TED-Ed: Can you solve the bridge riddle? - Alex Gendler

In a remote mountain lab, a group must escape mutant zombies by crossing a rope bridge. The group includes a janitor, lab assistant, and professor, each with different crossing speeds. The bridge holds two people at a time, and a lantern is needed to see. The solution involves strategic crossings to ensure everyone escapes before zombies arrive. The fastest return with the lantern, allowing the slowest to cross together, optimizing time. The plan succeeds just in time, highlighting the importance of strategic planning.

What is the main objective of the group in the zombie escape scenario?

• To negotiate with the zombies for safe passage

• To find a cure for the zombie virus

• To escape across a rope bridge before the zombies catch up

• To destroy the lab to prevent further outbreaks

What is the maximum number of people that can cross the bridge at the same time?

• One person

• Two people

• Four people

• Three people

Why is the lantern crucial for crossing the bridge?

• It is needed to cut the ropes

• It is used to signal for help

• It provides light in the dark

• It scares away the zombies

Which two people should cross the bridge together to minimize time wasted?

• The janitor and the lab assistant

• The narrator and the professor

• The narrator and the janitor

• The professor and the janitor

What is the final action taken to ensure the zombies cannot follow?

• The zombies are distracted with a noise

• The bridge is collapsed by cutting the ropes

• The group hides on the other side

• The group uses a boat to escape further