infy puzzles part1

Infosys Puzzles

1.There is a escalator and 2 persons move down it.A takes 50 steps and B takes 75 steps

while the escalator is moving down. Given that the time taken by A to take 1 step is equal to

time taken by B to take 3 steps. Find the no. of steps in the escalator while it is staionary.

Solution (not sure):

If A takes 1 step in one second, then B takes 3 steps in one second. If A takes t1 seconds to

take 50 steps, then B takes 150 steps in t1 seconds.

For B, to take 150 steps he requires t1 seconds,

then to take 75 steps he requires t1/2 seconds.

So now, s1=50, t1 = t1 & s2=75, t2=t1/2

ans= (s1*t2 ~ s2*t1) / (t1 ~ t2) which gives 100.

so 100 steps is the answer

2. If 5/2 artists make 5/2 paintings using 5/2 canvases in 5/2 days then how many artists r

required to make 25 paintings using 25 canvases in 25 days?

3. If the digits of my present age are reversed then i get the age of my son.If 1 year ago my

age was twice as that of my son.Find my present age.

ans. father-73, son-37

4. There are 6561 balls out of them 1 is heavy.Find the min. no. of times the balls have to be

weighed for finding out the haevy ball.

ans. 8

5. If i walk with 30 miles/hr i reach 1 hour before and if i walk with 20 miles/hr i reach 1

hour late.Find the distance between 2 points and the exact time of reaching destination is 11

am then find the speed with which it walks.

ans. 120miles and 24 miles/hr

6. There r four face cards (J,Q,K,A) all of different types(diamond,club,spade,heart) and

some conditions r given.find the order of cards

ans. king -> jack -> queen -> ace

heart diamond spade club

7. 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

|

A<-->B--C

|

D

<--> denotes husband-wife

-- denotes brothers

8. The product of 5 different temperatures is 12.If all of then r integers then find all the

temperatures

ans. -2,-1,1,2,3

9.There r 9 cities numbered 1 to 9.From how many cities the flight can start so as to reach

the city 8 either directly or indirectly such the path formed is divisible by 3.

eg. 1368-Flights goes through 1-3-6-8.

10. If i do this puzzle i find it to be hard than the last puzzle that i did before that after

that..............very complex stmt.

Is that puzzle difficult,easy,can't say or depends on the no. of puzzles

11. Replace each letter by a digit. Each letter must be represented by the same digit and no

beginning letter of a word can be 0.

O N E

O N E

O N E

O N E

-------

T E N

-------

Ans: 0 =1, N = 8 ,E = 2, T = 7.

12. Ann, Boobie, Cathy and Dave are at their monthly business meeting. Their occupations

are author, biologist, chemist and doctor, but not necessarily in that order. Dave just told

the biologist that Cathy was on her way with doughnuts. Ann is sitting across from the

doctor and next to the chemist. The doctor was thinking that Boobie was a goofy name for

parent's to choose,but didn't say anything. What is each person's occupation?

Ans: Since Dave spoke to the biologist and Ann sat next to the chemist and across the

doctor, Cathy must be the author and Ann the biologist. The doctor didn't speak, but David

did, so Bobbie is the doctor and Dave the chemist.

13. Sometime after 10:00 PM a murder took place. A witness claimed that the clock must

have stopped at the time of the shooting. It was later found that the postion of both the

hands were the same but their positions had interchanged. Tell the time of the shooting

(both actual and claimed).

Ans: Time of shooting = 11:54 PM Claimed Time = 10:59 PM.

14. Next number in the series is 1 , 2 , 4 , 13 , 31 , 112 , ?

Ans: 224.

No number has digits more than 4. All of them are 1 , 2, 4, 8 , 16 , 32 , 64 converted to

numbers in base 5.

15. Shahrukh speaks truth only in the morning and lies in the afternoon, whereas Salman

speaks truth only in the afternoon. A says that B is Shahrukh. Is it morning or afternoon and

who is A - Shahrukh or Salman?

Ans: Afternoon.A is Salman.

16. Two trains starting at same time, one from Bangalore to Mysore and other in opposite

direction arrive at their destination 1 hr and 4 hours respectively after passing each other.

How nuch faster is one train from other?

Ans: Twice.

17. There are 6 volumes of books on a rack kept in order ( ie vol.1, vol. 2 and so on ). Give the

position after the following changes were noticed. All books have been changed Vol.5 was

directly to the right of Vol.2 Vol.4 has Vol.6 to its left and both weren't at Vol.3's place.Vol.1

has Vol.3 on right and Vol.5 on left. An even numbered volume is at Vol.5's place Find the

order in which the books are kept now.

Ans: 2, 5,1,3,6,4.

18. 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 were different?

Ans: Only 0 1 6 8 and 9 can be read upside down. So on rearranging these digits, we get the

answer as 10968.

19. The shape in the sketch below is that of a square attached to half of a similar square.

Divide it into four equal pieces.

Ans: Hint : The figure can be divided into 12 equal triangles.

20) There are two balls touching each other circumferencically. The radius of the big ball is

4 times the diameter of the small all. The outer small ball rotates in anticlockwise direction

circumferencically over the bigger one at the rate of 16 rev/sec. The bigger wheel also rotates

anticlockwise at N rev/sec. What is 'N' for the horizontal line from the centre of small wheel

always is horizontal.

21)

1 2 3 4

+ 3 4 5 5

----------

4 6 8 9

- 2 3 4 5

----------

2 3 4 4

+ 1 2 5 4

------------

3 6 9 8

------------

Q) Strike off any digit from each number in seven rows (need not be at same place) and

combine the same operations with 3 digit numbers to get the same addition. After this strike

off another digit from all and add all the No.s to get the same 2 digit No. perform the same

process again with 1 digit No.s. Give the ' no.s in 7 rows at each stage.

22) There is a safe with a 5 digit No. The 4th digit is 4 greater thansecond digit, while 3rd

digit is 3 less than 2nd digit. The 1st digit is thrice the last digit. There are 3 pairs whose sum

is 11. Find the number.

Ans: 65292.

23) there are 2 guards Bal and Pal walking on the side of a wall of a wearhouse(12m X 11m)

in opposite directions. They meet at a point and Bal says to Pal "See you again in the other

side". After a few moments of walking Bal decides to go back for a smoke but he changes his

direction again to his previous one after 10 minutes of walking in the other(opposite)

direction remembering that Pal will be waiting for to meet. If Bal and Pal walk 8 and 11 feet

respectively, how much distance they would have travelled before meeting again.

24.  13 kigs and 6 libs can produce 510 tors in 10 hrs, 8 kigs and 14 libs can produce 484 tors

in 12 hrs.

Find the rate of production of tors for kigs and libs. Express the answer in tors/hr.

25)

xxx)xxxxx(xxx

3xx

-------

xxx

x3x

-------

xxx

3xx

-------

Q) Find the 5 digit No.

Hint: 5 is used atleast once in the calculation.

26) A fly is there 1 feet below the ceiling right across a wall length is 30m at equal distance

from both the ends. There is a spider 1 feet above floor right across the long wall eqidistant

from both the ends. If the width of the room is 12m and 12m, what distance is to be travelled

by the spider to catch the fly, if it takes the shortest path.

27) Ramesh sit around a round table with some other men. He has one rupee more than his

right person and this person in turn has 1 rupee more than the person to his right and so on,

Ramesh decided to give 1 rupee to his right & he in turn 2 rupees to his right and 3 rupees to

his right & so on. This process went on till a person has 'no money' to give to his right. At

this time he has 4 times the money to his right person. How many men are there along with

Ramesh and what is the money with poorest fellow.

28)Question related to probabilities of removing the red ball from a basket, given that two

balls are removed from the basket and the other ball is red. The basket contains

blue,red,yellow balls.

29)Venkat has 1boy&2daughters.The product of these children age is 72.The sum of their

ages give the door numberof Venkat.Boy is elder of three.Can you tell the ages of all the

three.

30)L:says all of my other 4 friends have money

M:says that P said that exact one has money

N:says that L said that precisely two have money

O:says that M said that 3 of others have money.

P:Land N said that they have money.

All are liers.

Who has money & who doesn't have?

31)Post man has a data of name surname door number, pet name of 4 families. But only one

is correct for each family. There are a set of statements & questions.

33) 4 couples have a party. Depending on the set of statements, find who insulted whom and

who is the host of the party.

34) 5 women given some of their heights (tall,medium,short) Hair( long, plainted),

stards(Black or Brown), sari,2 medium,2-short.Tall->no sari.Plainted->medium. Answer

the combinations.

35) A person has to go both Northwards & Southwards in search of a job. He decides to go

by the first train he encounters.There are trains for every 15 min both southwards and

northwards. First train towards south is at 6:00 A.M. and that towards North is at 6:10. If

the person arrives at any random time, what is the probability that he gets into a train

towards North.

36) A person has his own coach&. Whenever he goes to railway station he takes his coach.

One day he was supposed to reach the railway station at 5 O'clock. But he finished his work

early and reached at 3 O'clock. Then he rung up his residence and asked to send the coach

immediately. He came to know that the coach has left just now to the railway station. He

thought that the coach has left just now to the railway station. He thought that he should

not waste his time and started moving towards his residence at the speed of 3 miles/hr. On

the way, he gets the coach and reaches home at 6 o'clock. How far is his residence from

railway station.

37) Radha,Geeta & Revathi went for a picnic. After a few days they forgot the date, day and

month on which they went to picnic. Radha said that it was on Thursday, May 8 and Geeta

said that it was Thursday May 10. Revathi said Friday Jun 8. Now one of them told all things

wrongly, others one thing wrong and the last two things wrongly. If April 1st is tuesday,

what is the right day, date and month?

38. There is 66x33m rectangular area. Ram is 11/8 times faster than Krishna. Both of them

started walking at opposite ends and they met at some point then, Ram said "See you in the

other end" Then they continued walking. After some time Ram thought he will have tea so

he turned back walked back 15 meters then he changed his mind again andcontinued

walking. How much Krishna has traveled by the time they meet?

39. There are 5 burglars and once went to a bakery to rob it obviously The first guy ate 1/2 of

the total bread and 1/2 of the bread. The second guy ate 1/2 of the remaining and 1/2 of the

bread. The third guy ,fourth guy and fifth guy did the same. After fifth guy there is no bread

left out. How many bread are there?

40. All members belonging to D are members of A.

All members belonging to E are members of D.

All members belonging to C are members of both A & D.

Some members of A does not belong to D. All members belonging to D are members of E.

5 questions are there.

41. Write each statements true or false:-

1. The sum of the 1st three statements and the 2nd false statement gives the true statement.

2.The no. of true statements false statement.

3. The sum of 2nd true statement and 1st false statement gives the first true statement.

4. There are at most 3 false statements.

5.There is no two consecutive true statements.

42. There are twelve consecutive flags at an equal interval of distance. A man passes the 8th

flag in 8 seconds. How many more seconds will he take to pass the remaining 4 flags?

43. A person has to cover the fixed distance through his horses. There are five horses in the

cart. They ran at the full potential for the 24 hours continuously at constant speed and then

two of the horses ran away to some other direction. So he reached the destination 48 hours

behind the schedule. If the five horses would have run 50 miles more, then the person

would have been only 24 hours late. Find the distance of the destination.

44. A boat M leaves shore A and at the same time boat B leaves shore B. They move across

the river. They met at 500 yards away from A and after that they met 300 yards away from

shore B without halting at shores. Find the distance between the shore A & B.

45. A person was going through train from Bombay to Pune. After every five minutes he

finds a train coming from opposite direction. Velocity of trains are equal of either direction.

If the person reached Pune in one hour then how many trains he saw in the journey?

46. Food grains are to be sent to city from godown. Owner wants to reach the food grains at

11 O' Clock in the city. If a truck travels at a speed of 30km/hr then he will reach the city one

hour earlier. If the truck travels at a speed of 20km/h then he will reach the city one hour

late. Find the distance between the godown to city. Also with which speed the truck should

travel in order to reach at exactly 11 'O clock.

47. There are five persons A,B,C,D,E whose birthdays occur at the consecutive days.

Birthday of A is some days or day before C & birthday of B is exactly the same days or day

after E. D is two days older than E. If birth day of C is on Wednesday then find out the

birthdays of other.

48. Persons say these statements.

A says either Democratic or liberal wins the elections.

B says Democratic wins.

C says neither democratic nor liberal wins the election.

Of these only one is wrong. Who wins the election?

49. Six persons A,B,C,D,E &F went to soldier cinema. There are six consecutive seats. A sits

in the first seat followed by B, followed by C and so on. If A taken on of the six seats, then B

should sit adjacent to A. C should sit adjacent to A or B. D should sit adjacent to A, B or C

and so on. How many possibilities are there ?

50. Suppose there are four grades A, B, C, D. (A is the best and D is the worst) 4 persons

Jack, Jean, Poul and Lucy wrote the final exam and made the statements like this:-

1. Jack: If I will get A then Lucy will get D.

2. Lucy: If I will get C then Jack will get D.

Jack grade is better than Poul grade.

3. Jean: If Jean doesn't get A then Jack will not get A.

4. Poul: If Jack get A, then Jean will not get B, Lucy will get C, I won't either A or B.

If all the above statements are true, then which person will get which grade?

51. Each man dances with 3 women, Each women dances with 3 men. Among each pair of

men they have exactly two women in common. Find the no. of men and women.

52. A survey was taken among 100 people to find their preference of watching t.v.

programmes. There are 3 channels. Given no of people who watch at least channel 1, at least

channel 2,at least channel 3, no channels at all, at least channels 1 and 3, at least channels 1

and 2, at least channels 2 and 3. Find the no of people who watched all three.

53. A bird keeper has got P pigeon, M mynas and S sparrows. The keeper goes for lunch

leaving his assistant to watch the birds. Suppose p=10, m=5, s=8.

a.) When the bird keeper comes back, the assistant informs that x birds have escaped. The

bird keeper exclaims oh no! all my sparrows are gone. How many birds flew away.

b.) when the bird keeper come back, the assistant told him that x birds have escaped. The

keeper realised that atleast 2 sparrows have escaped. What is minimum no of birds that can

escape.

54. Select from the five alternatives A,B,C,D,E. At the end of each question, two conditions

will be given. The choices are to filled as follows.

A: If a definite conclusion can be drawn from condition 1.

B: If a definite conclusion can be drawn from condition 2.

C: If a definite conclusion can be drawn from condition 1 and 2.

D: If a definite conclusion can be drawn from condition 1 or 2.

E: No conclusion can be drawn using both conditions.

1. Person 1 says N<5

Person 2 says n>5.

Person 3 says 3N>20

Person 4 says 3n>10

Person 5 says N<8.

What is the value of N?

55. There are N coins on a table. There are two players A&B. You can take 1or 2 coins at a

time. The person who takes the last coin is the loser. A always starts first.

1. If N=7, then

a) A can always win by taking two coins in his first chance.

b) B can win only if A takes two coins in his first chance.

c) B can always win by proper play.

d) none of the above.

2. A can win by proper play if N is equal to

a) 13    b) 37    c) 22    d) 34    e) 48

Ans: E.

3. B can win by proper play if N is equal to

a) 25    b)26   c) 32   d) 41   e) none

4. if N<4, can A win by proper play always?

56. There are 4 parties A,B,C,D. There are 3 people x,y,z. X-says A or D will win. Y-says A

will not win. Z-says B or D will not win. Only one of them is true. Which party won?

57. 5 persons R,S,T,U,V are contesting for a medal. Evaluation is over English, Maths,

Physics, Chemistry and Hindi. Toper will get 5 marks, least will get 1 mark. No ties any

where. R get 24 and won the overall medal. V gets first in Chemistry and third in Hindi, T

got consistent scores in 4 subjects. Their final standings where in the alphabetical order.

What was the score of S in Chemistry.

57. There are 3 types of castes, say A,B,C. A- always tells truth, B- always false, C-

alternating.

X says --> Z is of C type, I am of A type.

Y says --> X is a B type.

Z says --> X is of B type.

Who is of which type?

58. Persons A and B. Person A picks a random no. from 1 to 1000. Then person B picks a

random no. from 1 to 1000. What is the probability of B getting no. greater then what A has

picked?

59. Three boys and three girls brought up together. Jim, Jane, Tom, Virgina, Dorthy, XXX.

They marry among themselves to form three couples. Conditions are:-

i) Sum of their ages would be the same.

ii) Virgina was the oldest.

iii) Jim was dorthy's brother.

iv) Sum of ages Jane+Jim and Tom+dorthy is same.

Give the three couples.

60. X^(1/3) - X^(1/9) =60. Solve for X.

61. X Z Y+X Y Z = Y Z X.

Find the three digits.

62. Two boats start from opposite banks of river perpendicular to the shore. One is faster

then the other. They meet at 720 yards from one of the ends. After reaching opposite ends

they rest for 10mins each. After that they start back. This time on the return journey they

meet at 400yards from the other end of the river. Calculate the width of the river.

63. Basketball Tournament organizers decided that two consecutive defeats will knock out

the team. There are 51 teams participating. What is the maximum no. of matches that can be

played.

64. The Master says to his grandmaster that me and my three cousins have ages in prime

nos. only. Summation of our ages is 50. Grandmaster who knows the age of the master

instantly tells the ages of the three cousins. Tell the ages of three cousins.( 1 is not

considered as prime no.)

65. There are two families Alens and smiths. They have two children each. There names are

A,B,C,D whose ages are different and ages are less then or equal to 11. The following

conditions are given:-

i) A's age is three years less then his brother's age .

ii) B is eldest among the four.

iii) C is half the age of the eldest in Alens family.

iv) The difference in sum of the ages of Alens children and smiths children is same as that of

five years ago.

Find the ages of all the children.

66. a,b,c,d,e are having numerical values. There are some conditions given:-

a) a=c <=== b!=e

b) Difference between a and c as same as difference between c and b as same as difference

between a and d.

c) c<a and c>d.

Then find a,b,c,d,e.

67. There are six cards in which it has two king cards. all cards are turned down and two

cards are opened.

a) What is the possibility to get at least one king.

b) What is the possibility to get two kings.

68. There are 5 persons a,b,c,d,e and each is wearing a block or white cap on his head. A

person can see the caps of the remaining four but can't see his own cap. A person wearing

white says true and who wears block says false.

i) a says i see 3 whites and 1 block.

ii) b says i see 4 blocks.

iii) e says i see 4 whites.

iv) c says i see 3 blocks and 1 white.

Now find the caps weared by a,b,c,d and e.

69. There are two women, kavitha and shamili and two males shyam, aravind who are

musicians. Out of these four one is a pianist, one flutist, violinist and drummer.

i) Across aravind beats pianist.

ii) Across shyam is not a flutist.

iii) Kavitha's left is a pianist.

iv) Shamili's left is not a drummer. v) Flutist and drummer are married.

70. When Arthur is as old as his father Hailey is now, he shall be 5 times as old as his son

Clarke is now. By then, Clarke will be 8 times older than Arthur is now. The combined ages

of Hailey and Arthur are 100 years. How old is Clarke?

71. The seven digits in this subtraction problem are 0, 1, 2, 3, 4, 5 and 6. Each letter

represents the same digit whenever it occurs.

D A  D  C  B

-    E   B  E  G

--------------------

B F  E  G

--------------------

What digit is represented by each letter?

72. The Jones have named their four boys after favorite relatives; their friends, the Smiths,

have done the same thing with their three boys. One of the families has twin boys. From the

following clues, can you determine the families of all seven children and their ages?

i) Valentine is 4 years older than his twin brothers.

ii) Winston, who is 8, and Benedict are not brothers. They are each named after a

grandfather.

iii) Briscoe is two years younger than his brother Hamilton, But three years older than

Dewey.

iv) Decatur is 10 years old.

v) Benedict is 3 years younger than Valentine; they are not related.

vi) The twins are named for uncles.

73. Motorboat A leaves shore P as B leaves Q; they move across the lake at a constant speed.

They meet first time 600 yards from P. Each returns from the opposite shore without

halting, and they meet 200 yards from. How long is the lake?

74. On the Island of imperfection there is a special road, Logic Lane, on which the houses

are usually reserved for the more mathematical inhabitants. Add, Divide and Even live in

three different houses on this road (which has houses numbered from 1-50). One of them is

a member of the Pukka Tribe, who always tell the truth. Another is a member of the Wotta

Tribe, who never tell the truth and the third is a member of the Shalla Tribe, who make

statements which are alternately true and false, or false and true. They make statements as

follows:-

ADD:

1. The number of my house is greater than that of Divide's.

2. My number is divisible by 4.

3. Even's number differs by 13 from that of one of the others.

DIVIDE :

1. Add's number is divisible by 12.

2. My number is 37.

3. Even's number is even.

EVEN :

1. No one's number is divisible by 10.

2. My number is 30.

3. Add's number is divisible by 3.

Find to which tribe each of them belongs, and the number of each of their houses.

75. The names of the inhabitants of Walkie Talkie Land sound strange to the visitors, and

they find it difficult to pronounce them, due to their length and a few vowel sounds they

contain. The Walkie Talkie guide is discussing the names of four inhabitants –

A,B,C and D. Their names each contain upto eight syllables, although none of the four

names contain the same number. Two of the names contain no vowel sounds; one contains

one vowel sound; and one contains two vowel sounds. From the Guide's statements below,

determine the number of syllables and vowel sounds in each of the four Walkie Talkie

names:-

i) The one whose name contains two vowel sounds is not A.

ii) C's name does not contain more than one vowel sound or fewer than seven syllables.

iii) The name with seven syllables does not contain exactly one vowel sound.

iv) B and C do not have names with the same number of vowel sounds.

v) Neither the name with five syllables nor the name with seven syllables contains more

than one vowel sound.

vi) Neither the name with six syllables, nor the B's name, contains two vowel sounds.