Practice more problem-solving at https://brilliant.org/TedEd/ Solution to the bonus riddle mentioned at the end: https://brilliant.org/tededcoinflip You heard the travelers’ tales, you followed the maps, and now, you’ve finally located the dungeon containing a stash of ancient coins. The good news: the wizard who owns the castle has generously agreed to let you have the coins. The bad news: he’s not quite as generous about letting you leave the dungeon ... unless you solve his puzzle. Can you solve it and get out alive? Lisa Winer shows how. Lesson by Lisa Winer, animation by Artrake Studio. Thank you so much to our patrons for supporting us on Patreon! Without you this video would not be possible! سلطان الخليفي, Marylise CHAUFFETON, Marvin Vizuett, Jayant Sahewal, Joshua Plant, Quinn Shen, Caleb ross, Elizabeth Cruz, Elnathan Joshua Bangayan, Gaurav Rana, Mullaiarasu Sundaramurthy, Jose Henrique Leopoldo e Silva, Dan Paterniti, Jose Schroeder, Jerome Froelich, Tyler Yoshizumi, Martin Stephen, Faiza Imtiaz, Khalifa Alhulail, Tejas Dc, Govind Shukla, Benjamin & Shannon Pinder, Srikote Naewchampa, Ex Foedus, Sage Curie, Exal Enrique Cisneros Tuch, Ana Maria, Vignan Velivela, Ibel Wong, Ahmad Hyari, A Hundred Years, eden sher, Travis Wehrman, Minh Tran, Louisa Lee, Kiara Taylor, and Hoang Viet.