It is the common most question that is asked in the HR interview. As puzzles are updated from interview to interview, in this playlist, recently asked puzzles are updated with the removal of others. Turn on CC (Closed Captions) for subtitles. For full playlist of Interview puzzles videos : https://www.youtube.com/playlist?list=PL3v9ipJOEEPfI4zt4ExamGJwndkvg0SFc 24 standard interview puzzles: https://www.youtube.com/playlist?list=PL3v9ipJOEEPefIF4nscYOobim1iRBJTjw Aptitude training playlist link : https://www.youtube.com/playlist?list=PL3v9ipJOEEPfumKHa02HWjCfPvGQiPZiG for C and C++ questions, that are asked in the interviews, go through the posts in the link : http://comsciguide.blogspot.com/ for more videos, my youtube channel : https://www.youtube.com/channel/UCvMy2V7gYW7VR2WgyvLj3-A

1. 4 Men in Hats

2. Puzzle Question:
There are 4 people (A,B,C,D) buried upto the neck. They can’t
move and can only look forward. Between A and B, there is a
brick wall. All of them were wearing hats either Black or
White (Total 2 Black & 2 White). In order to avoid from being
shot, one of them has to tell the hat colour, that he is wearing
in 10 min?
• They can’t move, talk, and can see only the front side only.

3. • A and B can’t see the each others, as there is a brick wall
between them. Therefore A and B can’t tell the colour of the
hats.
• And also if B and C wears same colour hat, either white or
black , then D will be able to tell the colour of the hats ( as if B
and C wears white hats, then A and D wears black hats. )
• If C comes to know that D can’t answer , then C will come to
know that B and C are wearing different colour hats. As C able
to see B’s hat, then he can tell the colour of the hat that he is
wearing.