title: Ruby 2.0 - Rounding an integer to the nearest multiple of 10
body: <p>How do i round an integer to the nearest multiple of ten?</p>
  
  <p>I have tried <code>integer.round(0.1)</code> but it gives the nearest <em>decimal</em> number.</p>
  
  <p>Example: 3 should return 0, 55 should return 60.</p>
  
  <p>Is there a method that will round to the nearest multiple of 10?</p>