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12 Jul 2019, 05:51
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Hi everyone,
Apologies if I'm posting this on the wrong board. I went into the quantitative subforum and that appears to be strictly for posting specific problems, so I decided to go with this board instead.
Basically, I'm having trouble with a certain type of question and it occurred frequently enough on my last practice test to concern me. Although I'm generally getting 600+ questions right on all other quant sections this one type consistently trips me up even at a sub-600 difficulty level.
The type of question I'm talking about are those ones that ask how many primes less than 100 are factors of X, or how many primes less than 100, or how many positive integers less than 100 are multiples of prime numbers, or the probability of a prime number less than 100 being Y. I've ascertained that these are number properties questions, but none of the number properties tutorials I've found have adequate info to solve them quickly. Although I can usually solve them EVENTUALLY, it always takes a lot longer than 2 minutes, so I need a way to speed them up. Is there any alternative to simply memorizing all the primes under 100?
Apologies if I'm posting this on the wrong board. I went into the quantitative subforum and that appears to be strictly for posting specific problems, so I decided to go with this board instead.
Basically, I'm having trouble with a certain type of question and it occurred frequently enough on my last practice test to concern me. Although I'm generally getting 600+ questions right on all other quant sections this one type consistently trips me up even at a sub-600 difficulty level.
The type of question I'm talking about are those ones that ask how many primes less than 100 are factors of X, or how many primes less than 100, or how many positive integers less than 100 are multiples of prime numbers, or the probability of a prime number less than 100 being Y. I've ascertained that these are number properties questions, but none of the number properties tutorials I've found have adequate info to solve them quickly. Although I can usually solve them EVENTUALLY, it always takes a lot longer than 2 minutes, so I need a way to speed them up. Is there any alternative to simply memorizing all the primes under 100?
12 Jul 2019, 10:19
Kudos
Bookmarks
Hi AlpaBeta1988,
I’m glad you reached out, and I’m happy to help. Regarding the types of questions with which you are struggling, can you provide some specific examples of questions of the type that you are talking about?
Also, do you need any general advice on how to improve your quant skills? What is your GMAT score goal?
I’m glad you reached out, and I’m happy to help. Regarding the types of questions with which you are struggling, can you provide some specific examples of questions of the type that you are talking about?
Also, do you need any general advice on how to improve your quant skills? What is your GMAT score goal?
13 Jul 2019, 18:24
Kudos
Bookmarks
Hi AlphaBeta1988,
To start, it's important to remember that NOTHING about a GMAT question is ever 'random' - every word is carefully chosen, specific concepts are woven into each prompt and even the 5 answers choices can have patterns behind them. Thus, if you have specific Quant questions that are giving you trouble, then you should post them (or "Google" them and read through the explanations. If you don't have anything to specifically reference, then we can still talk in general terms.
You are correct that when you see that type of question, there will likely be a Number Property pattern (and sometimes more than one) behind the specific question that is asked. Understanding rules of division and patterns behind multiples of a given number can often be helpful (but even if you don't have all of those concepts memorized, you can often figure them out with some basic Arithmetic AS you work through the question. It's also worth noting that your goal when dealing with any individual question is NOT to be 'fast' - it's to be "efficient" (and sometimes the most efficient way to approach a question will still require 3 minutes worth of work).
Since these types of questions are relatively rare, it's also possible that you do not have to correctly answer any of them to hit your Score Goal - so your study time might be better spent on other subjects. Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs/mocks (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich
To start, it's important to remember that NOTHING about a GMAT question is ever 'random' - every word is carefully chosen, specific concepts are woven into each prompt and even the 5 answers choices can have patterns behind them. Thus, if you have specific Quant questions that are giving you trouble, then you should post them (or "Google" them and read through the explanations. If you don't have anything to specifically reference, then we can still talk in general terms.
You are correct that when you see that type of question, there will likely be a Number Property pattern (and sometimes more than one) behind the specific question that is asked. Understanding rules of division and patterns behind multiples of a given number can often be helpful (but even if you don't have all of those concepts memorized, you can often figure them out with some basic Arithmetic AS you work through the question. It's also worth noting that your goal when dealing with any individual question is NOT to be 'fast' - it's to be "efficient" (and sometimes the most efficient way to approach a question will still require 3 minutes worth of work).
Since these types of questions are relatively rare, it's also possible that you do not have to correctly answer any of them to hit your Score Goal - so your study time might be better spent on other subjects. Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs/mocks (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich
