| Other Puzzles Interview Questions |
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| Question | Asked @ | Answers |
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| Somebody marked the six faces of a die with the numbers 1, 2
and 3 - each number twice. The die was put on a table. Four
people - Abu, Babu, Calu and Dabu - sat around the table so
that each one was able to see only three sides of the die at
a glance.
? Abu sees the number 1 and two even numbers.
? Babu and Calu can see three different numbers each.
? Dabu sees number 2 twice and he can't remember the third
number.
What number is face down on the table? | | 1 |
| Find the smallest number such that if its rightmost digit
is placed at its left end, the new number so formed is
precisely 50% larger than the original number. | CTS | 2 |
| Everyday in his business a merchant had to weigh amounts
from 1 kg to 121 kgs, to the nearest kg. What are the
minimum number of different weights required and how heavy
should they be? | | 2 |
| A cow is standing 5 feet from the middle of the bridge .A
train is at a distance of 2 times length of the bridge from
direction in which cow is nearer to end of the bridge is
coming at a speed of 90 miles/hour.If cow moves towards
train it will be saved by 1 foot.If cow moves away from
train it will be hit by three inches of cow
(i)Find length of bridge
(ii)Find cows speed
| Infosys | 1 |
| There is a perfect sphere of diameter 40 cms. resting up
against a perfectly straight wall and a perfectly straight
floor i.e. the wall and the floor make a perfect right angle.
Can a perfect sphere of diameter 7 cms. pass through the
space between the big sphere, the wall and the floor?
Support your answer with valid arguments. Don't submit just
"Yes" or "No". | | 3 |
| At what time after 4.00 p.m. is the minutes hand of a clock
exactly aligned with the hour hand? | HP | 5 |
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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 |
| Pinto says, "The horse is not Black."
Sandy says, "The horse is either Brown or Grey."
Andy says, "The horse is Brown."
At least one is telling truth and at least one is lying.
Can you tell the color of the horse? | | 2 |
| ? A is the father of two children - B and D who are of
different sexes.
? C is B's spouse.
? E is the same sex as D.
? B and C have the two children - F who is the same sex as B
and G who is the same sex as C.
? E's mother, H who is married to L, is the sister of D's
mother, M.
? E and E's spouse, I have two children - J and K who are
the same sex as I.
Note that no persons have married more than once. Also,
there are more number of females than males. Can you tell
how many females are there? | | 3 |
| Sam and Mala have a conversation.
? Sam says I am certainly not over 40
? Mala says I am 38 and you are atleast 5 years older than me
? Now Sam says you are atleast 39
All the statements by the two are false. How old are they
really? | | 1 |
| Consider a state lottery where you get to choose 8 numbers
from 1 to 80, no repetition allowed. The Lottery Commission
chooses 11 from those 80 numbers, again no repetition. You
win the lottery if at least 7 of your numbers are there in
the 11 chosen by the Lottery Commission.
What is the probability of winning the lottery? | | 1 |
| On the shelf you have 10 identical bottles of identical
pills (let?s say there?s a hundred pills in each bottle).
However, one of those 10 bottles contains cheap knockoff
pills. The only way to differentiate fake pills from real
pills is the weight - while real pills weigh 1 g each, the
knockoff pills are only 0.9 g. You have one scale that
shows the exact weight (down to the mg) of whatever is
weighed.
How can you tell which bottle contains fake pills with just
1 weighing?
| TCS | 5 |
| Five students - Akash, Chintan, Jignesh, Mukund and Venky -
appeared for an exam. There were total five questions - two
multiple choice (a, b or c) and three true/false questions.
They answered five questions each and answered as follow.
I II III IV V
--------------------------------------------------
Chintan c b True True False
Akash c c True True True
Jignesh a c False True True
Mukund b a True True False
Venky b b True False True
--------------------------------------------------
Also, no two students got the same number of correct answers.
Can you tell which are the correct answers? What are their
individual score? | | 1 |
| 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 |
| Mrs. Watsherface had a garage sale. A custmer named Gina
bought an old lamp and a rug. She paid a total of $5.25 for
everything. The rug cost 25 cents more than the lamp.
How much did each cost? | | 1 |
| Two people enter a race in whick you run to a point and
back. Person A runs 20 mph to and from the point. Person B
runs to the point going 10 mph and 30 mph going back.
Who came in first? | | 2 |
| 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 |
| Assume for a moment that the earth is a perfectly uniform
sphere of radius 6400 km. Suppose a thread equal to the
length of the circumference of the earth was placed along
the equator, and drawn to a tight fit.
Now suppose that the length of the thread is increased by 12
cm, and that it is pulled away uniformly in all directions.
By how many cm. will the thread be separated from the
earth's surface? | | 3 |
| At a recent painting competition,Jonny's rendition of a
constable was not last.priya only just managed to avoid last
place and came third.the lady who paintd a monkey was very
successfull and took first place>Mary beat the lady who
painted the lady the temple and the lady who painted the
flower beat saching.can you determine who painted what and
who won | QA | 2 |
| A polygon has 1325 diagonals. How many vertices does it have? | | 1 |
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