A quick teaser: Imagine you are one of 120 people in a room. Each person in the room is given two lengths of rope and told to chose two of his or her four rope-ends at random and to tie them together. Then each person is told to tie the remaining two rope-ends together.
Then, we count up the loops of rope. How many should there be?
SOLUTION: [Read more…] about Brain Teaser: Making Ends Meet