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# There are two solids 1 & 2. These solids are not of the

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Intern
Joined: 01 Aug 2003
Posts: 48
Location: Mumbai
There are two solids 1 & 2. These solids are not of the [#permalink]

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04 Aug 2003, 05:06
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There are two solids 1 & 2. These solids are not of the same type.Does Solid 1 have more no. of faces than Solid 2?
a) Solid 1 is a tetrahedron
b) Solid 2 is a rectangualar pyramid

Pls explain..
SVP
Joined: 03 Feb 2003
Posts: 1604

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04 Aug 2003, 05:43
a tetrahedron is a three-dimension object that has four faces
a rectangular pyramid has five faces

but to answer, you do not need to know what either means. You need just two numbers. Thus, C.
Manager
Joined: 24 Jun 2003
Posts: 146
Location: India

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04 Aug 2003, 05:57
mistdew wrote:
There are two solids 1 & 2. These solids are not of the same type.Does Solid 1 have more no. of faces than Solid 2?
a) Solid 1 is a tetrahedron
b) Solid 2 is a rectangualar pyramid

Pls explain..

A tetrahedron and rectangular pyramid have the same number of faces. Therefore, (a) and (b) together are sufficient to arrive at the answer.
Intern
Joined: 01 Aug 2003
Posts: 48
Location: Mumbai

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04 Aug 2003, 20:15
Hi
The answer i have is "Solid 1 is a tetrahedron. A tetrahedron has 4 faces.No solid can have less no. of faces than a tetrahedron. Hence 1 alone is sufficient. - thus A.
I thought it was C myself and I cant figure outt his explanation.Is the above expln wrong
SVP
Joined: 03 Feb 2003
Posts: 1604

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05 Aug 2003, 03:36
you have tricked us with amazing ease
However, we need to know what Solid 2 is, for it could be the same tetrahedron of different type.

I insist on C.
GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE

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05 Aug 2003, 08:16
stolyar wrote:
you have tricked us with amazing ease
However, we need to know what Solid 2 is, for it could be the same tetrahedron of different type.

I insist on C.

I vote with Mistdew.

A tetrahedron, by its very name, means 4-sides. Any other polyhedron with 4 side is in fact also a tetrahedron. Hence, since the statement states that they are different, any different solid must have more since the tetradron has the least number of sides of any type of polyhedron.

The nitpicking here is what consitutes a different type?
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

Intern
Joined: 22 Jul 2010
Posts: 32

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26 Jul 2010, 07:09
i believe C is the answer because with A, the second solid can be a sphere...so we need to define solid 2...pls correct me if I am wrong...
Re: DS   [#permalink] 26 Jul 2010, 07:09
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