top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

How many days will it take to blue-eyed people to leave?

+1 vote
237 views

A bunch of people are living on an island, when a visitor comes with a strange order : all the blue-eyed people must leave the island as soon as possible. There will be a flight out at 8 PM every evening. Each person can see everyone else’s eye color, but they do not their own(nor is anyone allowed to tell them). Additionally they do not know how many people have blue eyes, although they do know that at least one person does. How many days will it take to blue-eyed people to leave?

posted Jul 20, 2017 by Debaprasad Maity

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

jntrivedi58@gmail.com

100 blue eye ppl wil leave in 200 days.

answer Jul 23, 2020 by J N Trivedi



Similar Puzzles
0 votes
How many moves will it take to reach the door ?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door.

0 votes
How many people leave the island and in how many days after the announcement?

There is an island with exactly 201 residents, 100 with blue eyes, 100 with brown eyes, and the island leader (who has green eyes). To leave the island, one must know their own eye color. There are no reflective surfaces on the island and no on can communicate with each other other than the leader to the residents. No one on the island knows how many of each eye color there is. Everyone on the island is a perfect logician, meaning that if there us a solution they'll find it. Every morning the leader gives anyone a chance to leave the island by guessing their eye color. One morning, the leader gathers all 200 residents to make an announcement, he says "at least 1 person on this island has blue eyes".
How many people leave the island and in how many days after the announcement?

0 votes
How many days will 27 men and 18 women take to do it?

If 17 men and 18 women can do a piece of work in 11 days and 14 men and 13 women can do it in 15 days.
How many days will 27 men and 18 women take to do it?

0 votes
How many days will it now take for the Magic Grass to cover his garden?

At a plant nursery they’re selling Magic Grass, a patch of sod that doubles in size every day.

Mohit goes to buy some and figures that his garden is big enough that if he buys one patch, it will cover his garden in 14 days, because each day it doubles in size.

So he decides to speed up the process, and buys two patches of sods.

How many days will it now take for the Magic Grass to cover his garden?

+1 vote
How many days will it take the snail to get out of the tunnel?

A tunnel is 12metres deep and a snail is at the bottom of the tunnel.
Everyday, it climbs a height of 600cm but at night,
it slides down a depth of 400cm.
How many days will it take the snail to get out of the tunnel?

...