| Other Puzzles Interview Questions |
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| Question | Asked @ | Answers |
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| There are 25 horses and only five tracks in a race.
How do you find the second coming horse of all the 25
horses, provided there is no stop clock? (obviously, a
horse cannot participate more than once in a race). | Juniper-Networks | 5 |
| Consider a number 235, where last digit is the sum of first
two digits i.e. 2 + 3 = 5.
How many such 3-digit numbers are there?
| | 3 |
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Brain Teaser No
Three Gold (G) coins, three Silver (S) coins and three
Copper (C) coins are arranged in a single row as follow:
G S C G S C G S C
? Only 2 adjacent unlike coins can be moved at any one time.
? The moved coins must be in contact with at least one other
coin in line. i.e. no pair of coins is to be moved and
placed away from the remaining ones.
? No coin pairs can be reversed i.e. a S-C combination must
remain in that order in its new positionwhen it is moved.
What is the minimum number of moves required to get all the
coins in following order?
C C C S S S G G G
Show all moves. | | 1 |
| I bought a car with a peculiar 5 digit numbered licence
plate which on reversing could still be read. On reversing
value is increased by 78633.
Whats the original number if all digits are different? | | 2 |
| A contractor had employed 100 labourers for a flyover
construction task. He did not allow any woman to work
without her husband. Also, atleast half the men working came
with their wives.
He paid five rupees per day to each man, four ruppes to each
woman and one rupee to each child. He gave out 200 rupees
every evening.
How many men, women and children were working with the
constructor? | | 2 |
| At University of Probability, there are 375 freshmen, 293
sophomores, 187 juniors, & 126 seniors. One student will
randomly be chosen to receive an award.
What percent chance is there that it will be a junior? Round
to the nearest whole percent | | 1 |
| 1/3 rd of the contents of a container evaporated on the 1st
day. 3/4th of the remaining contents of the container
evaporated on the second day.
What part of the contents of the container is left at the
end of the second day? | | 1 |
| 4. There are five caps , 3 black and 2 white. three
persons chander, sunder and maninder are standing one
behind the other in a queue. the first person in the queue
is chanbder and the last person is maninder . 3 caps
rfrom the lot of fivce is taken and put on their
heads. Maninder can see what the other two standing
in front are wearing . sunder can see what chander is
wearing. None of them can turn around and see what the
person standing behind is wearing , they do not know the
color of cap what they themselves are wearing . John comes
and asks maninder,"what is the color of the cap your
are wearing?", Maninder can see what sunder and chander
are wearing, and based on that he says he doesn't know.
sunder has over heard that answer. Now john asks
sunder" what is the colour of the cap you are wearing".
sunder can see chander and he has heard what maninder
has said, and based on that he says he doesn't know.
chander has overheard both sunder and maninder. so when
john asks chander the same question, he tells the
correct answer.
What is the colour of the cap that chander is weaRing ?
Please write in brief how did you reach to that
conclusion. | | 4 |
| What is the area of the triangle ABC with A(e,p) B(2e,3p)
and C(3e,5p)?
where p = PI (3.141592654) | | 1 |
| Three convicts are brought into the warden's office. He says
he can parole one of them and to decide which one he will
parole he takes out 5 hats (3 red and 2 white). He stands
behind them and places a hat on each one of their heads and
puts the other two remaining hats in a drawer.
He tells the prisioners they can look at the others hats and
if they can tell which hat they have on they will be the one
who is paroled.
The first man looks at the other two and says, "I don't know."
The second man looks at the others hats and says, "I don't
know."
The third man who is blind says, "Even though I have not the
gift of sight I can tell by what the others have said that
the color of my hat is..."
What color is the blind mans hat and how does he know? | Bally-Technologies | 2 |
| A 3 digit number is such that it's unit digit is equal to
the product of the other two digits which are prime. Also,
the difference between it's reverse and itself is 396.
What is the sum of the three digits? | | 1 |
| The secret agent X emailed some code to his head office.
They are "RADAR, LEVEL, ROTOR, REDIVIDER, MOTOR". But four
of these five words have something in common and one is fake.
Can you tell which one is fake? Ignore the fact that four of
the code-words are of the same length. | | 2 |
| Four persons A, B, C and D are playing cards.Each person
has one card, laid down on the table below him, which has
two different colours on either side. The colours visible
on the table are Red, Green, Red and Blue. They see the
color on the reverse side and give the following | Infosys | 4 |
| An anthropologist discovers an isolated tribe whose written
alphabet contains only six letters (call the letters A, B,
C, D, E and F). The tribe has a taboo against using the same
letter twice in the same word. It's never done.
If each different sequence of letters constitues a different
word in the language, what is the maximum number of
six-letter words that the language can employ? | | 1 |
| Implement a multiple-reader-single-writer lock given a
compare-and-swap instruction. Readers cannot overtake
waiting writers. | | 1 |
| On evey Sunday Amar, Akbar and Anthony lunch together at
Preetam-Da-Dhaba where they order lassi based on following
facts.
1. Unless neither Amar nor Akbar have lassi, Anthony must
have it.
2. If Amar does not have lassi, either Akbar or Anthony or
both have it.
3. Anthony has lassi only if either Amar or Akbar or both
have it.
4. Akbar and Anthony never have lassi together.
Who order(s) lassi? | | 1 |
| You have 14 apples. Your Friend Marge takes away 3 and gives
you 2. You drop 7 but pick up 4. Bret takes 4 and gives 5.
You take one from Marge and give it to Bret in exchange for
3 more. You give those 3 to Marge and she gives you an apple
and an orange. Frank comes and takes the apple Marge gave
you and gives you a pear. You give the pear to Bret in
exchange for an apple. Frank then takes an apple from Marge,
gives it to Bret for an orange, gives you the orange for an
apple.
How many pears do you have? | | 2 |
| 3 blocks are chosen randomly on a chessboard. What is the
probability that they are in the same diagonal? | | 1 |
| In a sports contest there were m medals awarded on n
successive days (n > 1).
1. On the first day 1 medal and 1/7 of the remaining m - 1
medals were awarded.
2. On the second day 2 medals and 1/7 of the now remaining
medals was awarded; and so on.
3. On the nth and last day, the remaining n medals were awarded.
How many days did the contest last, and how many medals were
awarded altogether? | | 1 |
| You have 3 points labelled A, B and C. You then have another
3 points labelled 1, 2 and 3. The aim of the puzzle is to
connect point A with point 1, 2 and 3. Point B with point 1,
2 and 3 and point C with point 1, 2 and 3.
Now while connecting the points you have to follow one rule
- the lines cannot cross over each other. | | 1 |
| |
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