Scripting Help : Trivia box

Hi everyone,
I am trying to make an "information hunt" on a sim for my college. I have the easter egg all made I just need to add one piece to it.

How would I go about adding a timer so if someone answered a question wrong they would have to way 2-5 minutes before being able to touch the prim and answer again?

Any help is greatly appreciated.

Thanks,
Nikolas

Use a second script to keep track of anyoen who is 'banned'
When they answer a question wrong post the key from the primary script to the secondary. This script would add them to a 'banned' list along with a timestamp.
It would then periodically check the list and delete any time expired keys.

meanwhile anyone touching the prim would first be validated against the 'banned' list before being allowed to play.