Is zero halfway between r and s

[ashan723]

On the number line shown, is zero halfway between r and s?
pic: <--r------s--t-->

1. s is to the right of zero
2. The distance between t and r is the same as the distance between t and -s

I chose b, statement 2 is suff by itself, and not statement 1.

The Official Answer is c

I figure you do not need statement 1, since statement 2 makes it sound like r and s are opposites of each other. If there were no picture, then I would have chosen c. Should I not pay attention to the number line picture on this question?

[siri2gmat]

ashan, try posting questions in Problem Solving questions, where many members would answer your questions

[jbs]

consider the following possibility and you will see why stmt 2 alone is not sufficient...
t= -1
s= -2
r= -4

all the best....

[ashan723]

Thanks jbs.

siri: I will remember that next time.