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08 Oct 2018, 02:09
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Good morning! I worry sometimes that semantics could confuse me and that I might get wrong questions just due to not understanding the question.
For instance:
What is the sum of the prime factors of 18? Is the answer 5 or 8?
What is the sum of the unique prime factors of 18? This doesn't leave room for ambiguity so I know answer is 5.
What is the sum of all solutions of: x^2+6x+9=|x+3|? This gives you two equations one with -3,-2 as roots and one with -3,-4 as roots. Given it says "all solutions", couldn't one argue that you need to add up all 4 numbers? I think for this one I agree that the "solutions" of that equation are -3,-4,-2 so hence answer is -9... but that "all" confuses me a bit.
Is there any GMAT standard that ensures there's never ambiguity?
Thank you!
For instance:
What is the sum of the prime factors of 18? Is the answer 5 or 8?
What is the sum of the unique prime factors of 18? This doesn't leave room for ambiguity so I know answer is 5.
What is the sum of all solutions of: x^2+6x+9=|x+3|? This gives you two equations one with -3,-2 as roots and one with -3,-4 as roots. Given it says "all solutions", couldn't one argue that you need to add up all 4 numbers? I think for this one I agree that the "solutions" of that equation are -3,-4,-2 so hence answer is -9... but that "all" confuses me a bit.
Is there any GMAT standard that ensures there's never ambiguity?
Thank you!
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19 Oct 2018, 05:32
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gmat800live
GMAT Doesn't leave any ambiguity n interpretation of questions
So it will always mention sum of all distinct prime factors when it expects the answer 5 and will always mentioned "sum of all prime factors distinct or similar" if it expects answer 8
x^2+6x+9=|x+3|
In this question, there is No ambiguity even in current state of language.
-3,-2 as roots and one with -3,-4 but if considered 'all roots' will means all possible values of x that satisfy the given equation then we only get, -2, -3 and -4
I hope this helps...
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
