title: Highlight cells that don't have number
body: <p>I was looking to create a true/false formula that is able to view a cell and determine whether it has a number in it (data type is 'Text').</p>
  <p>E.g. Cells</p>
  <p><a href="https://i.stack.imgur.com/npD16.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/npD16.jpg" alt="enter image description here" /></a></p>
  <p>Where as the desired output is:</p>
  <p><a href="https://i.stack.imgur.com/PyXDb.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PyXDb.jpg" alt="enter image description here" /></a></p>
  <p>Note: special characters like &quot;_&quot; or &quot;-&quot; are ignored.</p>
  <p>Thanks for any help!</p>