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12 Oct 2005, 18:35
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I generally do over-analysis during DS, obviously spending alot of time in the process. Can you guys answer these question (GMAT perspective) so that I can treat them as thumbb rules:
- Does GMAT considers "Negative" divisors or factors. In other words, if question does not specifically says "positive integral divisors", should we consider "negative divisors"? Same question about greatest common divisor (GCD).
- Is 1 and n co-prime where n > 1 and is whole number. What is GCD(1,n)?
- What is GCD(-10, -8)?
- Can quadratic equation ever have "non-real" roots. For example in incorrect answer option.
- If question talks about fraction x/y, can we assume y 0?
Please add similar rules or GMAT boundaries to help others.
Thanks,
-
- Does GMAT considers "Negative" divisors or factors. In other words, if question does not specifically says "positive integral divisors", should we consider "negative divisors"? Same question about greatest common divisor (GCD).
- Is 1 and n co-prime where n > 1 and is whole number. What is GCD(1,n)?
- What is GCD(-10, -8)?
- Can quadratic equation ever have "non-real" roots. For example in incorrect answer option.
- If question talks about fraction x/y, can we assume y 0?
Please add similar rules or GMAT boundaries to help others.
Thanks,
-
Archived Topic
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12 Oct 2005, 20:27
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Good questions. Here is my take on it (my 2 cents) ...
- Does GMAT considers "Negative" divisors or factors. In other words, if question does not specifically says "positive integral divisors", should we consider "negative divisors"? Same question about greatest common divisor (GCD).
>> We cannot have negative integers as divisors or factors. Say for 5, the divisors are 1 & 5 (not -1 or -5)
- Is 1 and n co-prime where n > 1 and is whole number. What is GCD(1,n)?
>> Could you please explain more? I didn't get the co-prime part.
- What is GCD(-10, -8)?
>> I doubt whether we could get a GCD for negative numbers. In that case, should we treat it as positive and take that one?
- Can quadratic equation ever have "non-real" roots. For example in incorrect answer option.
>> In GMAT all numbers are real. No imaginary numbers. I read this in some 'Directions' section.
- If question talks about fraction x/y, can we assume y <> 0?
>> I guess this was also in the Directions section. Divisible by zero is undefined and need not take that into account.
- Does GMAT considers "Negative" divisors or factors. In other words, if question does not specifically says "positive integral divisors", should we consider "negative divisors"? Same question about greatest common divisor (GCD).
>> We cannot have negative integers as divisors or factors. Say for 5, the divisors are 1 & 5 (not -1 or -5)
- Is 1 and n co-prime where n > 1 and is whole number. What is GCD(1,n)?
>> Could you please explain more? I didn't get the co-prime part.
- What is GCD(-10, -8)?
>> I doubt whether we could get a GCD for negative numbers. In that case, should we treat it as positive and take that one?
- Can quadratic equation ever have "non-real" roots. For example in incorrect answer option.
>> In GMAT all numbers are real. No imaginary numbers. I read this in some 'Directions' section.
- If question talks about fraction x/y, can we assume y <> 0?
>> I guess this was also in the Directions section. Divisible by zero is undefined and need not take that into account.
12 Oct 2005, 21:35
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Thanks Sudhagar.
by "co-prime", i meant "relatively prime"
for example: 4 & 5 are relatively prime as gcd(4,5) = 1
Anyone else with their wisdom bucket?
by "co-prime", i meant "relatively prime"
for example: 4 & 5 are relatively prime as gcd(4,5) = 1
Anyone else with their wisdom bucket?
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!
