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a+b or d+e

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a+b or d+e [#permalink] New post   26 Feb 2021, 06:39
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Quantity A
Quantity B
a+b
d+e



A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
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C
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Re: a+b or d+e [#permalink] New post   26 Feb 2021, 07:21
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Solution:

Though the lines look like lines in a rectangular coordinate system, it is possible they are not 90 degrees. But we know for sure, that these are straight lines which are vertically opposite, thus, their angles will also be same.

Therefore a+b=d+e, similarly, c=f. However, we cannot be sure that c=d+e or c=a+b

IMO C

Hope this helps!
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Re: a+b or d+e [#permalink] New post   24 Mar 2021, 12:25
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How can we be sure lines are vertically opposite?
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Re: a+b or d+e [#permalink] New post   29 Mar 2021, 06:18
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FCOCGALVAN wrote:
How can we be sure lines are vertically opposite?


On the GRE, any lines that appear to be straight are straight.
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Re: a+b or d+e [#permalink] New post   30 Mar 2021, 10:01
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FCOCGALVAN wrote:
How can we be sure lines are vertically opposite?


Think about 2 lines (NOT lines) only intersecting each other. It is easy to find opposite angles.

First two lines when A & D angles have been created. now you can realize a & d are opposite angles and equal.

The same applies to the other two angles.
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Re: a+b or d+e [#permalink]
30 Mar 2021, 10:01
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