gmat pp

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kajcha: Master | Next Rank: 500 Posts; Posts: 321; Joined: Tue Aug 28, 2007 5:42 am; Thanked: 1 times

by kajcha » Fri Sep 28, 2007 12:10 pm

I will go with None

Traingles have this property " Sum of any 2 sides must be greater than the 3rd one"

In any case this propery is not satisfied.

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Source: Beat The GMAT — Problem Solving | Fri Sep 28, 2007 12:10 pm

jcan-gmatter: Junior | Next Rank: 30 Posts; Posts: 17; Joined: Thu Jul 05, 2007 9:08 am; Location: Kingston, Jamaica

Answer should be none ..

by jcan-gmatter » Fri Sep 28, 2007 12:11 pm

Hello nandish,

A rule for triangle states that the sum of any two sides must be greater than the length of the 3rd side.

Hence, if the sum of 2 sides is 7 (5 +2), then the length of the 3rd side must be either 6 or 5 or 4. You cannot include 3 because then you'll have a triangle with sides of 2, 3, 5 and 2 + 3 is not greater than 5.

Assume then that the 3rd side is: -
6 => 6 + 5 + 2 = 13 (Perimeter)
5 => 5 + 5 + 2 = 12 (Perimeter)
4 => 4 + 5 + 2 = 11 (Perimeter)

Which is not equal to any of the answer choices. Therefore, the answer to the question is None (option 1).

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