title: select the third element in every parent element
body: <p>I need help. How do I select the <code>&lt;p&gt;</code> elements in every <code>&lt;div&gt;</code> on the page (for adding some class) beginning from the third <code>&lt;p&gt;</code> element?</p>
  
  <p>I've tried to select like -   <code>$('div p').slice(1).addClass('hidden');</code>
  but in result only one <code>&lt;p&gt;</code> element remains on the page</p>