Infosys Written test Puzzles with answers
1. You are given two candles of equal size, which can burn 1 hour 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.
OR
Ans: Drop it from the room and find the time at which it strikes the floor. Using physics formula s = (at^2)/2 (IM NOT SURE ABOUT THIS ONE)
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
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 = a + gt ( 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)
Ans: ?
13. 25 statements given. Some tell truth, some false and some alternators. Find out the true statements.
Ans: ?
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?
Ans: ?
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.
Ans: its impossible! if u drove the first lap in 40 kmph, its impossible that the
average speed of both the laps is 80kmph.
for eg. consider one lap distance = 80km.
time req. to cover 1 lap = 80km/40kmph = 2 hrs.
if the avg. speed is 80kmph, then the total time would have taken = 160kms/80kmph = 2 hrs.
same is the case with any other distance u consider. so the avg to be 80kmph is impossible
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. (I DONT UNDERSTAND THIS ONE!!)
20. Value of (x-a)(x-b). . . . (x-z)
Ans: 0 as there's X-X term
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)
Showing posts with label infosys puzzles. Show all posts
Showing posts with label infosys puzzles. Show all posts
Infosys Puzzle test written test
Infosys Puzzle test written test
1. A man plants a small plant in the centre of his garden. It doubles in size everyday. If it covers the entire garden in 50 days then what is the time taken to fill half the garden?
(ANS:49 days)
2. There are 3 children A,B,C & they have 20 sweets. 1st type of sweet costs 4 cents,2nd type is 4 for 1 penny ,3rd type is 2 for 1penny. If the total cost is Rs 20 then what is the no of each type of sweet
3. 2 taps A & B so that A fills atank in 10 min & B fills it in 1/4 of an hr. C empties the tank in 7&half min. Tot time to fill the tank with all 3 fning together?
(ANS:30min)
4. Jim ,Harry,Mark & Smith have occupations – policeman, druggist ,grocer&butcher. Under given conditions find their respective occupations. – Jim and Harry being neighbours who take turns to drive each other to work -Butcher walks to work. -The only time the policeman saw the grocer was when the former fined the latter for overspeeding. -The policeman does not live near the butcher etc.
(ANS:Jim-druggist,Harry-grocer,Mark-butcher,Smith-policeman)
5. In a certain island natives speak lies & visitors speak truth. I was on a visit there & asked the waiter in a hotel to tell me whether the woman sitting opp to me was a native or not. He came & said that “She says that she is a visitor here”. Can you infer whether the waiter is a native / visitor?
(ANS:native,I think)
6. K,L,M,N,O,P are the 6 members of a family. P is the sister of M. L is the brother of O’s husband. N is the father of K & the grand father of M.There are 2 fathers, 3 brothers & 1 mother in the family. Based on this some questions are there.
(Answer:N-grandfather,L&K-his sons,K-husband of O,M&P are the son & daughter of K&O)
7. My boss spent 1/6th of his life as a boy, 1/12th in business & 5&1/7 yrs somewhere else which brings him to the time Jim was born. Jim was made the alderman 4 yrs back when he was 1/2 of the boss’s age. What is the boss’s age?
(Answer: 36&4/7 – not sure)
8. Information about a survey regarding students liking 1 poet despising another etc given & based on it some questions are there.
9. A thief breaks into a jewellery store and takes 1/2 +2 present, continues till 5th thief finds 1 diamond remaining
(Answer:76)
10. Holmes watch 2 min fast,Watson s is 1 min slow.If diff b/w time shown is 1hr then when the watches set before at right time?
(Answer:20hrs)
Q1) There is a number which is less than 500,and is divisible by 1/3,1/4,1/5,1/7.Find the number. (3 marks)
ANS) LCM of 3,4,5,7=420
Q2) A+B+C+D=D+E+F+G=G+H+I=17 & A=4.Find the valus of D and G.(5 marks)
ANS) You need to do simple algebraic steps n ll get the answer.
Q3)A lady gives half of what she has and 1 cent to the 1st person,then half of what s left and 2cents to the 2nd person finally half of what s left and 3cents to the 3rd person n she is left with 1 penny.how much she had whn she started off?(6 marks)
ANS)Shakunta devi question/puzzle
Q4)A,B,C,D,E were 5 persons. A and B were chatting in english when D joined and they started talkingi in spanish which is the only common language between them.. Similarly some knew portugese,french,italian. Its a repeated questions .(8 marks)
Q5)A,B,C,D were 4 persons. They decided to go 2 different places – hardware shop, bank, grocery, jwelery shop. Then some conditions were provided like monday hardware shop is closed, tuesday jwelery, thursday grocery and bank is open on only monday, tuesday, wednesday. All of them are closed are closed on sundays.
A:me and D decied to come early this week but couldnot come.
B:i couldnot do what i wanted ,but if i ahd come yesterday or tomorrow then it wud ve been wise.
C:i have no problem as i can do wht i want even today and yesterday and also tomorrow.
D:i would have come yesterday or day before so tht i cud have done my work. Basing on these you have to tell who were to go which place.(8 marks)
Q6)John asked his father to tell him his father’s age. To which his father replied”my father was X yrs old in the year X^2,obviously we r speaking of the 20th century”. When was grandfather born?(3 marks)
ANS)44^2=1936. 1936-44=1892
Q7)Shakuntala devi questions on bees..
ANS)15
1. A man plants a small plant in the centre of his garden. It doubles in size everyday. If it covers the entire garden in 50 days then what is the time taken to fill half the garden?
(ANS:49 days)
2. There are 3 children A,B,C & they have 20 sweets. 1st type of sweet costs 4 cents,2nd type is 4 for 1 penny ,3rd type is 2 for 1penny. If the total cost is Rs 20 then what is the no of each type of sweet
3. 2 taps A & B so that A fills atank in 10 min & B fills it in 1/4 of an hr. C empties the tank in 7&half min. Tot time to fill the tank with all 3 fning together?
(ANS:30min)
4. Jim ,Harry,Mark & Smith have occupations – policeman, druggist ,grocer&butcher. Under given conditions find their respective occupations. – Jim and Harry being neighbours who take turns to drive each other to work -Butcher walks to work. -The only time the policeman saw the grocer was when the former fined the latter for overspeeding. -The policeman does not live near the butcher etc.
(ANS:Jim-druggist,Harry-grocer,Mark-butcher,Smith-policeman)
5. In a certain island natives speak lies & visitors speak truth. I was on a visit there & asked the waiter in a hotel to tell me whether the woman sitting opp to me was a native or not. He came & said that “She says that she is a visitor here”. Can you infer whether the waiter is a native / visitor?
(ANS:native,I think)
6. K,L,M,N,O,P are the 6 members of a family. P is the sister of M. L is the brother of O’s husband. N is the father of K & the grand father of M.There are 2 fathers, 3 brothers & 1 mother in the family. Based on this some questions are there.
(Answer:N-grandfather,L&K-his sons,K-husband of O,M&P are the son & daughter of K&O)
7. My boss spent 1/6th of his life as a boy, 1/12th in business & 5&1/7 yrs somewhere else which brings him to the time Jim was born. Jim was made the alderman 4 yrs back when he was 1/2 of the boss’s age. What is the boss’s age?
(Answer: 36&4/7 – not sure)
8. Information about a survey regarding students liking 1 poet despising another etc given & based on it some questions are there.
9. A thief breaks into a jewellery store and takes 1/2 +2 present, continues till 5th thief finds 1 diamond remaining
(Answer:76)
10. Holmes watch 2 min fast,Watson s is 1 min slow.If diff b/w time shown is 1hr then when the watches set before at right time?
(Answer:20hrs)
Q1) There is a number which is less than 500,and is divisible by 1/3,1/4,1/5,1/7.Find the number. (3 marks)
ANS) LCM of 3,4,5,7=420
Q2) A+B+C+D=D+E+F+G=G+H+I=17 & A=4.Find the valus of D and G.(5 marks)
ANS) You need to do simple algebraic steps n ll get the answer.
Q3)A lady gives half of what she has and 1 cent to the 1st person,then half of what s left and 2cents to the 2nd person finally half of what s left and 3cents to the 3rd person n she is left with 1 penny.how much she had whn she started off?(6 marks)
ANS)Shakunta devi question/puzzle
Q4)A,B,C,D,E were 5 persons. A and B were chatting in english when D joined and they started talkingi in spanish which is the only common language between them.. Similarly some knew portugese,french,italian. Its a repeated questions .(8 marks)
Q5)A,B,C,D were 4 persons. They decided to go 2 different places – hardware shop, bank, grocery, jwelery shop. Then some conditions were provided like monday hardware shop is closed, tuesday jwelery, thursday grocery and bank is open on only monday, tuesday, wednesday. All of them are closed are closed on sundays.
A:me and D decied to come early this week but couldnot come.
B:i couldnot do what i wanted ,but if i ahd come yesterday or tomorrow then it wud ve been wise.
C:i have no problem as i can do wht i want even today and yesterday and also tomorrow.
D:i would have come yesterday or day before so tht i cud have done my work. Basing on these you have to tell who were to go which place.(8 marks)
Q6)John asked his father to tell him his father’s age. To which his father replied”my father was X yrs old in the year X^2,obviously we r speaking of the 20th century”. When was grandfather born?(3 marks)
ANS)44^2=1936. 1936-44=1892
Q7)Shakuntala devi questions on bees..
ANS)15
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