
INFOSYS POWER PREPARATION
Puzzles
1. Two people X & Y walk on the wall of a
go down in opposite direction. They meet at a
point on one side and then go ahead. X after walking
for some time, walks in opposite direction for
15 mtrs. Then again he turns back and walks in
the original direction. What distance did Y walk
before they met again, if X walks 11 mtrs by the
time Y walks 8 mtrs.
2. Problem from SAKUNTALA DEVI 'PUZZLES TO
PUZZLE U'. Problem no: 23( Walking back to
happiness.)
The walking time : 55 mins.
1. There are twelve consecutive flags at
an equal interval of distance. A man passes
the 8th flag in 8 seconds. How many more seconds
will he take to pass the remaining 4 flags
?
2. A person has to cover the fixed distance
through his horses. There are five horses
in the cart. They ran at the full potential
for the 24 hours continuously at constant
speed and then two of the horses ran away
to some other direction. So he reached the
destination 48 hours behind the schedule.
If the five horses would have run 50 miles
more, then the person would have been only
24 hours late. Find the distance of the destination.
3. A boat M leaves shore A and at the same
time boat B leaves shore B. They move across
the river. They met at 500 yards away from
A and after that they met 300 yards away from
shore B without halting at shores. Find the
distance between the shore A & B.
4. A person was going through train from
Bombay to Pune. After every five minutes he
finds a train coming from opposite direction.
Velocity of trains are equal of either direction.
If the person reached Pune in one hour then
how many trains he saw in the journey ?
5. Food grains are to be sent to city from
go down. Owner wants to reach the food grains
at 11 O' Clock in the city. If a truck travels
at a speed of 30km/hr then he will reach the
city one hour earlier. If the truck travels
at a speed of 20km/h then he will reach the
city one hour late. Find the distance between
the go down to city. Also with which speed
the truck should travel in order to reach
at exactly 11 'O clock.
6. Praveen, Ranjan, Shiva went to dinner
in the city. (There were some conditions given
as someone always take tea after dinner where
as some take coffee after dinner whereas someones
choice is inspired by the choice of others.
One question of this type is given given in
the MIND TEASURES -By Summers.)
Ans: Ranjan & Shiva
7. There are five persons A,B,C,D,E whose
birthdays occur at the consecutive days. Birthday
of A is some days or day before C & birthday
of B is exactly the same days or day after
E. D is two days older than E. If birth day
of C is on Wednesday then find out the birthdays
of other.
1. Statements given by different family members.
1. B is my father's brother
2. E is my mother-in-law.
3. C is my son-in -law's brother
4. A is my brother's wife.
A,B,C,D,E are the family members. Who made
above statements and give their relations.
Ans: A,B are couple.
E is B's brother-in-law.
D is B's son.
C is B's brother
Ans: statement Member
1 D 2 B 3 E 4 B
2. e means belong.
All members of E e D.
All members of D e A.
Not all members of D e E.
Not all members of A e D.
All members of C e both A and B.
some questions are asked about relation. use
venn diagram.
3. Fill the empty slots. Three FOOTBALL teams
are there. Given below the list of matches.
you have to fill the blanks at appropriate
star symbols
played won lost draw Goals for Goals against
A 2 2 *0 *0 *7 1
B 2 *0 *1 1 2 4
C 2 *0 *1 *1 3 7
the slots with stars are answers. 4 marks
BC drew with 2-2
A won on B by 2-0
a won on C by 5-1
4. Three girls are discussing about the party
which they attended in the past. 1st girl:
Party was on May 8Th , Thursday. 2nd girl:
Party was on May 10th ,Tuesday. 3rd girl:
Party was on June 8th Friday. Conditions:
1.One girl's statement totally wrong.
2.In one girl's statement only one part is
correct( means it may be date, year or month).
3.In another girl's statement except one part
, every thing is true.
Find the Day the party held. (5marks).
Ans :May 8th Tuesday may be correct) (ans
may be MAY 10 SUNDAY. check once again)
5. A ship is away from the shore by 180 miles.
A plane is traveling at 10 times speed of
the ship. How long from the shore will they
meet? (200miles) Distance travelled by plane
= 1/10 distance traveled by ship + 180
6. Every station in N railroad issue every
other station's ticket. some stations are
added. Now they have to issue 46 more tickets.
say the No. of stations after and before added.
Ans. let N(N-1) = t;
(N+x)(N+x-1) = t+46;
trail and error method x=2 and N=11
7. 3 persons say these statements. A says
either Democratic or liberal wins the elections.
B says Democratic wins.C says neither democratic
nor liberal wins the election. Of these only
one is wrong. who wins the election?
8. A clock showing 6 o'clock takes 30 secs
to strike 6 times. How long will it take to
strike 12 at midnight ?
Ans.66 secs.
9. A software engineer starts from home at 3pm
for evening walk. He walks speed of 4kmph on level
ground and then at a speed of 3kmph on the uphill
and then down the hill at a speed of 6kmph to
the level ground and then at a speed of 4kmph
to the home
If he reaches home at 9pm . What is the distance
on the way
ans 24 km
10. A bag contains certain number of files, Each
file is numbered with one digit of 0 to 9. Suppose
the person wants to get the number between 1 to
2000(or 7000 check). How many minimum no. of files
should be present in the bag.
11. A + B + C +D = D + E + F + G = G + H + I
=17. If A = 4. What are the values of D and G.
Each letter taken only one of the digit from 1
to 9.
ans: A = 4 ,B = 2, C =6, D = 5, E = 3, F =
8, G = 1, H = 7, I = 9.
12. Six persons A,B,C,D,E &F went to soldier
cinema. There are six consecutive seats. A sits
in the first seat followed by B, followed by C
and so on. If A taken on of the six seats, then
B should sit adjacent to A. C should sit adjacent
to A or B. D should sit adjacent to A, B or C
and so on. How many possibilities are there ?
13. Suppose there are four grades A, B, C, D.
(A is the best and D is the worst) 4 persons Jack,
Jean, Poul and Lucy wrote the final exam and made
the statements like this
1. Jack: If I will get A then Lucy will get
D
2. Lucy: If I will get C then Jack will get
D. Jack grade is better than Poul grade.
3. Jean: If Jean doesn’t get A then Jack will
not get A 4. Poul: If Jack get A, then Jean
will not get B, Lucy will get C, I won’t either
A or B If all the above statements are true,
then which person will get which grade.
14. Each man dances with 3 women, Each women
dances with 3 men. Among each pair of men they
have exactly two women in common. Find the no.
of men and women.
15.There are 111 players participating in a singles
tennis tournament. The player who is loosing will
be out of the tournament. For each and every match,
One new ball is taken. Find the no. of balls required
for the entire tournament.
ans:110
16.Two trains are crossing each other. the speed
of one train is given. Calculate the time for
the engine of one train crosses the other train..
chk. the question correctly.. it is available
in sakuntala devi's "puzzle 2 puzzle u"
17.Anan with her son went for shopping.. she
met her husband's mother's only daughter-in-law's
sister's husband. find the relation between anan
and the mentioned person. ans: anan-->sister's
husband
18.Question on sets: In a city,there are 23080
people. 30% read "a" newspaper. 35%
read "b" newspaper
40% read "c" neewspaper 1/3 of total
read both a and b 25% read both b and c 34% read
both a and c
1/3 read all the three. find.
1.the no. of persons who read a only.(approx,.
4000+)
2.b only(0)
3.c only
4.none of the papers
19. Question on finding the "day" six
persons are there.a..f a:the day b4 yesterday
is either friday or saturday.
b:today is saturday. c:today is not saturday but
either friday or saturday. d:day after tomorrow
is not tuesday.
e:...... f:........ answer:friday
20. Question on finding who is familiar with
which language.. some five names are given. and
five statements are given.
analyze all the statements .. e.g.. "a"
knows somewhat eng but not either urdu or tulu..
21. I have got some money in my bag .(which is
stolen after shopping I and II). I spent 10% of
my money for shopping (I) For second time,10%
of the remaining money is spent for shopping (II)
The total bill amount=Rs.18. Find the amount which
will be remaining in the bag?
answer:Rs.81
22. An arrangement of 8 persons namely (Afrin,
Mun, John, Rider, Mark, Bal, Smith, ) sitting
around around a table (circular or not was not
mentioned) with some conditions. 8 marks
23. Every station in a rail road issue every
other station's ticket. Some stations are added.
Now they have to issue 46 more tickets. The number
of stations before and after addition is ?
24. A girl is at twelve. Her mother's age is
forty five years. The girl demanded a bi-cycle
upon which the mother told to give her one, when
the age of the mother is three times that of her
daughter. When will she get the bicycle?
25. There is a large cube pained red on all side.
Six-straight cuts are made resulting in 27 small
cubes.
State how many cubes have:
3 sides colored
2 sides colored
1 sides colored
uncolored
26. A boat is going downstream. A man follows
the boat to some extent and then comes back upstream
to the point from where he started. It took him
10 mints to return back, At this time a hat fell
in the river and started floating downstream to
which the man again chased and got it within 1000
yards.Find the speed of the current.
27. There is a class of students where one third
were under 12 one half were under 13 and 6 were
eleven yrs.
The number of students between 11 and 12 were
equal that of between 12 and 13.
Find the figure!