Search found 8 matches
property numbers
Hi,
this is from gprep
If the integer n is greater than 1, is n=2?
(1) n has exactly two positive factors
(2) the difference of any two distinct positive factors of n is odd
I had problem in understanding if 1 has to be considered a positive factor or not
OA B[/img]
- by duccio
Sat Jan 17, 2009 4:01 am- Forum: Data Sufficiency
- Topic: property numbers
- Replies: 1
- Views: 1052
Re: Drama and music !
Hi, I think that the problem in this question is that it is actually asking for the percent of men of the "combined clubs" to the total. With combined it means male which are part both of Drama and Music. Even if you combine the two statements you cannnot determine how many of the male in ...
- by duccio
Thu Jan 15, 2009 6:56 am- Forum: Data Sufficiency
- Topic: Drama and music !
- Replies: 3
- Views: 1290
you are right, we actually do not know if r u t s are positive or negative
so A is INSUFF ===> C
yalanand wrote:I still think its C....because r,t,u,s are all variables which can be +ve or -ve...
- by duccio
Thu Jan 15, 2009 6:35 am- Forum: Data Sufficiency
- Topic: Slope DS
- Replies: 11
- Views: 2124
- by duccio
Thu Jan 15, 2009 6:21 am- Forum: Data Sufficiency
- Topic: Slope DS
- Replies: 11
- Views: 2124
Re: gmat set ds
statement (1) tells you that (X/100)*20 belongs to X and Y INSUFF statement (2) tells you that (Y/100)*30 belongs to Y and X INSUFF if you combine both statements together you know that the overlapping region of the two sets is the same, so you can write the following equation: (X/100)*20 =(Y/100)*3...
- by duccio
Thu Jan 15, 2009 6:10 am- Forum: Data Sufficiency
- Topic: gmat set ds
- Replies: 1
- Views: 1391
My solution is: I have 5 goal three of one team (winner) two of another team (loser). I have 5!/(2!*(5-2)!) = 10 possibilities of arrange a subgroup of two goal ( the one of the loser). I want that one of the first goal of the loser is in the first place, so I have 4!/(3!*(4-3)!)=4 possible arrangem...
- by duccio
Tue Jan 13, 2009 3:39 am- Forum: Problem Solving
- Topic: Soccer game
- Replies: 6
- Views: 2666
Re: GPREP problem
aj5105 wrote:If x is an integer, is (x^2 + 1)(x + 5) an even number?
1)X is an odd number
2)Each prime factor of x^2 is greater than 7.
Hi,
which is the OA? D?
- by duccio
Sun Jan 11, 2009 11:07 am- Forum: Data Sufficiency
- Topic: GPREP problem
- Replies: 2
- Views: 1257
Re: Equalities
Pls help 1 a<b so a-b<0 and b-a>0 1/(a-b)<0 and b-a>0 b-a>1/(a-b) suff 2 |a-b|>1 first case a-b>1 if a-b>0 <---> a>b <----> b<a <---> b-a<0 and 1/(a-b)>0 hence b-a<1/(a-b) or b-a>1 if a-b<0 <---> b>a <----> b-a>0 and a-b<0 <---> b-a>0 and 1/(a-b)<0 hence b-a>1/(a-b) two different values Insuff A
- by duccio
Mon Jan 05, 2009 7:55 am- Forum: Data Sufficiency
- Topic: Equalities
- Replies: 2
- Views: 1558