The Math Forum

For anyone with a love of math
 
HomeHome  CalendarCalendar  GalleryGallery  FAQFAQ  SearchSearch  MemberlistMemberlist  UsergroupsUsergroups  RegisterRegister  Log in  

Share | 
 

 Simple Problem:

View previous topic View next topic Go down 
AuthorMessage
AIME15
Hardcore TMF user
Hardcore TMF user
avatar

Number of posts : 163
Age : 20
Location : Pleasanton, CA
Registration date : 2008-08-13

PostSubject: Simple Problem:   Thu Aug 21, 2008 10:02 am

One cube has a volume of 343 cubic centimeters. The edge length of a second cube is three times the edge length of this first cube. What is the positive difference between the volume of the second cube and the volume of the first cube, in cubic centimeters?

Source: 2006 State Chapter Mathcounts

_________________
-AIME15, Moderator of Algebra Forum
Back to top Go down
View user profile
isabella2296
Admin
Admin


Number of posts : 45
Location : You'd really like to know, wouldn't you?
Registration date : 2008-08-16

PostSubject: Re: Simple Problem:   Thu Aug 21, 2008 1:06 pm

This means that the cube has a side length of 7. 21^3 - 7^3 = 8918.

Haha, you stole this from FTW.
Back to top Go down
View user profile
AIME15
Hardcore TMF user
Hardcore TMF user
avatar

Number of posts : 163
Age : 20
Location : Pleasanton, CA
Registration date : 2008-08-13

PostSubject: Re: Simple Problem:   Thu Aug 21, 2008 1:59 pm

I actually got it from looking at old MC.

A chord of the larger circle of two concentrics circles is tangent to the smaller ( inner ) circle and measures 14 inches. The number of square inches in the area outside the smaller circle and inside the larger circle can be expressed as x PI . Find x.

_________________
-AIME15, Moderator of Algebra Forum
Back to top Go down
View user profile
pythag011
School Math Nerd
School Math Nerd
avatar

Number of posts : 15
Registration date : 2008-08-17

PostSubject: Re: Simple Problem:   Thu Aug 21, 2008 2:19 pm

x = 49. Why?

Because, Using pythagorean thereom, we get a^2 - b^2 = 49, and by ares, x = 49.

BTW, does any want to make this a Geometry Marathon?
Back to top Go down
View user profile
isabella2296
Admin
Admin


Number of posts : 45
Location : You'd really like to know, wouldn't you?
Registration date : 2008-08-16

PostSubject: Re: Simple Problem:   Tue Aug 26, 2008 11:40 am

I deleted it.



Prove that if a triangle has the same lengths as a right triangles(e.g., 3-4-5) then it must be a right triangle too.
Back to top Go down
View user profile
Sponsored content




PostSubject: Re: Simple Problem:   

Back to top Go down
 
Simple Problem:
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» simple number flashcards 1-20
» Silverfish problem....
» Only one simple letter, thats all i need. Please Help.
» Boilermate 2 - problem refillling the system
» Erratic hot water and central heating - BoilerMate 2 thermostat problem or main bolier problem?

Permissions in this forum:You cannot reply to topics in this forum
The Math Forum :: Middle School Topics :: Geometry-
Jump to: