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4 times it’s supplement

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4 times it’s supplement

by sanju09 » Mon Aug 30, 2010 3:12 am
An angle exceeds 4 times it's supplement. Find the new angle formed if supplement is 30 degree.

A. 180
B. 200
C. 270
D. 330
E. None of these



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by Rahul@gurome » Mon Aug 30, 2010 3:42 am
sanju09 wrote:An angle exceeds 4 times it's supplement. Find the new angle formed if supplement is 30 degree.

A. 180
B. 200
C. 270
D. 330
E. None of these

[spoiler]Source: https://gmat.jumbotests.com[/spoiler]
Two angles are supplementary if their sum is 180º. So, other angle is 180º - 30º = 150º
Therefore, new angle formed = 150º + 4*30º = 150º + 120º = 270º

The correct answer is [spoiler](C)[/spoiler].
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by brijesh » Mon Aug 30, 2010 10:37 am
Thank you for the reply, but while reading the Q statement I could not understand about which angle it is talking about.

In Q`s statement : An angle is 4 times its supplement ( i.e. that angle is 30x 4= 120)

Find the new angle formed....this sentence seems vague. It is not distinctly telling about the angle (120+150)

plz explain?
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by sanju09 » Mon Aug 30, 2010 8:12 pm
brijesh wrote:Thank you for the reply, but while reading the Q statement I could not understand about which angle it is talking about.

In Q`s statement : An angle is 4 times its supplement ( i.e. that angle is 30x 4= 120)

Find the new angle formed....this sentence seems vague. It is not distinctly telling about the angle (120+150)

plz explain?
If x is the angle in stem, then 180 - x is its supplement. By definition, the new angle formed is x + 4 (180 - x); when 180 - x is 30, x is 150, and the new angle formed is

= x + 4 (180 - x)

= 150 + 4 (30)

= 150 + 120

= [spoiler]270

C

I am also not finding the wordings as evenly understood by one and all. Let's thank the source only.[/spoiler]
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by Ian Stewart » Tue Aug 31, 2010 4:24 am
sanju09 wrote:An angle exceeds 4 times it's supplement. Find the new angle formed if supplement is 30 degree.

A. 180
B. 200
C. 270
D. 330
E. None of these

[spoiler]Source: https://gmat.jumbotests.com[/spoiler]
I often see badly worded questions on this forum, but this one is among the worst. The word 'exceeds', for example, suggests we have an inequality here, but they clearly intend for the information to give an equation. The word 'it's' shouldn't have an apostrophe. It's an utter mystery, when they talk about 'the new angle formed', what angle they could possibly mean. And I could go on.

Not only is the question impenetrably written, it also tests material irrelevant to the GMAT (you don't need to know what a 'supplemental angle' is), so there is no reason to spend any time on it.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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by Arcane66 » Tue Aug 31, 2010 1:20 pm
Ian Stewart wrote:
I often see badly worded questions on this forum, but this one is among the worst. The word 'exceeds', for example, suggests we have an inequality here, but they clearly intend for the information to give an equation. The word 'it's' shouldn't have an apostrophe. It's an utter mystery, when they talk about 'the new angle formed', what angle they could possibly mean. And I could go on.

Not only is the question impenetrably written, it also tests material irrelevant to the GMAT (you don't need to know what a 'supplemental angle' is), so there is no reason to spend any time on it.
Could not agree more, Ian.
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