Difference between revisions of "2024 AMC 8 Problems/Problem 7"

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==Problem==
 
==Problem==
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A <math>3x7</math> rectangle is covered without overlap by 3 shapes of tiles: <math>2x2</math>, <math>1x4</math>, and <math>1x1</math>, shown below. What is the minimum possible number of <math>1x1 tiles used?
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</math>\textbf{(A) } 1\qquad\textbf{(B) } 2\qquad\textbf{(C) } 3\qquad\textbf{(D) } 4\qquad\textbf{(E) } 5<math>
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==Solution 1==
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We can eliminate B, C, and D, because they are not </math>21 - any multiple of 4<math>. Next, we see that there is no way to have A, so the solution is </math>(E) \boxed{5}$.
  
 
==Solution 1==
 
==Solution 1==

Revision as of 16:06, 25 January 2024

Problem

A $3x7$ rectangle is covered without overlap by 3 shapes of tiles: $2x2$, $1x4$, and $1x1$, shown below. What is the minimum possible number of $1x1 tiles used?$\textbf{(A) } 1\qquad\textbf{(B) } 2\qquad\textbf{(C) } 3\qquad\textbf{(D) } 4\qquad\textbf{(E) } 5$==Solution 1==

We can eliminate B, C, and D, because they are not$ (Error compiling LaTeX. Unknown error_msg)21 - any multiple of 4$. Next, we see that there is no way to have A, so the solution is$(E) \boxed{5}$.

Solution 1

Video Solution 1(easy to digest) by Power Solve

https://youtu.be/16YYti_pDUg?si=KjRhUdCOAx10kgiW&t=59