Can you solve the frog riddle? - Derek Abbott - YouTube
Can you solve the penniless pilgrim riddle? - Daniel Finkel - YouTube
Can you solve the dark coin riddle? - Lisa Winer | TED-Ed
TED Talks on Twitter: "The first person to solve this puzzle gets a bird GIF from us! Daily puzzles all week, created by @davidkwong. #TED2017 #TEDPuzzleHunt… https://t.co/SRN2pbItZI"
6 of The Best TED Ed Riddles to Use with Students in Class | Educational Technology and Mobile Learning
Can you solve the temple riddle? - Dennis E. Shasha - YouTube
Uživatel TED-Ed na Twitteru: „This riddle has been called the hardest logic puzzle ever. Let's give it a shot: https://t.co/Y7tEw2ZBm9… “
Can you solve the prisoner hat riddle? - Alex Gendler | TED-Ed
5th Grade Math Puzzles : Ted Warner : 9781981074426