TED-Ed: Can you solve the Ragnarok riddle? | Dan Finkel

The video tutorial narrates a battle between Norse gods and the Great Serpent Yorman Gundur. Odin devises a plan to defeat the serpent using a final lightning bolt, magnified by a hammer. The tutorial explains how to simplify the problem using graph theory, focusing on nodes and edges to find an Eulerian path. This path ensures every edge is traversed once, crucial for defeating the serpent. The video concludes with executing the plan to save Valhalla.

What is the main challenge faced by the Norse gods in their battle against the Great Serpent?

• The serpent's invisibility

• The serpent's continuous body with no head or tail

• The serpent's ability to fly

• The serpent's fire-breathing ability

What is the key strategy to destroy the serpent according to the video?

• Running along the serpent's body without retracing steps

• Running in circles around the serpent

• Flying above the serpent and dropping bombs

• Digging tunnels under the serpent

In graph theory, what do the intersections and stretches of the serpent's body represent?

• Vertices and angles

• Circles and squares

• Nodes and edges

• Points and lines

What is an Eulerian path?

• A path that avoids all intersections

• A path that starts and ends at the same node

• A path that traces every edge exactly once

• A path that visits every node exactly once

What condition must be met for a network to contain an Eulerian path?

• No nodes should have any edges

• All nodes must have an odd number of edges

• All nodes must have an even number of edges

• Exactly two nodes must have an odd number of edges