Final answer:
No magical creature asked Harry a riddle in the third task of the Triwizard Tournament. Possible confusion may arise from other interactive encounters with magical creatures in the Harry Potter series.
Step-by-step explanation:
In the third task of the Triwizard Tournament, no magical creature asked Harry a riddle. The tasks involved Harry facing a variety of challenges, but riddle-asking creatures were not part of the third task specifically. There may be confusion with different moments within the Harry Potter series or with the tasks in the Triwizard Tournament. For example, in 'Harry Potter and the Philosopher's Stone', a magical creature, a Sphinx, asks Harry a riddle during his quest to retrieve the Philosopher's Stone. In the Triwizard Tournament from 'Harry Potter and the Goblet of Fire', Harry faces dragons, merpeople, and an enchanted maze, but not riddles from creatures.