by: Bunuel
35 mins
by: Bunuel
35 mins
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Difficulty:
65%
(hard)
Question Stats:
34% (01:01) correct
66%
(01:10)
wrong
based on 106
sessions
History
Date
Time
Result
Not Attempted Yet
Is P a prime number, if P is an integer?
(1) P has odd number of factors.
(2) P = R^2
Self made
_________________
(1) P has odd number of factors.
(2) P = R^2
Self made
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
_________________
Great Question chetan2u
Here is my solution ->
Given info=> P is an integer
We need to see if its prime or not
Statement 1
P has odd number of factors.
Rule -> A perfect square has odd number of factors
And conversely -> Any number that has odd number of factors must be a perfect square.
So So P can be => {1,4,9,16,25}
Hence P=x^2 where x is an integer.
Its Safe to say that P will never be prime.
Hence Sufficient
Statement 2
Here P=R^2
But no clue of R is given.
If R=√2 => P=2 which is prime
if R=2 => P=4 which is not a prime number.
Hence This statement is not sufficient.
Hence A
Also Can you post a solution to this one-> the-units-digit-of-n-p-and-n-q-are-6-and-4-respectively-what-is-the-229444.html
Regards
Stone Cold
Here is my solution ->
Given info=> P is an integer
We need to see if its prime or not
Statement 1
P has odd number of factors.
Rule -> A perfect square has odd number of factors
And conversely -> Any number that has odd number of factors must be a perfect square.
So So P can be => {1,4,9,16,25}
Hence P=x^2 where x is an integer.
Its Safe to say that P will never be prime.
Hence Sufficient
Statement 2
Here P=R^2
But no clue of R is given.
If R=√2 => P=2 which is prime
if R=2 => P=4 which is not a prime number.
Hence This statement is not sufficient.
Hence A
Also Can you post a solution to this one-> the-units-digit-of-n-p-and-n-q-are-6-and-4-respectively-what-is-the-229444.html
Regards
Stone Cold
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