I'll do one when possible. It's two pages, but irrelevant to this.
Also, there's no limit of entries when it comes to the Graduation Exam. We don't know how Naruto was allowed to attempt them, but it's possible that he was given permission to do it, even with his grades, because of hopes he'd quit sooner if he did that.
Of course, if Naruto *passed* those exams, even with shitty skills, he'd probably fail the Genin exam because, until he learned Kage Bunshin, he wasn't really good at anything but Henge.