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# taken from the gmat math bible: In triangle MNP, if MN = x,

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Intern
Joined: 10 Jul 2009
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taken from the gmat math bible: In triangle MNP, if MN = x, [#permalink]

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06 Aug 2009, 01:55
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taken from the gmat math bible:

In triangle MNP, if MN = x, NP = 2x, and MP = y, which of the three angles has the greatest degree measure?

(1) MNP is a right triangle.
(2) y < 2x

I dont' agree with the answer provided. i can post later how i disproved it. What do you think should be the answer?

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Re: Triangles [#permalink]

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06 Aug 2009, 02:23
[quote="tomirisk"]taken from the gmat math bible:

In triangle MNP, if MN = x, NP = 2x, and MP = y, which of the three angles has the greatest degree measure?

(1) MNP is a right triangle.
(2) y < 2x

from 1

no relation between the sides lenghts .....insuff

from 2
y<2x, 2x>x thus surely the angel corresponding to the 2x is the largest.

I d say B
Intern
Joined: 10 Jul 2009
Posts: 44
Re: Triangles [#permalink]

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06 Aug 2009, 02:29
yezz wrote:
tomirisk wrote:
taken from the gmat math bible:

In triangle MNP, if MN = x, NP = 2x, and MP = y, which of the three angles has the greatest degree measure?

(1) MNP is a right triangle.
(2) y < 2x

from 1

no relation between the sides lenghts .....insuff

from 2
y<2x, 2x>x thus surely the angel corresponding to the 2x is the largest.

I d say B

what about the pythagorian triplet: x:x(sqrt3):2x? is this not sufficient for comleting relation in the statement 1?
Manager
Joined: 18 Jul 2009
Posts: 166
Location: India
Schools: South Asian B-schools
Re: Triangles [#permalink]

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06 Aug 2009, 03:11
i think ans is B

Statement (1) MNP is a right triangle .... in any right angle triangle 90 deg is the greatest angle...since it is not given which angle is 90 ...there are two possibilities...( as 2x > x this means x cannot be hypoteneous as 2x will always be there as a higher side qualifying to be a hypoteneous... and hence P cannot be 90.... thus MN cannot be hypoteneous)

angle N = 90 or [M = 90 deg (pythagorian triplet)]..... insufficient

Statement (2) y < 2x also we know that x < 2x (similar explination as in statement 1....possibility of N = 90 is negated by this statement) only possibility is M = 90 ....sufficient

if u lik my post.....consider it for Kudos
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Bhushan S.
If you like my post....Consider it for Kudos

Intern
Joined: 10 Jul 2009
Posts: 44
Re: Triangles [#permalink]

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06 Aug 2009, 03:20
bhushan252 wrote:
i think ans is B

Statement (1) MNP is a right triangle .... in any right angle triangle 90 deg is the greatest angle...since it is not given which angle is 90 ...there are two possibilities...( as 2x > x this means x cannot be hypoteneous as 2x will always be there as a higher side qualifying to be a hypoteneous... and hence P cannot be 90.... thus MN cannot be hypoteneous)

angle N = 90 or [M = 90 deg (pythagorian triplet)]..... insufficient

Statement (2) y < 2x also we know that x < 2x (similar explination as in statement 1....possibility of N = 90 is negated by this statement) only possibility is M = 90 ....sufficient

if u lik my post.....consider it for Kudos

bhushan252, thank you for your post, but as a little challenge can you provide any example of a right triangle in a situation when angle N= 90, thus x and 2x are legs and y hypothenuse? try to pick real numbers.
Manager
Joined: 15 Jun 2009
Posts: 135
Re: Triangles [#permalink]

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06 Aug 2009, 03:35
IMO B....

1) Insuff....sa right angle can be at M,N or p...

2) Suff as y < 2x ...so angle opposite to 2x will be greatest...
Intern
Joined: 10 Jul 2009
Posts: 44
Re: Triangles [#permalink]

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06 Aug 2009, 03:54
thank you guys for explanations..i was just overthinking the question. Tried different numbers and yes, it is possible for N or M to be=90, which makes the 1 stm insufficient, and thus B is the answer.
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Joined: 18 Jul 2009
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Location: India
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Re: Triangles [#permalink]

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06 Aug 2009, 04:45
tomirisk wrote:
bhushan252 wrote:
i think ans is B

Statement (1) MNP is a right triangle .... in any right angle triangle 90 deg is the greatest angle...since it is not given which angle is 90 ...there are two possibilities...( as 2x > x this means x cannot be hypoteneous as 2x will always be there as a higher side qualifying to be a hypoteneous... and hence P cannot be 90.... thus MN cannot be hypoteneous)

angle N = 90 or [M = 90 deg (pythagorian triplet)]..... insufficient

Statement (2) y < 2x also we know that x < 2x (similar explination as in statement 1....possibility of N = 90 is negated by this statement) only possibility is M = 90 ....sufficient

if u lik my post.....consider it for Kudos :wink:

bhushan252, thank you for your post, but as a little challenge can you provide any example of a right triangle in a situation when angle N= 90, thus x and 2x are legs and y hypothenuse? try to pick real numbers.

ok..dont go for substitution try this out...if N = 90....then (2x)^2 + x^2 = y^2 that gives y= sqrt5 * x which is 2.23x...highest now plug any values for x

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Bhushan S.
If you like my post....Consider it for Kudos

Re: Triangles   [#permalink] 06 Aug 2009, 04:45
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# taken from the gmat math bible: In triangle MNP, if MN = x,

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