The best thing to do with absolute value questions is test positive and negative numbers.
1) they could be positive or negative. INSUFFICIENT
2) again could be positive or negative. 3 and 3 works, so does 3 and -3. INSUFFICIENT
answer is E as both are essentially giving you the same info.
number system
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Jim@StratusPrep
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this thread needs to be placed in DS section
my sol. follows
st(1) implies |x|=|y| Insuff
st(2) implies (|x|-|y|)^2=0 OR |x|-|y|=0 which is the same as |x|=|y| Insuff
Combining both still Insuff, as both statements imply the same condition
e
my sol. follows
st(1) implies |x|=|y| Insuff
st(2) implies (|x|-|y|)^2=0 OR |x|-|y|=0 which is the same as |x|=|y| Insuff
Combining both still Insuff, as both statements imply the same condition
e
piyush272 wrote:data sufficiency!??
is x=y?
1)x^2=y^2
2)|x|^2 + |y|^2 = 2|xy|
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