Is Zero midway S & -S ?
This topic has expert replies
- eaakbari
- Master | Next Rank: 500 Posts
- Posts: 435
- Joined: Mon Mar 15, 2010 6:15 am
- Thanked: 32 times
- Followed by:1 members
Answer is C
Info : r,s,t are real numbers whose sign is unknown, is zero halfway between r & s implying is r =- s ?
Statement (I)
s is right of zero
meaning s &b t are positive. Insuff
Statement (II)
Distance between t & r is same as distance between t & -s
This gives rise to 2 cases
1) r = -s
2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=-1 & -s = 1)
Hence Insuff
(I) &(II) together,
Since statement (I) conflicts with case 2 of (II), this leaves only case 1 which implies r=-s and zero lies between them.
Hence Suff
Answer - C
Info : r,s,t are real numbers whose sign is unknown, is zero halfway between r & s implying is r =- s ?
Statement (I)
s is right of zero
meaning s &b t are positive. Insuff
Statement (II)
Distance between t & r is same as distance between t & -s
This gives rise to 2 cases
1) r = -s
2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=-1 & -s = 1)
Hence Insuff
(I) &(II) together,
Since statement (I) conflicts with case 2 of (II), this leaves only case 1 which implies r=-s and zero lies between them.
Hence Suff
Answer - C
Last edited by eaakbari on Tue Nov 13, 2012 12:42 pm, edited 1 time in total.
Whether you think you can or can't, you're right.
- Henry Ford
- Henry Ford
-
- Senior | Next Rank: 100 Posts
- Posts: 63
- Joined: Tue Apr 06, 2010 10:01 pm
- Thanked: 4 times
- Followed by:1 members
eaakbari wrote:Answer is C
2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=1 & -s = 1)
Hence Insuff
But if distance between t and r is 4 and distance between t and -s is 1...which is voilating statement 2.
- eaakbari
- Master | Next Rank: 500 Posts
- Posts: 435
- Joined: Mon Mar 15, 2010 6:15 am
- Thanked: 32 times
- Followed by:1 members
It was a typo, I meant t=-1. Have edited the statement.prat_agl wrote:eaakbari wrote:Answer is C
2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=1 & -s = 1)
Hence Insuff
But if distance between t and r is 4 and distance between t and -s is 1...which is voilating statement 2.
Thanks
Whether you think you can or can't, you're right.
- Henry Ford
- Henry Ford
- nisagl750
- Master | Next Rank: 500 Posts
- Posts: 145
- Joined: Tue Jan 31, 2012 6:50 am
- Location: New Delhi
- Thanked: 16 times
- Followed by:2 members
- GMAT Score:760
Missed this....eaakbari wrote: 2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=-1 & -s = 1)
thanks