title: Write a function that takes a list of integers, but only returns those that are NOT multiples of 5
body: <p>Write a function filter_mult5 that takes a list of integers called numbers, and returns another list that contains all the integers in numbers which are not multiples of 5:</p>
  
  <pre><code>def filter_mult5(numbers):
      return #a list of all numbers that are not a multiple of 5
  </code></pre>
  
  <p>For example, <code>filter_mult5([4,6,8,10,12])</code> should return <code>[4,6,8,12]</code></p>