Anyone really good at using Microsoft Excel???

I have a workbook that has around 3100 lines in it. (3 columns)

I need to be able to delete multiple lines at once. (they aren't blank...)

How do I select multiple lines at once in order to delete them? And no, they aren't consecutive.

For example... I need to delete lines 3,5,9,12,19,31,40,49,50,55,71,99,103,107........ blah blah.

Anyone have an idea?