We are 4 adults and would be in Paris for 3 days. We would like to purchase metro day passes that we can use to get to the hotel and central paris. It looks like the day pass doesn't work in zone 5. Any help would be greatly appreciated? We all have EUrail passes but would prefer not to use it on first day.
If you arrive before Thursday midnight, your best option is always the Navigo Decouverte.
If you arrive Friday morning through Sunday, then the best option depends entirely on where you visit. If you're making trips out of central Paris during your stay then a Paris Visite 5-zone (for however many days you need) is likely the easiest option.
If you plan on staying purely within the bounds of central Paris (no Versailles, no Disneyland / Fontainebleau) a Paris Visite 3-zone will suffice along with single-use RER tickets to get from CDG airport and back (single-use tickets can be bought one day and used anytime in the future).