How to compare numeric data

Lets say I have the data of the employees

Name | Designation | Age

Now I want to filter the data of those employees who are above 25. I couldn't do it.

This is how I tried it but it is giving me blank result :(

print tablemanager_display(2, NULL, FALSE, array('column' => 3, 'start' =>"25", 'end' =>"100"));