title: Get nth item from a collection
body: <p>I'm in the learning phase of mongodb.</p>
  
  <p>I have a test website project where each step of a story is a domain.com/step
  for instance, step 14 is accessed through domain.com/14</p>
  
  <p>In other words, for the above case, I will need to access 14th document in my collection to serve it.</p>
  
  <p>I've been using <code>find().skip(n).limit(1)</code> method for this so far to return <code>n</code>th document however it becomes extremely slow when there are too many documents to skip. So I need a more efficient way to get the <code>n</code>th document in my collection.</p>
  
  <p>Any ideas are appreciated.</p>