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Source: — Data Sufficiency |
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by AegisAshore » Mon Sep 13, 2010 5:02 pm
JeetGulia wrote:Please help with this problem
Let's define the following:
Angle PRS = x
Angel PQR = y

The question is asking 'What is x-y'?

1. Given QPR = 30

looking at triangle PQR, the following is true:
180=30+y+(180-x)
rearrange this and you get:
x-y=30

So the angle PRS is 30 degrees greater than the measure of angle PQR

Looking at statement 2:
2. PQR+PRQ=150 which tells you that QPR = 30, which is what was given in statement 1

Answer is D
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by JeetGulia » Tue Sep 14, 2010 12:37 am
AegisAshore wrote:
JeetGulia wrote:Please help with this problem
Let's define the following:
Angle PRS = x
Angel PQR = y

The question is asking 'What is x-y'?

1. Given QPR = 30

looking at triangle PQR, the following is true:
180=30+y+(180-x)
rearrange this and you get:
x-y=30

So the angle PRS is 30 degrees greater than the measure of angle PQR

Looking at statement 2:
2. PQR+PRQ=150 which tells you that QPR = 30, which is what was given in statement 1..Please can you expalin the 2nd stmt?

Answer is D
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