Naruto Episode 24
As everyone takes their seat, Ibiki explains that the the first phase of the exam will be a written test. Cheating results in the deduction of points, which in turn eventually leads to that person and their team being ejected. Everyone present realizes that cheating is necessary to pass the test, and many are ejected for cheating, while others use their unique abilities to successfully cheat. Naruto, unable to answer any of the questions, puts all his faith in the final question, which will be given fifteen minutes before the test’s end.
Source: Wikipedia
Naruto Episode 24 – Start Your Engines: The Chunin Exam Begins
