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TSonam
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 Posted: Wed Dec 12, 2007 10:20 am Post subject: GMAT Prep Question 2 |
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2) If m and r are two numbers on a number line, what is the value of r.
a) the distance between r and 0 is 3 times the distance between m and 0.
b) 12 is halfway between m and r
please provide explaination
Last edited by TSonam on Thu Dec 13, 2007 5:35 am; edited 1 time in total |
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Suyog
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| Posted: Wed Dec 12, 2007 4:17 pm Post subject: |
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If m and r are two numbers on a number line, what is the value of 4.
I think there is something missing...can u recheck the qustion...
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NSNguyen
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| Posted: Thu Dec 13, 2007 8:24 am Post subject: |
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we do not know r <0> 0. m <0> 0
so the ans should be E.
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| Posted: Sun Dec 16, 2007 12:26 am Post subject: Re: GMAT Prep Question 2 |
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| TSonam wrote: | 2) If m and r are two numbers on a number line, what is the value of r.
a) the distance between r and 0 is 3 times the distance between m and 0.
b) 12 is halfway between m and r
please provide explaination |
I belive here the answer is C but not E.
Yes we dont whether r</>0 . m</0> atleast one of the 2 numbers must be on the right side of 12 on the number line .==> one must be either 13 , 14 ,15 ....so on....
Second will be on left side of 12.
Statement 1 gives the exact distance of respective points from 0. So both conditions will be satisfied only if one point is right side of 12 & second point is in between 0 & 12( Not to the left side of 12 because that will never satisfy that the distance between r and 0 is 3 times the distance between m and 0)
Now we know that one point is between 0 & 12 . Other pt is after 12 & 12 must be the mid of the 2 numbers ==> 6 ,12 ,18 are the only possible numbers satisfying both St1 & St2. Hence m= 6 & r=18 are the numbers.
So BOTH STATEMENTS ARE SUFFICIENT. HENCE it is C |
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TSonam
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| Posted: Tue Dec 18, 2007 6:13 am Post subject: |
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answer is E.
somebody provide a more detailed explaination? |
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Riggz
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| Posted: Wed Dec 19, 2007 11:43 am Post subject: |
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The answer is E.
We need the value of R
Statement 1) tells us the distance between R and 0 is 3 times the distance from M and 0. But the distance of M to 0 is not given.
Statement 2) only tells us the midpoint of the two points.
Taken together there is still more than one possible answer. Though 12 is the midpoint M and R could be M=6 R=18 or M=-12 R=36, and still satisfying both statements.
Therefore answer is E |
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