Naruto Episode 25: The Tenth Question: All or Nothing!
Episode 25 of 220 of Naruto, aired March 27, 2003, 25 minutes. Available with English subtitles and dub where released.
Episode summary
As time ticks away, Naruto's only hope of passing the test lies in the final question. However, there is a requirement to answering the final question. If you choose not to answer it, you fail the test and can try again next time. But, if you choose to answer it and get it wrong, you can never take the test again and must stay a Genin forever! What will Naruto's choice be?