Difference between revisions of "2009 AMC 8 Problems/Problem 18"
Mrdavid445 (talk | contribs) (Created page with "The diagram represents a <math> 7</math>-foot-by-<math> 7</math>-foot floor that is tiled with <math> 1</math>-square-foot black tiles and white tiles. Notice that the corners ha...") |
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<math> \textbf{(A)}\ 49 \qquad \textbf{(B)}\ 57 \qquad \textbf{(C)}\ 64 \qquad \textbf{(D)}\ 96 \qquad \textbf{(E)}\ 126</math> | <math> \textbf{(A)}\ 49 \qquad \textbf{(B)}\ 57 \qquad \textbf{(C)}\ 64 \qquad \textbf{(D)}\ 96 \qquad \textbf{(E)}\ 126</math> | ||
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| + | ==See Also== | ||
| + | {{AMC8 box|year=2009|num-b=17|num-a=19}} | ||
Revision as of 16:50, 5 November 2012
The diagram represents a 
-foot-by--foot floor that is tiled with 
-square-foot black tiles and white tiles. Notice that the corners have white tiles. If a 
-foot-by--foot floor is to be tiled in the same manner, how many white tiles will be needed?
![[asy]unitsize(10); draw((0,0)--(7,0)--(7,7)--(0,7)--cycle); draw((1,7)--(1,0)); draw((6,7)--(6,0)); draw((5,7)--(5,0)); draw((4,7)--(4,0)); draw((3,7)--(3,0)); draw((2,7)--(2,0)); draw((0,1)--(7,1)); draw((0,2)--(7,2)); draw((0,3)--(7,3)); draw((0,4)--(7,4)); draw((0,5)--(7,5)); draw((0,6)--(7,6)); fill((1,0)--(2,0)--(2,7)--(1,7)--cycle,black); fill((3,0)--(4,0)--(4,7)--(3,7)--cycle,black); fill((5,0)--(6,0)--(6,7)--(5,7)--cycle,black); fill((0,5)--(0,6)--(7,6)--(7,5)--cycle,black); fill((0,3)--(0,4)--(7,4)--(7,3)--cycle,black); fill((0,1)--(0,2)--(7,2)--(7,1)--cycle,black);[/asy]](http://latex.artofproblemsolving.com/b/9/3/b930ac4db49eb7fe094a36707bd316921d9d85db.png)
See Also
| 2009 AMC 8 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 17 |
Followed by Problem 19 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AJHSME/AMC 8 Problems and Solutions | ||
