Aptitude - Puzzle

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

b)      mother

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)

x+y=12 ans

Q8. some question on average speed-

Ans= 2ab/(a+b) --- a and b are two different speeds

Q9 complete the series-

a)      1,2,3,5,16,_

b)      1,2,3,8,_,224

Ans a) 2² -1 =3

            3² – 2² = 5

            5² - 3² =16

16² - 5² = 231 ans

b) 2² -1 =3

            3² -1=8

            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.

Conditions:-

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…