Is there a way to delete questions that you already posted on this forum?

Yes you can but ONLY if you have no answers.

You can only delete them if they have received no answers. Click on 'Edit', and then delete the question.

If your question doesn't have any answers then you can delete it in the Edit menu, but if you have at least one answer then you can't delete it unless it gets reported and removed

You can delete your own unanswered questions via the Edit button

Yes, if they haven't been answered yet. Click Edit and select Delete Question.

You can only delete a question that comes from your account. You can report questions from someone else account by hovering your cursor over the question and your see a flag on the top right of the question. Click on that and report the question. For your own questions: First off if you are using a mobile phone switch to desktop mode. To delete a question with no answers just click on the blue edit button and click on delete question. Once your question has been answered this option is removed and you can not delete the question. The question is now the property of Yahoo. Not much you can do at this point except to make the question anonymous.

Not if they have been answered. Prior to that you can delete them