You and your brother have discovered another realm and set off exploring the new wonderful world. Along the way, you see a troll catching creatures in an enormous net. The troll agrees to release the creatures if you can come up with a statement that is both truth and false. Can you come up with the correct sentence and force the troll to release them? Dan Finkel shows how.
Practice more problem-solving at https://brilliant.org/TedEd
Solution to bonus riddle: https://brilliant.org/TedEdTrollParadox
Lesson by Dan Finkel, directed by Artrake Studio.