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Director
Joined: 16 May 2014
Posts: 592
Given Kudos: 0
GRE 1: Q165 V161
GRE Math Challenge #42-If a positive integer n has
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28 Feb 2015, 03:14
28 Feb 2015, 03:14
1
Expert Reply
If a positive integer n has exactly two positive factors what is the value of n?
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Kudos for the right answer and explanation
Quantity A |
Quantity B |
\(\frac{n}{2}\) is a factor of n |
LCM \((n,n+10)\) is an even number |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Kudos for the right answer and explanation
Re: GRE Math Challenge #42-If a positive integer n has
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11 Mar 2018, 05:25
11 Mar 2018, 05:25
1
soumya1989 wrote:
If a positive integer n has exactly two positive factors what is the value of n?
I. n/2 is a factor of n
II.LCM(n,n+10) is an even number.
A. Statement A is enough to answer the question
B. Statement B is enough to answer the question
C. Both statements are needed.
D. None of the statements are needed to answer the question
I. n/2 is a factor of n
II.LCM(n,n+10) is an even number.
A. Statement A is enough to answer the question
B. Statement B is enough to answer the question
C. Both statements are needed.
D. None of the statements are needed to answer the question
For this question, my answer would be A and B, but I am uncertain. Here is what I thought.
The stem tells us that a a positive integer n has exactly two positive factors. That clearly shows that b is a PRIME.
Then, for one of factor of n to be divisible by 2, we can deduce that n is 2. Thus, statement I (A?) is enough to answer the question.
For II, LCM(n,n+10) is an even number. only prime number 2 satisfy the statement, Thus, statement II (B?) is enough to answer the question.
Thus, I chose A and B. But, I exclude C, since A and B are NOT both needed.
Re: GRE Math Challenge #42-If a positive integer n has
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28 May 2020, 18:46
28 May 2020, 18:46
can anybody give proper explanation?
