MathDB
Error in a Check

Source:

June 13, 2009

Problem Statement

A check is written for x x dollars and y y cents, x x and y y both two-digit numbers. In error it is cashed for y y dollars and x x cents, the incorrect amount exceeding the correct amount by $17.82 \$17.82. Then: <spanclass=latexbold>(A)</span> x cannot exceed 70<spanclass=latexbold>(B)</span> y can equal 2x<spanclass=latexbold>(C)</span> the amount of the check cannot be a multiple of 5<spanclass=latexbold>(D)</span> the incorrect amount can equal twice the correct amount<spanclass=latexbold>(E)</span> the sum of the digits of the correct amount is divisible by 9 <span class='latex-bold'>(A)</span>\ {x}\text{ cannot exceed }{70}\qquad \\ <span class='latex-bold'>(B)</span>\ {y}\text{ can equal }{2x}\qquad\\ <span class='latex-bold'>(C)</span>\ \text{the amount of the check cannot be a multiple of }{5}\qquad \\ <span class='latex-bold'>(D)</span>\ \text{the incorrect amount can equal twice the correct amount}\qquad \\ <span class='latex-bold'>(E)</span>\ \text{the sum of the digits of the correct amount is divisible by }{9}