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well, what do u mean by p q, it is a little ambiguous, the way 1) and 2) aresanju09 wrote:Is p q a prime number?
(1) p is a prime number.
(2) q is a fraction.
Not a great doubt, how do we take p q as, by the way?ajith wrote:well, what do u mean by p q, it is a little ambiguous, the way 1) and 2) aresanju09 wrote:Is p q a prime number?
(1) p is a prime number.
(2) q is a fraction.
is it p+q or p*q or something else?
well, it depends, if it is 7 9 it doesnt make much sense unless it is treated as 79sanju09 wrote:
Not a great doubt, how do we take p q as, by the way?
How on earth could p q possibly become p + q?ajith wrote:well, it depends, if it is 7 9 it doesnt make much sense unless it is treated as 79sanju09 wrote:
Not a great doubt, how do we take p q as, by the way?
if it is 7 1/2 it can either be 7&1/2 or 7*1/2 hence the doubt.
Not a great clarification either (tit for tat)
12 1/2 ==== can be 12+1/2 and your answer choices give an indication that q is a fraction.sanju09 wrote: How on earth could p q possibly become p + q?
there are no choices as suchajith wrote:12 1/2 ==== can be 12+1/2 and your answer choices give an indication that q is a fraction.sanju09 wrote: How on earth could p q possibly become p + q?
I have made my point very clear without a story. (I am not quite sure where will that put me in smartness scale)
Oh yeah you certainly did! But that's mere information served in the form of statement (2) of the DS question, which must not be taken as an answer choice. Moreover, if the two unknown variables, p and q were to replace 7 and ½, respectively, then 7 ½ must have to be written as p + q, and 7 * ½ as p q. Don't you agree?ajith wrote:Oh did I read q is a fraction?sanju09 wrote:Is p q a prime number?
(2) q is a fraction.
And what do you mean by 'q is a fraction'? Fractions are not a category of number; they are a way of expressing a number. Any number can be written as a fraction: we can write 5 as 10/2, or sqrt(2) as 2/sqrt(2), for example. So Statement 2 above tells you nothing about q.ajith wrote:well, what do u mean by p q, it is a little ambiguous, the way 1) and 2) aresanju09 wrote:Is p q a prime number?
(1) p is a prime number.
(2) q is a fraction.
...and hence the answer to this question is...Ian?And what do you mean by 'q is a fraction'? Fractions are not a category of number; they are a way of expressing a number. Any number can be written as a fraction: we can write 5 as 10/2, or sqrt(2) as 2/sqrt(2), for example. So Statement 2 above tells you nothing about q...
[spoiler]OA E[/spoiler]Stuart Kovinsky wrote:OK.. enough bickering! Here's how the question almost certainly should have been written:
Is pq a prime number?
- when we see two variables side by side, the conventional interpretation is that they're multiplied together.
(1) p is prime.
If p is prime and q is 1, then pq will be prime. If p is prime and q is 2, then pq won't be prime: insufficient.
(2) q is a proper fraction.
- the only reasonable interpretation of (2).
If q is 1/2 and p is 4, then pq is prime; if q is 1/2 and p is 12, then pq isn't prime: insufficient.
Together:
if p=5 and q=1/2, then pq isn't prime.
if p=5 and q=3/5, then pq is prime.
Still insufficient, choose E.
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