Hi Lorna, we're usually checking and approving questions multiple times a day, so it shouldn't take too long for your questions to appear if they are approved.
If they're not up by now, they most likely were not approved. This usually happens because the question has already been asked.
If you do see questions that have already been asked when answering trivia questions, you can go ahead and report it as a duplicate and it will be deleted. In the mean time, feel free to submit more trivia. :-)