Dragon Ball Z Episode 174: The Puzzle of General Tao
Episode 174 of 291 of Dragon Ball Z, aired February 10, 1993, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Goku comes face to face with an old adversary, General Tao! Goku's search for the Dragon Balls has led him to the aging general, but unless the Super Saiyan can solve the crafty villain's puzzle, that search just might come to an end!