Interesting Interview Questions
This page lists interesting interview questions that have been told to me
by colleagues, family, and friends.
If you have any more interesting
interview questions, please let me know!
THREE PEOPLE, 2 BLACK HATS, AND 3 WHITE HATS
There are 3 people (A, B, and C). They varying in height such
that person C is shorter than person B, and person B is shorter than person
A. They all stand facing the same direction, from tallest (A) to shortest (C).
In this position, person A can see the top of the heads of person B and C;
person B can see the top of the head of person A only, and person A can
not see the top of anyone's head. On the top of the heads of each person
is placed a hat of either black or white color. The hats which are placed on
each person's head are selected at random from a pile of 2 black hats and
3 white hats. The remaining unused hats are not visible to the 3 people. Each
person cannot see the color of his own hat either, only the colors of the
hats of the people directly in front of him. Each of the 3 people is
instructed to tell the other 2 people if he knows the color of his own
hat (he does not tell them what color his hat is though). After a sufficient
amount of time, no one says anything, indicating no one knows the color of
the hat on top of his head. At this point, person C (the shortest person)
announces happily that he knows what color hat is on top of his head!
How can this be?! And what color is the hat on person C's head?
--- submitted by Anonymous (she was a bit shy so didn't want her name up!)
Last updated: 040201