Can you solve the fortress riddle? - Henri Picciotto
- 708,730 Views
- 909 Questions Answered
- TEDEd Animation
The activity leads to a general formula for the largest impossible number (when it exists) in the case of two “building block” numbers.
Mathematicians know this problem as “the coin problem”. You can read about it here.
Want more puzzles? TED-Ed has lots of fun and challenging brainteasers in our Riddle Series!
Create and share a new lesson based on this one.
More from Can You Solve This Riddle?
lesson duration 05:20