Brain Teasers
Dellzup
Harry was on holiday last year on the island of Dellzup. Dellzup has a really peculiar shape for an island. It's rectangular, 20 miles long and only 15 feet wide, and is totally covered in trees! It has two tiny villages on it, Start and End. Unfortunately, a fire has begun at Start and is travelling toward End at around 1 mile per hour. There is also a wind which is blowing towards End at around 2 miles per hour. Now Harry, who is at End, has no way of getting off the island: he cannot pass through the fire, he cannot put the fire out, and there is no one to help him. How can he save himself?
Answer
The simplest method is to light a new fire about 1 mile from End. This fire will burn toward End (because of the wind) and when it reaches End, it will go out. Harry can then go to End, knowing that the main fire cannot reach him as his smaller fire has already burned all of the trees down.Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments hidden to avoid spoilers.
Follow Braingle!