Infosys  Placement Paper   Aptitude - Puzzle   shreds Ernakulam-19 Aug 2006

Infosys  Placement Paper   Aptitude - Puzzle   shreds Ernakulam-19 Aug 2006


  • Posted by  FreshersWorld 
    7 Jan, 2012

                                           infosys test on august 19th at ernakulam

    Hi all I am amod from NSS COLLEGE OF ENGG PALAKKAD  .i attended infosys test.

    this site is all i looked upto it really helped me a lot,The following were the questions asked for the written test

     

    1.i play a game with my friend and we decide to exchange a rupee for each one loses.if I gained 3 rupee in the end and my friend won three times then how many games we played in all.

     

    A)    9 .i gained 3rs means I won three games more than my friend

    He won three times means I must win 6 times to gain 3rs

    Therefor total no of games=6+3=9

     

     

       2.series problem

    a> 3125,256,27,_,1

    b>3,10,7,8,_12,9,16

     

    ans)a:4

          b:11

    approach a:1^1,2^2,3^3,4^4,5^5?

    b:1st element  +last element=19

    2nd+2ndlast=19???.

    Therefore 8+11=19

     

    3.two watches r set together one was faster by 1min per hr.other was slower by 2min per hr.after sometime the two watches had 1 hr difference .after how many hrs they showed one hr diff?

    Ans)20 hrs

    In 1 hr net diff=1+2=3min

    Therefore for 1hr diff i.e for 60min diff to happen total no of hrs=60/3=20hrs.

     

    4. A s/f engg starts from home at 3pm for evening walk. He walked with a speed of 4km/hr on level grnd, then with a speed of 3km/hr uphill and then downhill at a speed of 6kmph to the level grnd and then at a speed of 4kmph to the home at 9pm. what is one way distance?

    Ans) 12 .soln : x/4+y/3+y6+x/4=9hr

    x+y=12.

     

    5.same old thief problem .half diamonds+2,2nd thief half of the remaining+2,3rd and 4th thief?only 1 diamond left u can get it in previous papers.

    Ans)76

     

    6.there is a tank with 3 pipes .one is  for draining and the other two for filling.one of the pipe can fill the tank in 7 and half minutes and the other in 6 min.the draining pipe can drain water from the whole tank in 8 in.will the tank ever be filled completely? If yes how?

    Ans)yes. I think the ans is 30 min.

    Soln.work done by pipe A in unit time=1/6

    Work done by pipe B in unit time=7+1/2=2/15

    Pipe C (draining pipe)=1/8

    So the whole tank will b filled in=1/6+2/15-1/8

    =1/30

    Therefore 30 min.

     

    7.same problem x,c,v,had 20 rs.they ha to buy 20 stuff from it.one was for 4rs.other was for .25rs next one for .5rs ( theygave amnt in terms of cents and pennies so study the relation).u can find this qn in previous paper.

    3 variables but two equations.

     

    8.same old gems problem

    A jewller makes a windw displayhe has 7 gems of which he needs to display 6..

    U can find this in previous paper

     

    9. four friends r chatting in a room one by one entering into the kitchen room and they r taking the samosas and returning.at the end no samosa .one among the four had eaten it.only one is telling the truth and remaining r lying type of qn u can find in most papers

     

    10.this was a lengthy qn I had seen it in previous paper but didn?t know the soln

    Four persons sitting around the table.in front of each of them r cards. two yellow,red green ,blue .both sides of the card r painted.no one knows the card colour of the bottom face.

     


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