Thank you for the assistance

here is what I have come up with ...what do you think

1. Copy data to a new sheet and remove unneeded columns
2. Create a helper column and insert this code in the first cell of the helper column.
3. =(Mod(Minute(cell#), xx)) where "xx" = the number of minutes to filter by eg.. 5 or 10 or ….
4. Copy the formula down to the last row
5. Select all of the data rows
6. Select filter from the data menu
7. From the drop down arrows on the helper column select number filters > does not equal
8. In the box next to the "does not equal" enter “0” and select OK
9. Right click in the middle of the data and select delete rows.
10. You will now be left with only the rows containing the minutes selected.