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 24, 2008

## October 20, 2008

### Logic Puzzles

You've been asked to buy 100 squeegies, using 100

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?

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?

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)?

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.

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.

### 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?

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?

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

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 bellboy to return to the people. On the way 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?

manager and go to their room. The manager suddenly

remembers that the room rate is £25 and gives £5 to

the bellboy to return to the people. On the way 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?

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