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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

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Infosys Puzzles
1. There is a escalator and 2 persons move down it.A takes 50 steps and B takes 75 steps whilethe escalator is moving down. Given that the time taken by A to take 1 step is equal to timetaken 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 totake 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=t1/2ans= (s1*t2 ~ s2*t1) / (t1 ~ t2) which gives 100.so 100 steps is the answer2. If 5/2 artists make 5/2 paintings using 5/2 canvases in 5/2 days then how many artists rrequired 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-374. 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. 85. If i walk with 30 miles/hr i reach 1 hour before and if i walk with 20 miles/hr i reach 1 hourlate. Find the distance between 2 points and the exact time of reaching destination is 11 amthen find the speed with which it walks.ans. 120miles and 24 miles/hr6. There r four face cards (J,Q,K,A) all of different types(diamond,club,spade,heart) andsome conditions r given.find the order of cardsans. king -> jack -> queen -> aceheart diamond spade club7. If A,B,C,D,E r 5 members of a family.4 of them give true statements :1. E is my mother in law2. C is my son in law's brother3. B is my father's brother4. A is my brother's wife Who made the stmt. and what r the realtions among themans. E| A<-->B--C|D<--> denotes husband-wife-- denotes brothers8. The product of 5 different temperatures is 12.If all of then r integers then find all thetemperaturesans. -2,-1,1,2,39. There r 9 cities numbered 1 to 9.From how many cities the flight can start so as to reach thecity 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 afterthat..............very complex stmt.Is that puzzle difficult,easy,can't say or depends on the no. of puzzles11. 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 EO N EO N EO 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 areauthor, 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 andnext to the chemist. The doctor was thinking that Boobie was a goofy name for parent's tochoose,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 thedoctor, Cathy must be the author and Ann the biologist. The doctor didn't speak, but Daviddid, 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 havestopped at the time of the shooting. It was later found that the postion of both the hands werethe same but their positions had interchanged. Tell the time of the shooting (both actual andclaimed). 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 tonumbers in base 5.15. Shahrukh speaks truth only in the morning and lies in the afternoon, whereas Salmanspeaks 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 oppositedirection 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 theposition after the following changes were noticed. All books have been changed Vol.5 wasdirectly 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 srcinal number if all digits weredifferent? Ans: Only 0 1 6 8 and 9 can be read upside down. So on rearranging these digits, we get theanswer as 10968.19. The shape in the sketch below is that of a square attached to half of a similar square. Divideit 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 4times the diameter of the small all. The outer small ball rotates in anticlockwise directioncircumferencically over the bigger one at the rate of 16 rev/sec. The bigger wheel also rotatesanticlockwise at N rev/sec. What is 'N' for the horizontal line from the centre of small wheelalways 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) andcombine the same operations with 3 digit numbers to get the same addition. After this strikeoff another digit from all and add all the No.s to get the same 2 digit No. perform the sameprocess 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 3
rd
digit is3 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) inopposite 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 directionagain 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 feetrespectively, 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 torsin 12 hrs. Find the rate of production of tors for kigs and libs. Express the answer in tors/hr.25.xxx)xxxxx(xxx3xx-------xxxx3x-------xxx3xx-------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 distancefrom both the ends. There is a spider 1 feet above floor right across the long wall equidistantfrom both the ends. If the width of the room is 12m and 12m, what distance is to be traveled 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 hisright 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 tohis right & so on. This process went on till a person has 'no money' to give to his right. At thistime he has 4 times the money to his right person. How many men are there along withRamesh 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 theirages give the door numberof Venkat.Boy is elder of three.Can you tell the ages of all thethree.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 iscorrect 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 andnorthwards. First train towards south is at 6:00 A.M. and that towards North is at 6:10. If theperson arrives at any random time, what is the probability that he gets into a train towardsNorth.36. A person has his own coach&. Whenever he goes to railway station he takes his coach. Oneday 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 coachimmediately. He came to know that the coach has left just now to the railway station. Hethought 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 andmonth on which they went to picnic. Radha said that it was on Thursday, May 8 and Geeta saidthat 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 isthe right day, date and month?38. There is 66x33m rectangular area. Ram is 11/8 times faster than Krishna. Both of themstarted walking at opposite ends and they met at some point then, Ram said See you in theother end Then they continued walking. After some time Ram thought he will have tea so heturned back walked back 15 meters then he changed his mind again and continued 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 ½ of thetotal 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 8thflag 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 thecart. They ran at the full potential for the 24 hours continuously at constant speed and then twoof the horses ran away to some other direction. So he reached the destination 48 hours behindthe 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 theriver. 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 atrain coming from opposite direction. Velocity of trains are equal of either direction. If theperson 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 11O' Clock in the city. If a truck travels at a speed of 30km/hr then he will reach the city one hourearlier. If the truck travels at a speed of 20km/h then he will reach the city one hour late. Findthe distance between the godown to city. Also with which speed the truck should travel in orderto reach at exactly 11 'O clock.

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