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1) Distance between r and O is 3 times m and O.
There can be several cases which fulfil this.
r=3, m=1 or r=3, m=-1 etc
INSUFFICIENT.
2) 12 is halfway between r and m.
There can be several such cases.
r=13, m=11 or r=10, m=14 etc
INSUFFICIENT
Both taken together,
There can be several such cases too.
r=18, m=6 or r=36 m=-12
Thus answer is E.
There can be several cases which fulfil this.
r=3, m=1 or r=3, m=-1 etc
INSUFFICIENT.
2) 12 is halfway between r and m.
There can be several such cases.
r=13, m=11 or r=10, m=14 etc
INSUFFICIENT
Both taken together,
There can be several such cases too.
r=18, m=6 or r=36 m=-12
Thus answer is E.
