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Solved Sample Puzzles For Infosys And Wipro Placement 16 January 2009 at 6:41 pm by Premium Blogger

Puzzles asked in 2008 Placement papers of Reputed IT companies like Infosys, Wipro, Satyam Computers, Tech Mahindra, Birlasoft, TCS, HCL and other MNCs.

1. You are given two candles of equal size, which can burn 1hour each. You have to measure 90 minutes with these candles.(There is no scale or clock). Also u r given a lighter.

Ans: 1. First light up the two ends of the 1st candle. When it will burn out light up one end of the second candle. (30+60=90)

2. Try the similar problem to measure 45 minutes.

Ans: First light-up the two ends of the 1st candle and one end of the 2nd candle. When the 1st candle will burn out ,then light up the both ends of the 2nd candle (15+30=45)

3. You r given a thermometer. What can u do by this without measuring the temperature?

Ans:
if u put thermometer into a tree it won’t grow anymore,will just die off

4. How it is possible to place four points that are equidistance from each other? OR U r a landscape designer and your boss asked u to design a landscape such that you should place 4 trees equidistance from each other. (Distance from each tree to the other must be same)

Ans: Only 3 points can be equidistant from each other. But if u place points in the shape of a pyramid then its possible

5. You are given a cake; one of its corner is broken. How will u cut the rest into Two equal parts?

Ans: Slice the cake

6. How will you recognize the magnet & magnetic material & non-magnetic material?

Ans: Drag one piece of material over another. There is no attractive force in the middle portion of the magnet. OR Get a piece of thread and tie up with the one bar and check for poles. If it iron bar then it moves freely and if it is magnetic bar then it fix in one direction according to poles.

7. If one tyre of a car suddenly gets stolen…. and after sometime u find the tyre without the screws how will u make ur journey complete

Ans: Open 3 screws, 1 from each tyre and fix the tyre.

8. How can u measure a room height using a thermometer?

Ans: temp varies with height. but its dependent on various other factors like humidity, wind etc.

9 What is the height of room if after entering the room with a watch ur head strikes a hanging bulb?

Ans: Oscillate the hanging bulb. Calculate the time period for one complete oscillation by Simple Harmonic Motion (SHM) of the handing bulb. Put it in the formula T=2 * 3.14 * (L/G)^1/2 L will be the length of the hanging thread. Add the L with ur height to get the height of the room.

10. Color of bear…. if it falls from 1m height in 1s.

Ans: We get ‘g’ perfect 10 which is only in poles…hence polar bear…color White

Latest / recent puzzles put / asked in Technical or HR interviews of IT companies placement question papers for freshers and on campus drives

11. How will you measure height of building when you are at the top of the building? And if you have stone with you.

Ans:
Drop the stone and find the time taken for the stone to reach the ground. find height using the formula s = gt*t/2 ( s = height, a= initial velocity=0, g=9.8m/s, t = time taken)

12. How wud u catch and receive a ball in same direction? (Dropping is from north and receiving from bottom not accepted, as it is 2 directions)

13. 25 statements given. Some tell truth, some false and some alternators. Find out the true statements.

14. Can u make 120 with 5 zeros?

Ans: Factorial (factorial (0)+factorial (0)+factorial (0)+factorial (0)+factorial (0)) = 120

15.There are three people A, B, C. Liars are of same type and Truth speaking people are of same type. Find out who is speaking truth and who is speaking false from the following statements:

a) A says: B is a liar.

b) B says: A and C are of same type.

Ans:
lets assume A is speaking truth. It means B is a liar then it means A and C are not of same type.

16.5 swimmers A, B, C, E, F and many conditions of their positions like there are Two b/w A & F, B doesn’t win etc the question was to find who was b/w like E & D?

17. in a race u drove 1st lap with 40kmph and in the second lap at what speed u must drive so that ur average speed must be 80kmph.

18. You have to draw 3 concentric circles with a line passing thru their center without lifting hand.

Ans:
Start the line complete one circle move inside circles along the line and then draw second circle. Like wise rest.

19. A rectangular paper is there. At a corner a rectangular size paper is taken from it. Now you have to cut the remaining paper into two equal halves.

Ans:
try it on the paper. You must fold the part that has complete paper and select Half of it and then fold the part that cut and selects half of it and then cut along the folding.

20. Value of (x-a)(x-b)………..(x-z)

21. There are 9 coins. 8 are of 1 gm and 1 is of 2 grams. How will you find out the heavier coin in minimum number of weighing and how many weighing it will need?

Ans:
2 weighing ( Divide the number of coins into 3 parts at each weighing)

+ 10 Days Guide to Crack Infy By Premium Blogger 12 January 2009 at 6:11 pm and have 2 Comments

I am a fresher who just finsiehd my final year B.Tech Information  Technology.Being fully prepared for the selection test for Infy on June 19th, and with God’s grace I was able to get an appointment Order form Infosys.I would like to give back to the group the 10 day schedule that i followed, which may be of use in CRACKING the Infy test.If 10 days arent there for you, then you coudl leve out the days that i have used for Ravi Narula and the quantitaive Aptitude. That would bring down the number of days to 7 or 8. You need to manage your time very effeciently. Spend your itme in studying, and prayers. Prayers do help a lot .

Usually when you register with Infosys, you would get a mail atleast 10 to 12 days before the written test either by email, or by Post. Let us keep this as 10 days.Before we start off, three rules must be keep in mind.

FIRST RULE : While job hunting , check your mail on a daily basis, so that you dont get delayed info regarding test or other such details . Even the appointment order comes by email.

SECOND RULE : Once you do receive the intimating or hall ticket, check for the following books.Not all chapters need to be followed in each book and i have given the need ones in the daily schedule .

(1) Puzzles to Puzzle you – Shakuntala Devi (very Important)

(2) More Puzzles – Shakuntala Devi (very Important)

(3) Puzzles and Teasers – George Sammers (very very Important)

(4) Brain Teasers – Ravi Narula (Optional, but few old sums are here)

(5) Quantitative Aptitude – R.S Agarwal ( Important)

(6) Verbal Reasoning – R.S Agarwal (very very Important)

(7) Previous Papers – Chetana group, Mail me for more (Important)

THIRD RULE : YOU must forget all your previous failures and start afresh with firm determination and enthusiasm. Once you do this , solving puzzles become easy . I solved 9 out of 10 puzzles. Concentrate on the bigger puzzles first . This may be the way the marks are distributed:

8 marks and 6 marks – George Sammers and Verbal Reasoning (R.S Agarwal)
4 marks and 5 marks and 3 marks – Shakuntala Devi books and Ravi Narula and Quantitative Aptitude(R.S Agarwal)
Some questions from Previous Papers

Now lets start of with the schedule :

DAY 1 : Start off with Puzzles to Puzzle you – Shakuntala Devi and finish as mush as possible.Decide to only finish the book and call the day off. Note down the sums which you are not able to solve or need the answers to solve and keep this list safely. After you go through the whole book, go back to these questions and just check out the way they are solved. Sometimes they will not be explained. In this case you have no choice but to leave them. But some sums will have some funny explanations.Just remember the way or method.

DAY 2 : Now take a break off from Shakuntala Devi and then start Verbal Reasoning – R.S Agarwal . In this you just have to do the Puzzle Test Chapter fully , and have a look at the Number, Ranking and Sequence Test chapter. I contains fully George Sammers type question on easier scale but you would be able to understand the basic logic of solving George Sammers type questions.Finish off the whole book during the second day.There is just one or two methods to solve these sort of questions and the explanation is very clear . Once you get the method , you can solve all the puzzles in this, but just in case do go through all the puzzles. there have been puzzles in previous papers from here.Once ou get the method well, there will not be any revision necessary in this book . But you will have to concentrate on the method.

DAY 3 : Now back to More Puzzles – Shakuntala Dei and follow the same procedure you followed for the first book.

DAY 4 and DAY 5: Get your George Sammers book and start off solving the puzzles. The first half is kind of easy, but dont be worried if your not able to solve much. Even one or two is enough . The Rest , you just have to use the scheme and the solutions and then understand the puzzle thoroughly. Many papers have similar sums with the names changed. Try to finish the first half in a day . And start off the second half . The second half is relatively tougher, and it ill be very confusing. Just try to solve some. The second half ,  even the solutions will confuse you more. So just solve as many as you can. The rest you can make use of the solutions . If they are too complex, Leave them aside. Note down all sums you could not solve or could solve only using the solutions and list them . When you are through the whole book, just revise all the sums, giving preference to the ones that you have listed . It is okay even if you sit with George Sammers for three days. But you must fully be able to understand all the question in the First part. The second part , atleast maybe few sums are optional.

DAY 6 : Take your quantitative Aptitude book by R.S Agarwal and work out the following chapters fully. Note down tough sums and their solutions and come back to solve thme and revise them . The chapters to be done are :

(1) Time and Distance (very important)
(2) Time and Work
(3) Pipes and Cisterns
(4) Trains
(5) Boats

DAY 7 : Revise Shakuntala Devi book-1 and revise it well. Not necessary to work out the problems. Just check if your method is correct . The sums you have listed, give them extra importance. By the end of this day , you must Shakuntala Devi book-1(Puzzles to Puzzle you ) on your finger tips.


DAY 8 : Revise the book-2 of Shakuntala Devi , just how you revised the first book.End of this day you should have both Shakuntala devi books at your finger tips.


DAY 9 :
Revise George Sammers, such that you can easily solve the whole first part . The second part , leave ii , if it is tough.


DAY 10 : Check out Ravi Narula. The sums are very tough . It will be enough if you just c the solutions and understand them . Some sums are asked in some papers.( There is one question about some ANYMAN reaching ANYWHERE. His tyre gets punctured and he reaches late.If his tyre got punctured earlier / later then he would have reached earlier/later. How far did he travel..something like that).that is form this book . Many papers have this sum repeated. But the names are changed. Ravi Narula is just optional, but I suggest that you go through all sums and their solution atleast once. Dont take too much time on Ravi Narula. Just three or four hours would be sufficient.

INTERVIEW : Interview is Casual.If you have done excellently well in the test , your interview process is very simple and a walkthrough if you have good communication skills ( Speak clearly, frankly). My Interview Panel consisted of one Madame and one Sir. They asked me about Team Work, Abtou my College, About my family, My hobbies, My interests, Certain changes i would like to bring out in the current socio-economic development (I said to remove unemployment).I was not asked any puzzles in my interview. But I do have a list of puzzles that could be possibly asked. I would post them too on this forum . Interview was very friendly . You are free to ask the panel your performance and expectation of your order. Be positive. Thats a very very big Point in your HR interview.My friend had a stress interview. Be cool, Dont react.

Please do mail me in case you have any doubts. Also mail me if this post has helped you become an Infosion. I would be very happy if his post has helped few fellow Infosions out there .  pls do lemme know if you do get selected. You can also add me in your messenger. I will be online everyday, and u can send me offlines to clarify certain doubts .

Every Problem has a Solution…
Wishing you all the Best Efforts …See You in Infy. With love and prayers.