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Is p = |p|? (1) p is prime (2) p is even
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03 Dec 2018, 22:09
2
If p is positive, mod p = p If p is negative, mod p = -p
1) Prime numbers are defined for positive integers, so statement 1 us sufficient.
2) odd and even numbers are defined only in reference to the set of integers (..., −3, −2, −1, 0, 1, 2, 3, ...), all negative numbers can also be either odd or even. So statement 2 is not sufficient.
Re: Is p = |p|? (1) p is prime (2) p is even
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03 Dec 2018, 22:11
gmatbusters wrote:
If p is positive, mod p = p If p is negative, mod p = -p
1) Prime numbers are defined for positive integers, so statement 1 us sufficient.
2) odd and even numbers are defined only in reference to the set of integers (..., −3, −2, −1, 0, 1, 2, 3, ...), all negative numbers can also be either odd or even. So statement 2 is not sufficient.
Answer = A
Had no info about the highlighted portion. Thanks, sir. _________________
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Re: Is p = |p|? (1) p is prime (2) p is even
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03 Dec 2018, 22:18
Afc0892 wrote:
gmatbusters wrote:
If p is positive, mod p = p If p is negative, mod p = -p
1) Prime numbers are defined for positive integers, so statement 1 us sufficient.
2) odd and even numbers are defined only in reference to the set of integers (..., −3, −2, −1, 0, 1, 2, 3, ...), all negative numbers can also be either odd or even. So statement 2 is not sufficient.
Answer = A
Had no info about the highlighted portion. Thanks, sir.
Yes we don't take care of these things and ultimately do mistake.. Good that this question came up so that we added new info in our preparation matrix.
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Re: Is p = |p|? (1) p is prime (2) p is even
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03 Dec 2018, 22:28
gmatbusters wrote:
If p is positive, mod p = p If p is negative, mod p = -p
1) Prime numbers are defined for positive integers, so statement 1 us sufficient.
2) odd and even numbers are defined only in reference to the set of integers (..., −3, −2, −1, 0, 1, 2, 3, ...), all negative numbers can also be either odd or even. So statement 2 is not sufficient.
Answer = A
gmatbusters as per statement 1 , wont we get many values of P i.e 2,3,5,7 , i think it would be insufficient
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Re: Is p = |p|? (1) p is prime (2) p is even
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03 Dec 2018, 22:33
Archit3110 wrote:
gmatbusters wrote:
If p is positive, mod p = p If p is negative, mod p = -p
1) Prime numbers are defined for positive integers, so statement 1 us sufficient.
2) odd and even numbers are defined only in reference to the set of integers (..., −3, −2, −1, 0, 1, 2, 3, ...), all negative numbers can also be either odd or even. So statement 2 is not sufficient.
Answer = A
gmatbusters as per statement 1 , wont we get many values of P i.e 2,3,5,7 , i think it would be insufficient
The question is only asking if p is positive or not. So only Value you get is "Yes it is +ve".
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Is p = |p|? (1) p is prime (2) p is even
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03 Dec 2018, 22:34
Afc0892 wrote:
Archit3110 wrote:
Bunuel wrote:
Is p = |p|?
(1) p is prime (2) p is even
From 1: p is prime : p can be 2,3,5,7... not sufficient
From 2: p is even : 2,4,6,8... not sufficient
From 1 & 2: only possible value is 2 IMO C.
Hey Archit,
The question is just asking whether P = P. It'll always be true. Hence A is sufficient.
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Afc0892 thats what i thought so, but ideally in DS questions we can say the statement to be sufficient if we have a definite value..
A would be correct if we need to only prove that the relation P=IPI is true , where as C would give us a definite value and as P = +2 which I think would be correct option..
I some what do agree with option A as prime no are only +ve no. so p=lpl would always stand true for all prime no. isnt it in DS that we need to find a definite answer /value to make the statement stand sufficient?
GMATinsight : Sir could you please see into this question ...
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Re: Is p = |p|? (1) p is prime (2) p is even
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04 Dec 2018, 03:01
Archit3110 wrote:
Afc0892 thats what i thought so, but ideally in DS questions we can say the statement to be sufficient if we have a definite value..
A would be correct if we need to only prove that the relation P=IPI is true , where as C would give us a definite value and as P = +2 which I think would be correct option..
I some what do agree with option A as prime no are only +ve no. so p=lpl would always stand true for all prime no. isnt it in DS that we need to find a definite answer /value to make the statement stand sufficient?
GMATinsight : Sir could you please see into this question ...
There are two types of data sufficiency questions:
1. YES/NO DS Questions:
In a Yes/No Data Sufficiency questions, statement(s) is sufficient if the answer is “always yes” or “always no” while a statement(s) is insufficient if the answer is "sometimes yes" and "sometimes no".
2. VALUE DS QUESTIONS:
When a DS question asks about the value of some variable, then the statement(s) is sufficient ONLY if you can get the single numerical value of this variable.
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Is p = |p|? (1) p is prime (2) p is even
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04 Dec 2018, 11:14
Archit3110 wrote:
thats what i thought so, but ideally in DS questions we can say the statement to be sufficient if we have a definite value..
A would be correct if we need to only prove that the relation P=IPI is true , where as C would give us a definite value and as P = +2 which I think would be correct option..
I some what do agree with option A as prime no are only +ve no. so p=lpl would always stand true for all prime no. isnt it in DS that we need to find a definite answer /value to make the statement stand sufficient?
GMATinsight : Sir could you please see into this question ...
Hi Archit3110, That's the beauty of GMAT DS questions.. You have to be very sure what question is asking.
Lets take an example.. If I ask you .. Do you want to visit a Hill station ? The answer you will give is either Yes or No or Maybe. So, Yes or No are definite answer and Maybe is not definite.
Here there can be many hillstation but that doesn't matter as question is asked if you want to visit or not. Yes - Definite No - Definite Maybe - Indefinite.
If you started thinking kulu, manali, Shimla .. you are gone .
So, Try to analyse question first what the question is asking. The actual GMAT questions will be so simple that you can sometimes fall in the trick and mark wrong answers.
Hope that helps.
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Re: Is p = |p|? (1) p is prime (2) p is even
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07 Dec 2018, 03:52
Archit3110 wrote:
Afc0892 wrote:
Bunuel wrote:
Is p = |p|?
(1) p is prime (2) p is even
From 1: p is prime : p can be 2,3,5,7... not sufficient
From 2: p is even : 2,4,6,8... not sufficient
From 1 & 2: only possible value is 2 IMO C.
Hey Archit,
The question is just asking whether P = P. It'll always be true. Hence A is sufficient.
Posted from my mobile device
Afc0892 thats what i thought so, but ideally in DS questions we can say the statement to be sufficient if we have a definite value..
A would be correct if we need to only prove that the relation P=IPI is true , where as C would give us a definite value and as P = +2 which I think would be correct option..
I some what do agree with option A as prime no are only +ve no. so p=lpl would always stand true for all prime no. isnt it in DS that we need to find a definite answer /value to make the statement stand sufficient?
GMATinsight : Sir could you please see into this question ...
We combine two statements only when the statements alone are NOT sufficient to answer the question
Here the question is "Is p = |p|?" which needs to be answered in the form of YES/NO
As soon as we use the first statement which states that p is Prime (which are essentially positive integers) then we can answer the question with a Definitely YES hence statement 1 alone is sufficient.
Since this alone is sufficient so we can strike off option C at this stage only so that the question of C to be a potential answer does NOT arise while using statement 2 alone.
I hope this helps!!1
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Re: Is p = |p|? (1) p is prime (2) p is even
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07 Dec 2018, 04:02
Here the question is "Is p = |p|?" which needs to be answered in the form of YES/NO
As soon as we use the first statement which states that p is Prime (which are essentially positive integers) then we can answer the question with a Definitely YES hence statement 1 alone is sufficient.
Since this alone is sufficient so we can strike off option C at this stage only so that the question of C to be a potential answer does NOT arise while using statement 2 alone.
close
66% (00:28) correct 
.. thanks for replying..
