How long is a Paris metro ticket good for?

Related questions

1. How do you pay for Metro in Paris?
2. How much is a metro ticket in Paris?
3. Is Paris Metro underground?
4. Does Paris Pass include Metro?
5. How do you get to Versailles from Paris?
6. How late is Paris Metro open?
7. How much does it cost to go up the Eiffel Tower?
8. Which metro stations are closed today?
9. What time does Metro stop?
10. How much is dinner in Paris?

Tags

1. #allows
2. #metro
3. #validation
4. #first
5. #minutes
6. #networks
7. #after
8. #transfers
9. #hours
10. #validated
11. #ticket
12. #between
13. #valid