Search for Number of Hours before the Case Is Set to Closed

Solution:

1. Navigate to List> Search> Saved Searches> New> Case
2. Under Criteria subtab > Standard sublist, add the following:
   Stage = Closed         
3. In the Results tab, add the following:
   Field = Number
   Field = Date Created
   Field = Date Closed 
   Field = Formula Numeric || Formula Column = ROUND(({closed}-{createddate})*24,2)
4. Enter Search Title 
5. Click Save & Run button