MathDB
Cindy's Teacher's Request

Source:

February 11, 2008

Problem Statement

Cindy was asked by her teacher to subtract 3 3 from a certain number and then divide the result by 9 9. Instead, she subtracted 9 9 and then divided the result by 3 3, giving an answer of 43 43. What would her answer have been had she worked the problem correctly? <spanclass=latexbold>(A)</span> 15<spanclass=latexbold>(B)</span> 34<spanclass=latexbold>(C)</span> 43<spanclass=latexbold>(D)</span> 51<spanclass=latexbold>(E)</span> 138 <span class='latex-bold'>(A)</span>\ 15 \qquad <span class='latex-bold'>(B)</span>\ 34 \qquad <span class='latex-bold'>(C)</span>\ 43 \qquad <span class='latex-bold'>(D)</span>\ 51 \qquad <span class='latex-bold'>(E)</span>\ 138