What does the title "24" mean?!

Question: What does the title "24" mean!?
Answers:

24 hours each series is 24 hours in the life of jack bauerWww@Enter-QA@Com

that the show is supposed to take place in a 24 hour period!. dont watch it but thats what its supposed to beWww@Enter-QA@Com

24 one hour episodes= a day in the life of jack bauerWww@Enter-QA@Com

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