You can play it again whenever you like, but you won't get points for playing it again.
If it happens to be a Quiz of the Hour or on the Bus Ride, you get the points for that activity, not for the actual quiz. If you are allocated a Daily Task that specifies you can replay quizzes that haven't been played within the last 30 days, then you cannot meet the challenge if it has been played more recently. If you are on a scavenger hunt, and don't score highly enough the first time you take the quiz, you have to wait 24 hours and then replay it using the appropriate replay link.
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(Editor in Humanities, Religion, Literature and For Children)
That's all, folks!