title: dplyr excluding the row start with certain number
body: <p>I have data set like this </p>
  
  <pre><code>df &lt;- data.frame(ID    = c(334, 111, 324, 234), 
                   Name  = c("Tom", "Mike", "John", "Tim"), 
                   Score = c(2, 9, 3, 5))
  </code></pre>
  
  <p>By using dplyr package, how can I exclude ID starting with 3. </p>