## December 30, 2008

### Missing Number Series

Find the missing number in the series?
9, 61, 52, 63, 94, ___ , 18?

## December 29, 2008

### Time and Distance Problem

A man had covered 2/3 of distance by cycling and remaining
covered on feet. For this he took twice the time to
the cycling. Find how much speed is greater for cycling
than on feet?

### Brain logic

The answer to this question contains how many Characters ?

Options:

a)five

b)one

c)three

d)two

e)four

## December 23, 2008

### Date puzzle

On October 2, 2001, the date in MMDDYYYY format was a
palindrome (same forwards as backwards).That is 10/02/2001.
When was the last date that this occurred on before year 2001?

## December 15, 2008

### 302 dollar problem

You are having \$302 with you. Divide \$302 (in whole \$ increments)
into a number of bags so that I can ask for any amount between
\$1 and \$302, and you can give me the proper amount by giving me
a certain number of these bags without opening them. What is the
minimum number of bags you will require?

### Water jar problem

You have a three gallon and a five gallon measuring device.
How will you measure out four gallons.

## December 12, 2008

### Find the angle

What would be the angle between hour and minute hand,
when time is 7:20 ?

## December 11, 2008

### Crime scene puzzle

There is a man dead in a locked office, sitting at his desk.
On the desk there are a couple of pieces of blank paper,
a pen and a sealed envelope. The office is locked from the
inside. No-one has directly killed him. How was he killed?

### Permutation & Combination

A bag Contains 5 black balls, 10 red balls and
12 white balls...Atmost in how many draws you
could get a pair....?

### Funny question of the day

In a pond there are 10 fish, one of them dies, and the water
level of the pond increases. How?

## December 10, 2008

### Who did it?

Three of these statements are untrue,

Mr Red: "Mr Blue did it."

Mr Blue: "Mr Red did it."

Mr Green: "Mr Blue's telling the truth."

Mr Yellow: "Mr Green's not lying

Do you know who did it??

### Number 1000 Buildings

A certain street has 1000 buildings. A sign-maker is
contracted to number the houses from 1 to 1000.
How many zeroes will he need?

### Who is doctor, who is lawyer?

Mr. Hari, his wife, his son, his mother, among these people
one of them is a Lawyer, and the other is Doctor

a) If lawyer is younger than the Doctor,
then they dont have blood relations
b) If lawyer is a women, then Doctor and
lawyer have the blood realations
c) If Doctor is man, then lawyer is also a man.

Who is doctor, who is lawyer?

### 3d cube problem

A block of wood in rectangular form that is
4cm x 10cm x 11cm all surfaces of pink rose color.
If the block of wood is cut into 440 cubes of
1cm × 1cm x 1cm each, how many cubes would
have color pink rose?

### Solve the series

10 , 9 , 60 , 90 , 70 , 66 , ....

## December 9, 2008

### Light Bulb

A light bulb is hanging in the first floor of the room.
There are three switches in the ground floor room.
One of these switches belongs to that light bulb.
The light bulb is not lit and the switches are in off
state. There is only one chance to visit the room.
How can it be determined which of these switch
is connected to the light bulb.

## December 8, 2008

### What is the population of TIBET

How many people are living in Tibet
With the help of following data can you find
How many people were listed as living in Tibet?

The population of some countries is calculated based upon
some logic and listed here:-

USA 130,000
England 410,000
France 340,000
Peru 200,000
Brazil 340,000
Greece 300,000
Japan 270,000

## December 5, 2008

### Find the Number

There is a 10 digit number whose first digit is the no:
of occurence of 0's in the number. Second number is
no: of occurence of 1's in the number. Third number
is the no: of occurence of 2's in the number. 4'th no:
is the number of occurence of 3's in the number. and so
on up to 10th digit is no of 9's in the number.
what is the number?

### Age problem

I am 5 times as old as you were when I was as old as you are.
Find our present ages.

### True Lies

Tina & Meena are twins. One of them lies while the other
is truthful. I asked one of them, "Does Tina lie?" "Yes",
was the answer.Did I speak to Tina or Meena?

## December 3, 2008

if
1=5,
2=55,
3=555,
4=5555,

then

5=??????????

### Find the distance travelled

Two Buses enter in a tunnel 225 Km long, one of those buses
is travelling at 75 Km/h and at the same time another one
running at a speed of 37.5 Km/h from opposite directions.
As soon as they enter the tunnel a butterfly flying at
898 Km/h starts from one bus and heads toward the other one.
As soon as it reaches the other one it turns around and
heads back toward the first, going back and forth between
the buses until the buses collide in a fiery explosion
in the tunnel (the butterfly survives).
how far did the butterfly travel?

### Number Problem

Using following numbers and following operators you have to produce 28.

Numbers are 1, 5, 7 and 8.

Operators are +, -, * and /

You can use ( ) brackets as well.

Rules:

1-You can use each number only once.

2-You can not use any other operator or symbol.

3-You can not use 1 and 5 as 15.

4-You have to use all of the above number mentioned (1,5,7 and 8)

## December 2, 2008

### Number Sequence problem

For all the Mathematics champs (Including future champs also),
find the 6th Number?

1, 2, 6, 42, 1806, ?

## December 1, 2008

A man wanted to enter an exclusive club but did not know the
password that was re quired. He waited by the door and
listened.A club member knocked on the door and the
doorman said, "twelve." The member replied, "six " and was
let in.A second member came to the door and the doorman said,
"six." The member replied, "three" and was let in.The man
thought he had heard enough and walked up to the door.
The doorman said ,"ten" and the man replied, "five.
"But he was not let in. What should have he said?

### Lateral Thinking

A girl who was just learning to drive went down a one-way
street in the wrong direction, but didn't break the law.
How come?

## November 26, 2008

### Catch the Thief

There are 13 caves arranged in a circle. There is a
thief hiding in one of the caves. Each day the the thief
can move to any one of of the caves that is adjacent to the
cave in which he was staying the previous day. And each day,
you are allowed to enter any two caves of your choice.
What is the maximum number of days in which you can
catch the thief?

### Age puzzle

The average age of 10 members of a committee is the same
as it was 4 years ago, because an old member has been
replaced by a young member. Find how much younger is
he new member ?

## November 18, 2008

### Microsofts Interview Question

There is a table on which a number of coins are placed. You also
know that there are as many coins with Head up as many coins with
Tail up. Now you have to divide the coins (number of coins is even)
into two equal piles such that number of coins with Heads up and
Tails up in either piles be the same. The catch is you are
blind folded and you cannot determine the sides (for sure)
if you are blinded

## November 1, 2008

### Calender Problem

Syam showed up for work on Monday only to discover that
his delivery truck was in the shop for maintenance. He
was told it would be ready two days after the day before
the day after tomorrow. On what day can Syam expect the
truck to be back on the road?

## October 24, 2008

### Rectangular Cake Puzzle

How do you cut a rectangular cake into
two equal pieces when someone has already
removed a rectangular piece from it?
The removed piece can be of any size
or orientation. You are allowed just one
straight cut.

## October 20, 2008

### Logic Puzzles

dollars to do so. You may buy no more or less than
100 squeegies, and the total price must be exactly
100 dollars. There is no sales tax. Red squeegies
cost \$6.00. Yellow squeegies cost \$3.00. Blue
squeegies cost \$0.10. How many of each must you buy?

## October 15, 2008

### Microsoft's Puzzles

How many points are there on the globe
where, by walking one mile south, one
mile east, and one mile north,you reach
the place where you started?

## October 14, 2008

### River Crossing Puzzles

A farmer is returning from market, where he
bought a she-goat, a wolf and cabbage. On the
way home he must cross a river. His boat is
little, allowing him to take only one of the
three things. He can't keep the she-goat
and the cabbage together (because the she-goat
would eat it), nor the she-goat with the wolf
(because the she-goat would be eaten).
How shall the farmer get everything on the
other side (without any harm)?

### Cannibals and Missionaries

Three missionaries and three cannibals wanted
to get on the other side of a river. There was
a little boat on which only two of them can fit.
There can never be on one side more cannibals
than missionaries because of a possible tragedy.

1,2,3,5,8,....

### Einsteins Riddles

There are 5 ships in a port.

1. The Greek ship leaves at six and carries
coffee.
2. The ship in the middle has a black chimney.
3. The English ship leaves at nine.
4. The French ship with a blue chimney is to
the left of a ship that carries coffee.
5. To the right of the ship carrying cocoa
is a ship going to Marseille.
6. The Brazilian ship is heading for Manila.
7. Next to the ship carrying rice is a ship
with a green chimney.
8. A ship going to Genoa leaves at five.
9. The Spanish ship leaves at seven and is to
the right of the ship going to Marseille.
10. The ship with a red chimney goes to Hamburg.
11. Next to the ship leaving at seven is
a ship with a white chimney.
12. The ship on the border carries corn.
13. The ship with a black chimney leaves at eight.
14. The ship carrying corn is anchored next
to the ship carrying rice.
15. The ship to Hamburg leaves at six.

Which ship goes to Port Said? Which ship carries tea?

## October 13, 2008

### Reasoning Puzzles

97 baseball teams participate in an annual state
tournament. The champion is chosen for this
tournament by the usual elimination scheme. That is,
the 97 teams are divided into pairs, and the two
teams of each pair play against each other. The
loser of each pair is eliminated, and the remaining
teams are paired up again, etc. How many games must
be played to determine a champion?

## October 5, 2008

### Critical thinking puzzle

1. The first question with B as the correct answer is:

A. 1
B. 4
C. 3
D. 2

2. The answer to Question 4 is:

A. D
B. A
C. B
D. C

3. The answer to Question 1 is:

A. D
B. C
C. B
D. A

4. The number of questions which have D as the correct answer is:

A. 3
B. 2
C. 1
D. 0

5. The number of questions which have B as the correct answer is:

A. 0
B. 2
C. 3
D. 1

### Brain Teasers

Three people check into a hotel. They pay £30 to the
manager and go to their room. The manager suddenly
remembers that the room rate is £25 and gives £5 to
the room the bellboy reasons that £5 would be
difficult to share among three people so he pockets
£2 and gives £1 to each person. Now each person
paid £10 and got back £1. So they paid £9 each,
totalling £27. The bellboy has £2, totalling £29.
Where is the missing £1?

## September 30, 2008

### Clock Problem ?

Suppose a clock's seconds hand is exactly on a
second’s mark (one of the sixty) and exactly 22
second marks ahead of the hour hand. What is
the time?

## September 23, 2008

### WHO DONE IT ?

Three of these statements are untrue, so who done it?

Mr Red: "Mr Blue did it."

Mr Blue: "Mr Red did it."

Mr Green: "Mr Blue's telling the truth."

Mr Yellow: "Mr Green's not lying

## September 16, 2008

### Infosys Puzzle

If 5/2 artists make 5/2 paintings
using 5/2 canvases in 5/2 days then
how many artists r required to make
25 paintings using 25 canvases
in 25 days?

### Infosys Interview Puzzle

We have two buckets, 1 of capacity
3liter and another of 5 liter.we have
5 liters of water. so how will we make
combinations such that 1 bucket will have
exactly 4 liters of water?

## September 11, 2008

### Who is Lier ?

This was a burglary in the Silver City
jewelry store last Sunday.
Three suspects: Robert, Scott, and Tommy
were caught and questioned.
Each person said, "One of the other two stole it.
I did not do it."

Later on the police found out that Tommy
was lying and there was only one thief.
Who was the thief?

## September 10, 2008

### Number Series?

What is the next number...
23 5 12 3 15 13 ?

Hint: A way to say "HELLO"!

## September 5, 2008

### Logic Puzzle

If you put a coin in an empty bottle
and insert a cork into the neck of the bottle,
how could you remove the coin without
taking the cork out or breaking the bottle?

### Funny puzzle

If a boy and a half could eat a hot dog
and a half in a minute and a half,
how many hot dogs could six boys eat
in six minutes?

## September 1, 2008

### Einstein's Puzzle

FACTS OF THE PUZZLE
[This quiz was made up by Albert Einstein and
according to him 98% will not solve it.]

There are five houses in five different colours.
In each house lives a person of a different nationality.
These five owners drink a certain beverage, smoke a
certain brand of cigarette and keep a certain pet.
No owners have the same pet, smoke the same brand
of smoke or drink the same drink.

HINTS

1] The Brit lives in the red house.
2] The Swede keeps dogs as pets.
3] The Dane drinks tea.
4] The green house is on the left of the white house.
5] The green house owner drinks coffee.
6] The person who smokes Pall Mall rears birds.
7] The owner of the yellow house smokes Dunhill.
8] The man living in the house right in the center
drinks milk.
9] The Norwegian lives in the first house.
10] The man who smokes Blend lives next to the one
who keeps cats.
11] The man who keeps horses lives next to the man
who smokes Dunhill.
12] The owner who smokes Blue Master drinks beer.
13] The German smokes Prince.
14] The Norwegian lives next to the blue house.
15] The man who smokes Blend has a neighbour who
drinks water.
The question is: WHO OWNS FISH?

## August 29, 2008

### Crossing The Lake Puzzle

There are four people in an adventure race that
need to get across a lake. They have a small
canoe. The rules say that only the slowest person
in the canoe can paddle, only one or two can be
in the canoe at a time, and they must all cross
in the canoe. From practice, they know that:

Ann can paddle across in 1 minute.

Bill can paddle across in 2 minutes.

Sue can paddle across in 5 minutes.

Mike can paddle across in 10 minutes.

How do they get everyone across the river
in the fastest time without breaking
the rules?

## August 22, 2008

### The Lazy Gardener

It takes two gardeners 8 days to mow a lawn.

One is lazy and one is energetic.

The energetic one would only take 12 days to mow it on his own.

How many days would the lazy gardener take to mow the lawn on his own?

## August 14, 2008

### Microsofts Puzzle

You have 5 jars of pills. Each pill weighs
10 gram, except for contaminated pills contained
in one jar, where each pill weighs 9 gm. Given
a scale, how could you tell which jar had the
contaminated pills in just one measurement?

### Doctor and Engineer Puzzle

One of Mr. Bajaj, his wife, their son and Mr. Bajaj's
mother is an Engineer and another is a Doctor.

· If the Doctor is a male, then the Engineer is a male.
· If the Engineer is younger than the Doctor, then the
Engineer and the Doctor are not blood relatives.
· If the Engineer is a female, then she and the Doctor
are blood relatives.

Can you tell who is the Doctor and the Engineer?

### What is the number?

what is number in this series
1,16,36,__,81,100,144

a)64
b)61
c)49
d)144

## August 11, 2008

### Think carefully!!

Cathy has six pairs of black gloves and six
pairs of brown gloves in her drawer.
In complete darkness, how many gloves must
she take from the drawer in order to be
sure to get a pair that match?
Think carefully!!

## July 28, 2008

### Why are manhole covers round?

Why is it better to have round manhole covers
than square ones?

## July 26, 2008

### Alphabet puzzle?

There are three words in the English language
that end in "gry". ONE is angry and the other
is hungry. EveryONE knows what the third ONE
means and what it stands for. EveryONE uses
them everyday, and if you listened very
carefully, I've given you the third word.
What is it? _______gry?

### Horse Problem

There are 25 horses and 5 race tracks.
We have to pick the fastest three horses in the
least no of races. PS: In one race only 5 horses
can participate. Find the least number of races?

## July 16, 2008

### Microsofts Puzzle

You have 5 jars of pills. Each pill weighs
10 gram, except for contaminated pills contained
in one jar, where each pill weighs 9 gm. Given
a scale, how could you tell which jar had the
contaminated pills in just one measurement?

## May 23, 2008

### What is the 9 digit number?

There is a 9 digit number.
Its speciality is no digit is repeated.
and its right 1 digit is divisible by 1 and
right 2 digits is divisible by 2,right 3 digits
is divisible by 3.This pattern will be repeated
until 9 digits.

find out the number.

## May 13, 2008

### The Missing Dollar Problem

Three friends went to a hotel. The bill was Rs \$75
Each one contributed \$25. The waiter took the bill to the cashier.
The cashier was happy & decided to give them a discount of
\$5 and asked the waiter to return them \$5.

Now the waiter was confused. How to distribute \$5 among 3
persons?

He kept \$2 in his pocket and gave \$1 to each one
of the 3 persons. So initially each one had contributed
\$25. Now as they are Given \$1 back, their contribution
reduces to \$24. They all contributed \$24. ie
24x3=72 and 2 dollors are in the waiters pocket.
The total becomes \$74. But they had paid \$75.
Where is the remaining \$1?

## April 30, 2008

### The Prisoner

A prisoner is faced with a decision where he must open one of two
doors. Behind each door is either a lady or a tiger. They may be
both tigers, both ladies or one of each.

If the prisoner opens a door to find a lady he will marry her and
if he opens a door to find a tiger he will be eaten alive.
Of course, the prisoner would prefer to be married than eaten alive.

Each of the doors has a sign bearing a statement that may be
either true or false. The statement on door one says,
"In this room there is a lady, and in the other room there is a tiger."

The statement on door two says, "In one of these rooms there is a
lady, and in one of these rooms there is a tiger."

The prisoner is informed that one of the statements is true
and one is false.

Which door should the Prisoner open?

## April 16, 2008

### Count the Number

On my way to the fair, I met 7 jugglers and a bear, every juggler
How many in all are going to the fair?

## March 24, 2008

### Monkey & Banana

A ten meter rope is looped through a pulley attached to the ceiling.
Half the rope dangles on one side, the other half on the other.
At one end of the rope is tied a one kilo bunch of bananas.
At the other end of the rope is a one kilo monkey.If the monkey
tries to climb the rope, what will happen?

### Einstein's Puzzle

FACTS OF THE PUZZLE
[This quiz was made up by Albert Einstein and
according to him 98% will not solve it.]

There are five houses in five different colours.
In each house lives a person of a different nationality.
These five owners drink a certain beverage, smoke a
certain brand of cigarette and keep a certain pet.
No owners have the same pet, smoke the same brand
of smoke or drink the same drink.

HINTS

1] The Brit lives in the red house.
2] The Swede keeps dogs as pets.
3] The Dane drinks tea.
4] The green house is on the left of the white house.
5] The green house owner drinks coffee.
6] The person who smokes Pall Mall rears birds.
7] The owner of the yellow house smokes Dunhill.
8] The man living in the house right in the center
drinks milk.
9] The Norwegian lives in the first house.
10] The man who smokes Blend lives next to the one
who keeps cats.
11] The man who keeps horses lives next to the man
who smokes Dunhill.
12] The owner who smokes Blue Master drinks beer.
13] The German smokes Prince.
14] The Norwegian lives next to the blue house.
15] The man who smokes Blend has a neighbour who
drinks water.
The question is: WHO OWNS FISH?

## March 13, 2008

### 4 Quarts

You have a 3-quart bucket, a 5-quart bucket, and an infinite
"supply of water. How can you measure out exactly 4 quarts?

### Two jars, 50 red marbles and 50 blue marbles ?

You have two jars and 100 marbles. Fifty of the
marbles are red, and 50 are blue. One of the jars will
be chosen at random, then 1 marble will be withdrawn
from that jar at random. How do you maximize the chance
that a red marble will be chosen? (You must place all 100
marbles in the jars.)What is the chance of selecting
a red marble when using your scheme?

### Four Dogs

There are four dogs, each at a corner of a large square.
Each of the dogs begins chasing the dog clockwise from it.
All of the dogs run at the same speed. All continuously
straight toward their clockwise neighbor. How long does it
take for the dogs to catch each other? Where does this
happen?

### Rectangular Cake

How do you cut a rectangular cake into two equal pieces when
someone has already removed a rectangular piece from it?
The removed piece can be pf any size or orientation.
You are allowed just one straight cut.

### Money puzzle

Mike and Todd have \$21 between them. Mike has \$20 more
than Todd. How much does each have?

### Water Level

If you are on a boat and toss a suitcase overboard,
will the water level rise or fall?

## March 8, 2008

### Microsoft's Puzzle2

How many points are there on the globe where, by walking one
mile south, one mile east, and one mile north,you reach
the place where you started?

### Microsoft's Puzzle

Why is it that, when you turn on the hot water in a hotel, the
hot water comes out instantly?

### Three Ants

There are three ants at the three corners of a regular
triangle. Each ant starts moving on a straight line toward
another, randomly chosen corner. What is the probability
that none of the ants collide?

## March 7, 2008

### 3 light switches

There are three switches in a hallway. One switch controls a
light fixture in a room at the far end of the hall. The door
to the room is closed, and you can't see whether the light
is on or off. You need to find out which of the three switches
controls the light. How can you be certain of finding that out,
making just one trip to the room?

### Fuse Problem

You have two lengths of fuse. Each will burn for exactly one
hour. But the fuses are not necessarily identical and do
not burn at a constant rate. There are fast-burning sections
and slow-burning sections. How do you measure forty-five
minutes using only the fuses and a lighter?

## March 6, 2008

### How Many Eggs

A woman was carrying a basket of eggs to market when a
passer-by bumped her. She dropped the basket and all
the eggs broke. The passer-by, wishing to pay for
I don't remember exactly, the woman replied, but I do
recall that whether I divided the eggs by 2,3,4,5 or 6
there was always one egg left over. When I took the
eggs out in groups of seven, I emptied the basket.

### Toffees

A boy has few toffees.he is about to eat them when
one of his friend comes and asks him to share.He divides
them equally into 2 parts without any toffee remaining.
Then one more boy comes so he divides into 3 equal parts
without any toffee remaining.Then one more boy comes so
he divides into 4 equal parts without any toffee remaining.
Then one more boy comes so he divides into 5 equal parts
without any toffee remaining.Then one more boy comes so
he divides into 6 equal parts without any toffee remaining.
Then one more boy comes so he divides into 7 equal parts
but one toffee remains.
HOW MANY TOFFEES DID THE BOY ORIGINALLY HAVE?

### Horse puzzles

There are 25 horses. In each race only 5 horses
can participate.How many races are required to select
best 5 horses out of 25?

### Box Match

The following numbers are made up of matchticks ("0" with 6 matchsticks,"1" with 3 etc...). Write a 4-digit number (without a leading 0) with the digits in the given matchstick forms, so that when this number is divided by the number of matchsticks it's formed of, the quotient is a whole number (0,1,2...) Maximise the quotient ?

Example

### The Peculiar Number

There is a number which is very peculiar. This
number is three times the sum of its digits. Can you
find the number?

## March 5, 2008

### Profit and loss problem

A man visits a gift shop and buys an article for Rs.80/-. He pays the shopkeeper a Rs.100/- note. The shopkeeper doesn't have any change. Thus he approaches his neighbouring shopkeeper and asks him for change. The neighbouring shopkeeper takes the Rs.100/- note and gives ten Rs.10/- notes to the shopkeeper. The shopkeeper then keeps eight(Rs.80/-) of the notes with him and returns the two(Rs.20/-) to the man. The man walks away with the article and Rs.20/-
After some time, the neighbouring shopkeeper finds that the Rs.100/- note is fake and asks for replacement with the shopkeeper. The shopkeeper with no other alternative gives his neighbour another 100 rupees. Now, what is the loss suffered by the shopkeeper?