A blindfolded man is asked to sit in the front of a carrom
board. The holes of the board are shut with lids in random
order, i.e. any number of all the four holes can be shut or
open.
Now the man is supposed to touch any two holes at a time and
can do the following.
? Open the closed hole.
? Close the open hole.
? Let the hole be as it is.
After he has done it, the carrom board is rotated and again
brought to some position. The man is again not aware of what
are the holes which are open or closed.
How many minimum number of turns does the blindfolded man
require to either open all the holes or close all the holes?
Note that whenever all the holes are either open or close,
there will be an alarm so that the blindfolded man will know
that he has won.
- 4 Answers
- 11590 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / guest
The blindfolded man requires 5 turns.
1. Open two adjacent holes.
2. Open two diagonal holes. Now atleast 3 holes are open. If
4th hole is also open, then you are done. If not, the 4th
hole is close.
3. Check two diagonal holes.
o If one is close, open it and all the holes are open.
o If both are close, open any one hole. Now, two holes are
open and two are close. The diagonal holes are in the
opposite status i.e. in both the diagonals, one hole is open
and one is close.
4. Check any two adjacent holes.
o If both are open, close both of them. Now, all holes are
close.
o If both are close, open both of them. Now, all holes are
open.
o If one is open and one is close, invert them i.e. close
the open hole and open the close hole. Now, the diagonal
holes are in the same status i.e. two holes in one diagonal
are open and in other are close.
5. Check any two diagonal holes.
o If both are open, close both of them. Now, all holes are
close.
o If both are close, open both of them. Now, all holes are open.
| Is This Answer Correct ? | 8 Yes | 3 No |
Answer / shakti
A little correction !
It would be
3. Check two diagonal holes.
o If one is close, open it and all the holes are open.
o If both are open, close any one hole. Now, two holes are
open and two are close. The diagonal holes are in the
opposite status i.e. in both the diagonals, one hole is open
and one is close.
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / puzzzzz....
i couldn't understand the above soln. Will someone please
explain the soln. in simple and clear words
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / eveline
Hello
My name is eveline i saw your profile today at
www.allinterview.com and i love it also became intrested in
you,i will also like to know you more,and i want you to send
an email directely to my email address so i can give you my
picture for you to know whom i am.Here is my email
address(eveline.mbia@yahoo.com) i believe we can move from
here.my love distance or colour does not matter but love
matters alot in life.i waiting to recive your lovely reply
soon, Yours Love.
Miss Eveline.
| Is This Answer Correct ? | 1 Yes | 1 No |
In Mr. Mehta's family, there are one grandfather, one grandmother, two fathers, two mothers, one father-in-law, one mother-in-law, four children, three grandchildren, one brother, two sisters, two sons, two daughters and one daughter-in-law. How many members are there in Mr. Mehta's family? Give minimal possible answer.
During a recent school reunion,four men were discussing their starting salaries back in 1962.The salaries in question were 8,10,12 and 14 thousand pounds per year.of course the MP earned the most.Alan earned more thean brain and the doctor earnd more than Derek,the vet.charles could not remember what he started on.Brain,the lawyer,didnot start on 10,000pounds nor did Derek.can you determine who has which job and their starting salaries?
Four couples are going to the movie. Each row holds eight seats. Betty and Jim don't want to sit next to Alice and Tom. Alice and Tom don't want to sit next to Gertrude and Bill. On the otherhand, Sally and Bob don't want to sit next to Betty and Jim. How can the couples arrange themselves in a row so that they all sit where they would like?
a is person take 10 days to do a work, b is a person take 15 days to do same work, if both do the work how many days will they take
X is a five letter word.X is a talent in u.if u remove 1st letter X is dead. if u remove 1st 2 letters x is sick.what is X?
If A,B,C,D,E r 5 members of a family.4 of them give true statements : 1. E is my mother in law 2. C is my son in law's brother 3. B is my father's brother 4. A is my brother's wife Who made the stmt. and what r the realtions among them Ans. E
Assume that you have just heard of a scandal and you are the first one to know. You pass it on to four person in a matter of 30 minutes. Each of these four in turn passes it to four other persons in the next 30 minutes and so on. How long it will take for everybody in the World to get to know the scandal?
A B C D E F G H I Each of the digits from 1 to 9 is represented by a different letter above. Also, A + B + C = C + D + E = E + F + G = G + H + I = 13 Which digit does E represent?
how many coins do i have in my pocket
One of the four people - Mr. Clinton, his wife Monika, their son Mandy and their daughter Cindy - is a singer and another is a dancer. Mr. Clinton is older than his wife and Mady is older than his sister. 1. If the singer and the dancer are the same sex, then the dancer is older than the singer. 2. If neither the singer nor the dancer is the parent of the other, then the singer is older than the dancer. 3. If the singer is a man, then the singer and the dancer are the same age. 4. If the singer and the dancer are of opposite sex then the man is older than the woman. 5. If the dancer is a woman, then the dancer is older than the singer. Whose occupation do you know? And what is his/her occupation?
what makes a road as abroad?
A fish had a tail as long as its head plus a quarter the lenght of its body. Its body was three-quarters of its total length. Its head was 4 inches long. What was the length of the fish?
English 
