Difference between revisions of "2006 AIME I Problems/Problem 11"

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== Problem ==
 
== Problem ==
A collection of 8 cubes consists of one cube with edge-length <math> k </math> for each integer <math> k, 1 \le k \le 8. </math> A tower is to be built using all 8 cubes according to the rules:  
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A collection of 8 [[cube (geometry) | cube]]s consists of one cube with edge-length <math> k </math> for each [[integer]] <math> k, 1 \le k \le 8. </math> A tower is to be built using all 8 cubes according to the rules:  
  
 
* Any cube may be the bottom cube in the tower.
 
* Any cube may be the bottom cube in the tower.
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Let <math> T </math> be the number of different towers than can be constructed. What is the remainder when <math> T </math> is divided by 1000?
 
Let <math> T </math> be the number of different towers than can be constructed. What is the remainder when <math> T </math> is divided by 1000?
 
 
 
 
  
 
== Solution ==
 
== Solution ==
 
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{{solution}}
 
 
 
 
 
 
 
== See also ==
 
== See also ==
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* [[2006 AIME I Problems/Problem 10 | Previous problem]]
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* [[2006 AIME I Problems/Problem 12 | Next problem]]
 
* [[2006 AIME I Problems]]
 
* [[2006 AIME I Problems]]
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[[Category:Intermediate Combinatorics Problems]]

Revision as of 11:21, 30 October 2006

Problem

A collection of 8 cubes consists of one cube with edge-length $k$ for each integer $k, 1 \le k \le 8.$ A tower is to be built using all 8 cubes according to the rules:

  • Any cube may be the bottom cube in the tower.
  • The cube immediately on top of a cube with edge-length $k$ must have edge-length at most $k+2.$

Let $T$ be the number of different towers than can be constructed. What is the remainder when $T$ is divided by 1000?

Solution

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See also