Source: Official Guide for the GMAT 13th Ed. Data Sufficiency; #166 Official Guide for the GMAT 2015 14th Ed. Data Sufficiency; #166

1

What is the value of x + y in

What is the value of x + y in the figure above?

2 Explanations

1

Tobias Meyerding

Hi Magoosh Team, could you explain, why Z and its complement angle add up to 190 (125+65) and not 180?
Thanks!

Dec 18, 2016 • Comment

Cydney Seigerman, Magoosh Tutor

Hi Tobias, thanks for your question! It looks like this is an error in the explanation video. The value of Z and its supplementary angle of Z is 180? (per the definition of supplementary angles). So, given Z = 125, then the supplement should be equal to 55, not 65. That said, in the context of the explanation, this mistake doesn't impact the overall analysis of the question itself.

That said, I hope this clarifies the explanation! Thanks again for your comment :)

Dec 19, 2016 • Reply

1

Gravatar Mike McGarry, Magoosh Tutor

Jan 5, 2014 • Comment

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Official Guide for GMAT Review 2016

Official Guide for the GMAT 2015 14th Ed.

Official Guide for the GMAT 13th Ed.

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Official Guide for the GMAT 12th Ed.

Revised GRE PDF 2nd Ed.


Section 6.3 Data Sufficiency

Section 6.3 Data Sufficiency

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