Have a listbox randomly pick to remove either the odd numbers or the even numbers

Hi there folks. I got this math game to help show students the difference between odd numbers and even numbers between 1-25, but I was wondering if there was a way for vb6 to remove either all the odd numbers, or all the even numbers from a list box called numlist.
But the trick is I would like the program to do it randomly, choose either even or odds.

Now I can have the listbox remove them by going

numlist.removeitem - the position of the number, as they are all in order from 1-25., but I'm stuck on trying to get it to pick at random either odds or evens. Has anyone ever done something like that before?

THanks!