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GMAT 2: 760 Q51 V40
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x-y=?
Statement 1:
x=20
No way to link x with y
Insufficient
Statement 2: y/10= perfect square<20
Y/10= 4,9,16
Y= 40, 90, 160
Insufficient
Both statements together
x-y= -20,-70,-140
Insufficient
E

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Given :- All are straight lines
To find x-y where x and y are angles

Lines are straight but no information about the relationship between the lines such as whether they are parallel, perpendicular etc.

i) x=20 => we don't have y - Not Sufficient

ii) y/10 is a perfect square less than 20 => y=10, 40, 90, 160 - Again Not sufficient

Combining we can multiple values for x-y => Not Sufficient

Answer - E
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The official solution has been shared above. Good job - preetamsaha shameekv1989 sauravleo123
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Hi GMATWhizTeam ,
First of all, thank you for the detailed video on GMAT traps.

My 2 cents on the answer, the lines may or may not be parallel, hence can't say for sure the exact value of x-y. Just took me less time to solve this question.

Regards, Shashank
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