INFOSYS QUESTIONS

Infosys Placement Papers | Infosys Interview Procedure | 
Infosys Aptitude Questions | Infosys TechniInfosysl 
Questions | Infosys Interview Questions



Section A

1) A man collects cigarette stubs and makes one full 
cigarette with every 8 stubs.
   If he gets 64 stubs how many full cigarettes can he 
smoke. 

2) A soldier looses his way in a thick jungle. At random he 
walks from his camp but mathematically in an interesting 
fashion. First he walks one mile East then half mile to 
North. Then 1/4 mile to West, then 1/8 mile to South and so 
on making a loop. 
Finally how far he is from his camp and in which direction. 

3)  How can 1000000000  be written as a product of two 
factors neither of them containing zeros 

4)  Conversation between two mathematcians: 
First : I have three childern. The product of their ages is 
36. 
          If you sum their ages, it is exactly same as my 
neighbour's door number on my left. 
The second mathematician verfies the door number and says 
that it is not sufficient. 
Then the first says " Ok one more clue is that my youngest 
is really the youngest". Immmediately the second 
mathematician answers . 
Can you answer the question asked by the first 
mathematician? 
What are the childeren ages? 

5) Light glows for every 13 seconds . How many times did it 
glow between 1:57:58 and 3:20:47 am.

6) 500 men are arranged in an array of 10 rows and 50 
columns according to their heights.
     Tallest among each row of all are asked to fall out.
     And the shortest among them is A. 
     Similarly after resuming that to their original 
podsitions that the shortest among each column are asked to 
fall out. 
     And the tallest among them is B .
     Now who is taller among A and B ? 

7)  A person with some money spends1/3 for cloths, 1/5 of 
the remaining for food and 1/4 of the remaining for travel.
     He is left with Rs 100/- . 
     How much did he have with him in the begining ? 

8)  There are six boxes containing 5 , 7 , 14 , 16 , 18 , 
29 balls of either red or blue in colour.     Some boxes 
contain only red balls and others contain only blue.
     One sales man sold one box out of them and then he 
says 
   " I have the same number of red balls left out as that 
of blue ". 
     Which box is the one he solds out ? 
9)  A chain is broken into three pieces of equal lenths 
containing 3 links each.
     It is taken to a backsmith to join into a single 
continuous one . 
     How many links are to to be opened to make it ? 

10)  Grass in lawn grows equally thick and in a uniform 
rate.
       It takes 24 days for 70 cows and 60 days for 30 cows 
to eat the whole of the grass.
       How many cows are needed to eat the grass in 96 
days.? 

Infosys Placement Papers | Infosys Interview Procedure | 
Infosys Aptitude Questions | Infosys TechniInfosysl 
Questions | Infosys Interview Questions


Answers Section A 

Q-1
Ans: 8+1=9

Q-2
Ans: Distance travelled in north and south directions 
        1/2 - 1/8 + 1/32 - 1/128 + 1/512 - and so on 
        = 1/2/((1-(-1/4)) 
       Similarly in east and west directions 
        1- 1/4 + 1/16 - 1/64 + 1/256 - and so on 
        = 1/(( 1- ( - 1/4)) 
Add both the answers

Q-3
Ans: 2 power 9 x 5 power 9 

Q-4
Ans 1,6 and 6

Q-5
Ans : 383 + 1 = 384 

Q-6
Ans A 

Q-7
Ans: Rs 250/- 

Q-8
Ans: Total no of balls = 89 and (89-29 /2) = 60/2 = 30 
and also 14 + 16 = 5 + 7 + 18 = 30 

Q-9
Ans : 2.

Q-10
Ans : 20 
g - grass at the beginning 
r - rate at which grass grows, per day 
y - rate at which one cow eats grass, per day 
n - no of cows to eat the grass in 96 days
g + 24*r = 70 * 24 * y 
g + 60*r = 30 * 60 * y 
g + 96*r = n * 96 * y 
Solving, n = 20.
Section B

1.  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

2. 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?

3. 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).

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

5. 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.

6. 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?

7. 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.
8. 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?

9. The shape in the sketch below is that of a square 
attached to half of a similar square.Divide it into four 
equal pieces

10. Supposing a clock takes 7 seconds to strike 7. How 
mlong will it take to strike 10?

Section B Answers

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

Q-2
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.

Q-3
Ans: Time of shooting = 11:54 PM
        Claimed Time     = 10:59 PM

Q-4
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

Q-5
Ans: Afternoon ; A is Salman.

Q-6
Ans: Twice

Q-7
Ans: 2 , 5 , 1 , 3 , 6 , 4

Q-8
Ans: Only 0 1 6 8 and 9 can be readupside down.So on 
rearranging these digits we get the answer as 10968

Q-9
Ans: Hint : the figure can be divided into 12 equal 
triangles

Q-10
Ans: 10 1/2 seconds.


Infosys Placement Papers | Infosys Interview Procedure | 
Infosys Aptitude Questions | Infosys TechniInfosysl 
Questions | Infosys Interview Questions