Infosys Placement Paper Aptitude - Puzzle TAGORE INTERNATIONAL SCHOOL, DELHI-16 Jul 2006
Q2. A puzzle has 100 pieces.By combining 2 pieces at a time, a move is made.In how many minimum number of ways the puzzle can be completed??
Ans:- 49+49=98 moves
Q3.I went to kalota.there is a belief that men speak truth always,women speak alternately i.e. if her first statement is true, then her next statement will b false.same goes for boy n girl..
I asked a child passing by-? are you a boy or girl???
Got reply in their language so culdnt understand. Fortunately their parents kno our language. ?kibi said, ?I m a boy? ? said the first parent.?no, kibi lied.kibi is a girl? said the other parent.
a) whether kibi is a girl or a boy?
b) Which parent made the first statement??
Ans:- a) girl
Q4.a person picked first marble,left one,picked the next,left two, picked the next, left three n so on until he got the last marble.at the end he observed that he has picked 5% of the total..how many has he picked actually??
Q5. there are two system of temperatures such that 14 degrees in system A is equal to 36 degrees in system B n 133 degrees in system A is equal to 87 degrees in system B. at what degree will these systems be equal.??
Ans:- (A-14)/133= (B-36)/87
Put A=B n get the answer?it is 77.6 degrees
Q6 two friends set their clocks to same time.1st one's clock lag 1min/hr and other's gain it by 2 min/hr...aftr sometime when they met again they found that the diff between their watches was 1 hr..tell me how much time ago was their watch showing same time....
Ans:- first watch lag = 1min per hour
Second watch lag = 2 min per hour
So toatal lag = 3 min per hour
i.e 3 min ------------------- in 1 hour
1hour(60 min) lag-------------- (1hour * 60 min) / 3 min
Ans =20 hours
Q7. A man walks at 4km/hr for some time then up the hill at 3km/hr and then down the hill at 4km/hr and then through the same plane back to home at 4km/hr...total time he took for it was 6 hrs i.e. he started at 3 pm and came back at 9 pm...tell the distance he travelled one side....
Ans:- let plain b x km and hill be y km so
x/4 + y/3 + x/4 + y/4 = 6 (speed= distance/time)
Q8. some question on average speed-
Ans= 2ab/(a+b) --- a and b are two different speeds
Q9 complete the series-
Ans a) 22 -1 =3
32 ? 22 = 5
52 - 32 =16
162 - 52 = 231 ans
b) 22 -1 =3
82 -1= 63 ans
Q10. there is a person who prepares window panes. There are certain conditions for preparing left n right display panes using stones- diamond,garnet,opal, sapphire, ruby and one more stone(dnt remember the name..let it be X. each pane can hav three stones only.
a) sapphire n garnet has to be together.
b) Diamond is always in right display pane
c) X always in left display pane
1) what is the possible combination of left display?
Ans so on?
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