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22 Jan 2017, 17:26
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Can someone clarify what you are looking for on DS questions that are something like "Is X Even/Prime/Negative.."
If both statements are enough to conclude that X is NOT one of those, do you pick E, or do you pick one of the other choices (for example if A was sufficient enough to determine that X is NOT)
In the OG it seems like all questions of this sort picks E when X is NOT what the question asks.
If both statements are enough to conclude that X is NOT one of those, do you pick E, or do you pick one of the other choices (for example if A was sufficient enough to determine that X is NOT)
In the OG it seems like all questions of this sort picks E when X is NOT what the question asks.
23 Jan 2017, 11:56
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DealMonkey
Can someone clarify what you are looking for on DS questions that are something like "Is X Even/Prime/Negative.."
If both statements are enough to conclude that X is NOT one of those, do you pick E, or do you pick one of the other choices (for example if A was sufficient enough to determine that X is NOT)
In the OG it seems like all questions of this sort picks E when X is NOT what the question asks.
If both statements are enough to conclude that X is NOT one of those, do you pick E, or do you pick one of the other choices (for example if A was sufficient enough to determine that X is NOT)
In the OG it seems like all questions of this sort picks E when X is NOT what the question asks.
Basically in DS there are two types of question :
The value type : What is the value of x ? What is the length of AB ?
For this type of question you need to find one only value to conclude about the sufficiency
The Yes/ NO type, the type you were mentioning in your question : Is X prime ? is Y even ?
For this type of question you just need to answer a definitive YES or a definitive NO the sufficiency will be the ability to have only ONE answer.
As an example, is x prime ?
1) x has three different factors
2) x+y is prime
Statement 1 indicates that x has three different factors, therefore x is not prime.
Hence we have enough information to answer the question, so statement 1 is SUFFICIENT, we answered with a DEFINITIVE NO, there is NO AMBIGUITY.
Statement 2 indicates that x+y is prime, since we have no information about x and about y we can think that :
x = 2 and y = 1 therefore x+y = 3 (prime) and x = 2 prime, YES
x = 4 and y = 1 thetford x+y = 5 (prime) and x = 4, not prime, NO
In this case we have TWO DIFFERENT ANSWERS Yes and NO, so the statement is INSUFFICIENT.
The answer is A, Statement 1 is sufficient.
27 Jan 2017, 22:46
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There are two sort of DS questions:
1. Value based
2. YES/NO type
so if you are asked IS X --- ? then aren't you looking for a definite answer that says either YES/NO.
Any statement would be considered sufficient that says YES or NO.
now here is how you pick an answer:
1. if statemenet-1 is sufficient BUT statemenet-2 is not then answer is "A".
2. if statemenet-2 is sufficient BUT statemenet-1 is not then answer is "B".
3. if both statemenet-1 AND statemenet-2 are individually sufficient then answer is "D".
4. if statemenet-1 & statemenet-2 are TOGETHER sufficient then answer is "C".
5. if statemenet-1 & statemenet-2 are not even TOGETHER sufficient then answer is "E".
1. Value based
2. YES/NO type
so if you are asked IS X --- ? then aren't you looking for a definite answer that says either YES/NO.
Any statement would be considered sufficient that says YES or NO.
now here is how you pick an answer:
1. if statemenet-1 is sufficient BUT statemenet-2 is not then answer is "A".
2. if statemenet-2 is sufficient BUT statemenet-1 is not then answer is "B".
3. if both statemenet-1 AND statemenet-2 are individually sufficient then answer is "D".
4. if statemenet-1 & statemenet-2 are TOGETHER sufficient then answer is "C".
5. if statemenet-1 & statemenet-2 are not even TOGETHER sufficient then answer is "E".
