Puzzles ....... at 9:58 AM

1. You are given two candles of equal size, which can burn 1hour each. You have
to measure 90 minutes with these candles.(There is no scale or clock). Also u r
given a lighter.
Ans: 1. First light up the two ends of the 1st candle. When
it will burn out light up one end of the second candle.  (30+60=90)

2.
Try the similar problem to measure 45 minutes.
Ans: First light-up the two
ends of the 1st candle and one end of the 2nd candle. When the 1st candle will
burn out ,then  light up the both ends of the 2nd  candle (15+30=45)

3.
You r given a thermometer. What can u do by this without measuring the
temperature?
Ans: if u put thermometer into a tree it won't grow anymore,
will just die off

4. How it is possible to place four points that are
equidistance from each other? OR U r a landscape designer and your boss asked u
to design a landscape such that you should  place 4 trees equidistance from each
other.  (Distance from each tree to the other must be same)
Ans: Only 3
points can be equidistant from each other. But if u place points in the shape of
a pyramid then its possible

5. You are given a cake; one of its corner is
broken. How will u cut the rest into Two equal parts?
Ans: Slice the
cake

6. How will you recognize the magnet & magnetic material &
non-magnetic material?
Ans: Drag one piece of material over another. There is
no  attractive force in the middle portion of the magnet. OR  Get a piece of
thread and tie up with the one bar and check  for poles. If it iron bar then it
moves freely and if it is magnetic bar then it fix in one direction according to
poles.

7. If one tyre of a car suddenly gets stolen.... and after
sometime u find the tyre without the screws how will u make ur journey
complete
Ans: Open 3 screws, 1 from each tyre and fix the tyre.

8. How
can u measure a room height using a thermometer?
Ans: temp varies with
height. but its dependent on various other factors like humidity, wind
etc.

9  What is the height of room if after entering the room with a
watch ur head strikes a hanging bulb?
Ans: Oscillate the hanging bulb.
Calculate the time period for one complete oscillation by Simple Harmonic Motion
(SHM) of the handing bulb. Put it in the formula T=2 * 3.14 * (L/G)^1/2 L will
be the length of the hanging thread. Add the L with ur height to get the height
of the room.

10. Color of bear.... if it falls from 1m height in
1s.
Ans: We get 'g' perfect 10 which is only in poles...hence polar
bear...color White

11. How will you measure height of building when you
are at the top of the building? And if you have stone with you.
Ans: Drop the
stone and find the time taken for the stone to reach the ground. find height
using the formula s = gt*t/2 ( s = height, a= initial velocity=0, g=9.8m/s, t =
time taken)

12. How wud u catch and receive a ball in same direction?
(Dropping is from north and receiving from bottom not accepted, as it is 2
directions)

13. 25 statements given. Some tell truth, some false and some
alternators. Find out the true statements.

14. Can u make 120 with 5
zeros?
Ans: Factorial (factorial (0)+factorial (0)+factorial (0)+factorial
(0)+factorial (0)) = 120

15.There are three people A, B, C. Liars are of
same type and Truth speaking people are of same type. Find out who is speaking
truth and who is speaking false from the following statements:
a) A says: B
is a liar.
b) B says: A and C are of same type.
Ans: lets assume A is
speaking truth. It means B is a liar then it means A and C are not of same
type.

16. 5 swimmers A, B, C, E, F and many conditions of their
 positions like there are Two b/w A & F, B doesn't win etc the question was
to find who was b/w like E & D?

17. in a race u drove 1st lap with
40kmph and in the second lap at what speed u must drive so that ur average speed
must be 80kmph.

18. You have to draw 3 concentric circles with a line
passing thru their center without lifting hand.
Ans: Start the line complete
one circle move inside circles along the line and then draw second circle. Like
wise rest.

19. A rectangular paper is there. At a corner a rectangular
size paper is taken from it. Now you have to cut the remaining  paper into two
equal halves.
Ans: try it on the paper. You must fold the part that has
 complete paper and select Half of it and then fold the part that cut and
selects half of it and then cut along the folding.

20. Value of
(x-a)(x-b)........(x-z)

21. There are 9 coins. 8 are of 1 gm and 1 is of
2 grams. How will you find out the heavier coin in minimum number of weighing
and how many weighing it will need?
Ans: 2 weighing (Divide the number of
coins into 3 parts at each weighing)