title: formula for integer less than 15
body: <p>In one field I want to accept numbers that could be decimal figure for weight but it should not be over 15. Previously I had the following regex code:</p>
  
  <pre><code>[1-9]\d*(\.\d+)?$
  </code></pre>
  
  <p>This is to be entered in Google Forms. In other words, all these numbers are OK:
  0.05
  1.5
  2
  3.56</p>
  
  <p>But these are not ok:
  2 kg
  0
  15.1
  16</p>