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GMAT Prep Question 2

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GMAT Prep Question 2

by TSonam » Wed Dec 12, 2007 10:20 am
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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by Suyog » Wed Dec 12, 2007 4:17 pm
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...
Thanks!
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by NSNguyen » Thu Dec 13, 2007 8:24 am
we do not know r <0> 0. m <0> 0
so the ans should be E.
Please share your idea and your reasoning :D
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by TSonam » Tue Dec 18, 2007 6:13 am
answer is E.

somebody provide a more detailed explaination?
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by Riggz » Wed Dec 19, 2007 11:43 am
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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