|
Author |
Message |
|
TAGS:
|
|
|
Director
Joined: 08 Jul 2004
Posts: 613
Followers: 1
Kudos [?]:
4
[0], given: 0
|
If X and Y are integers, what is the value of XY? (1) X^3 [#permalink]
 15 Sep 2004, 04:13
Question Stats:
0% (00:00) correct
 0% (00:00) wrong based on 0 sessions
14. If X and Y are integers, what is the value of XY?
(1) X^3 – 3X^2 – 2X – 8 = 0.
(2) 4 + 3Y = 2Y + 8
My aplogies folks, there are powers to x not coefficient.
S
Last edited by saurya_s on 15 Sep 2004, 08:21, edited 1 time in total.
|
|
|
|
|
|
|
Director
Joined: 20 Jul 2004
Posts: 601
Followers: 1
Kudos [?]:
3
[0], given: 0
|
Between C and E.
E, since we may get 3 dfferent values for x.
|
|
|
|
|
|
SVP
Joined: 16 Oct 2003
Posts: 1957
Followers: 2
Kudos [?]:
14
[0], given: 0
|
I think it is C. Can x be other than 4.
|
|
|
|
|
|
Director
Joined: 08 Jul 2004
Posts: 613
Followers: 1
Kudos [?]:
4
[0], given: 0
|
Sorry guys, I have justt edited the Q
S
|
|
|
|
|
|
Manager
Joined: 02 Apr 2004
Posts: 224
Location: Utrecht
Followers: 1
Kudos [?]:
0
[0], given: 0
|
I would say C.
st.1
x can be only 4 (I tried some values, so I hope this is correct).
Alone not sufficient
st.2
y is 4
Alone not sufficient
Together we can find the value of xy.
Please correct me if I am wrong.
Regards,
Alex
|
|
|
|
|
|
Director
Joined: 08 Jul 2004
Posts: 613
Followers: 1
Kudos [?]:
4
[0], given: 0
|
Hi ALex,
I was wondering what values did you try? Is there any way to limit the trial numbers?
S
|
|
|
|
|
|
Manager
Joined: 07 Sep 2004
Posts: 62
Followers: 1
Kudos [?]:
0
[0], given: 0
|
For the first one
x^3-3x^2-2x-8 = 0
(x-4)(x^2 +x+2) = 0
x = 4 or x^2+x+2 = 0 this quadratic equation has no solution since the discriminant is negative
so Our only solution is x = 4
That is why C is the right answer
|
|
|
|
|
|
Director
Joined: 05 May 2004
Posts: 602
Location: San Jose, CA
Followers: 1
Kudos [?]:
10
[0], given: 0
|
I got C as well
same mtd as amernassar
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Similar topics |
Author |
Replies |
Last post |
|
Similar
Topics:
|
 |
|
|
If x and 3x + y are integers, what is the value of y? (1) 0
|
ninomoi |
3 |
29 Oct 2004, 00:10 |
|
|
|
|
If 6xy = x2y + 9y, what is the value of xy? (1) y x = 3 (2)
|
ggarr |
2 |
13 May 2007, 17:46 |
 |
4
|
 |
If 6xy = (x^2)y + 9y, what is the value of xy? (1) y x = 3
|
gmatnub |
27 |
29 Jun 2008, 20:23 |
|
|
1
|
|
If 6xy = x^2y + 9y, what is the value of xy? (1) y x = 3 (2)
|
stingraybullray |
15 |
16 Jul 2008, 06:21 |
|
|
1
|
|
If 6xy = (x^2)y + 9y, what is the value of xy? (1) y - x = 3
|
brokerbevo |
4 |
04 Aug 2008, 11:19 |
|
|
|
|
|
|
close
