title: Creating problem-sets with answers in Latex
body: <p>I want to typeset Mathematical problem-sets in Latex. My requirements are as follows:</p>
  
  <p>When I type them in, I want the questions and the answers to be next to each other in the source-code so that fixing errors, etc. can be done easily. </p>
  
  <p><em>However</em>, when the document is typeset, I want the answers to appear in a separate "Answers" section just the way they do in textbooks.</p>
  
  <p>Does anyone know of a way to do this?</p>
  
  <p>Many thanks in advance!</p>