Infosys  Placement Paper   Aptitude - Puzzle   St Michaels Academy,Chennai-10 Sep 2006

Infosys  Placement Paper   Aptitude - Puzzle   St Michaels Academy,Chennai-10 Sep 2006

  • Posted by  FreshersWorld 
    7 Jan, 2012


    I am haridas from of engg.... i think everyone may find this usefull...

    1)x^(1/3) - x^(1/9)=60

    put x=2^18

    After this.... questions are not in order....

    2) cubes problem i.e is from previous papers
    the surface of the  cube is painted with red colour. By six straight cuts 27 cubes are formed then
    a) how many cubes are there with 0 side red colour
    b) how many cubes are there with 1 side red colour
    c) how many cubes are there with 2 side red colour
    d) how many cubes are there with 3 side red colour

    0 faces coloured-1
    1 faces coloured-6
    2 faces coloured-12
    3 faces coloured-8

    3)edward was the youngest this puzzle was pretty easy and i feel each one of u can solve it. it goes something like john is

    older than dave but younger than edward and goes on ( sorry folks don remember the exact Qn but  its pretty easy) there were

    11 names and the  Qn was to find the youngest of them.

    ans   edward is the youngest

    4)Two couples are going fo a purchase , the man buys a suit + hat =15 ,and girl buys her hat same as her husband's suit and

    the rest for her dress... sort of like this only could not remember...

    5)This question i din solve...i remember the question partially it was like... there were totallly 100men in that 70 were

    married,75 having car,80 having own house ,85 having dog... from this find out the number of men having all the four..

    somewhat like this..

    6)100 knockout matches find out how many matches will it take to decide the winner...,

    Ans: 99

    7)A,B,C,D,E were 5 people.A and B were talking in english whn D joined and they changed to spanish whichi is the only common

    language between them....similarly some knew portugese,french,italian.the was easy n is also repeated qs .(8 marks)

    spanish is the most commonly spoken language.

    3 of them speak portuguese.
    a and c can talk in  spanish but when b arrives they start talking in english

    a and b speak in italian 

    out of them one person speaks 1 language,1 person speaks 2 languages,1 person speaks 3 languages,1 person speaks 4

    languages,1 person speaks 5 languages.
    (could not remember entire question.......but it was like this only and you have to give answers of 4 following questions


    8)A man starts from XYZ city and drives a constant speed. After some time he sees a milestone with two digits written on it.

    after he drives for an hour, he sees another milestone with the same digits, but in reversed order. After another hour of

    journey, he sees another milestone with original digits but with a zero between them.

    What was the speed of his car if milestones show kilometers?               

    Ans:45 k.m/hr?..number is 16,61,106     

    9) A five digit no whose third digit is one greater than the sum of the first two digits and the third digit is double the

    fourth digit and fourth digit is double the fifth digit and second digit is greater than first digit by 5. and if we multiply

    fourth and fifth digit we get third digit.
    SOL)     16842

    10)There was a cycle race going on. 1/5th of the those in front of a person and 5/6th of those behind him gives the total

    number of  participants. How many people took part in the race?  (3 marks)   
    Ans : 31


    Let the total number of participants be X

    So, [(x-1)/5 + 5(x-1)/6] = X


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