Is s and t are 2 different numbers on the number line, is s+t equal to 0.
1. The distance between s and 0 is the same as the distance between t and 0.
2. 0 is between s and t.
OA A
gmat prep
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S+T = 0
only way this could be possible, when lsl = ltl, but either s or t has to be negative and other one has to be positive
Statement I
ls-0l = l0-tl
lsl = ltl
Sufficient.
Statement II
0 is between s and t,
s could be -2 and t could be 1
or
s could be -1 and t could be 1
In both cases 0 is between s and t.
Insufficient.
Hence A.
Hope this helps.
only way this could be possible, when lsl = ltl, but either s or t has to be negative and other one has to be positive
Statement I
ls-0l = l0-tl
lsl = ltl
Sufficient.
Statement II
0 is between s and t,
s could be -2 and t could be 1
or
s could be -1 and t could be 1
In both cases 0 is between s and t.
Insufficient.
Hence A.
Hope this helps.
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Actually in this question I guess it's easy to miss that s and t are 2 different numbers so s cannot be equal to t and that's why 'A' is the answer.