of the first 4 choices, the answer is E.
 

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