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Given are 12 marbles. One of these marbles is slightly heavier or lighter
than the others. You have a two plate scale. You are allowed to weigh three
times.
Can you find the marble that differs in weight?
There are four man standing in front of a firing-squad. Two of them (nr.1
& 3) wear a black hat and two of them (nr.2 & 4) wear a white hat. They
are all facing the same direction and between nr.3 and nr.4 stands a brick wall
(see picture). So nr.1 can see nr.2 & 3, nr.2 sees nr.3, nr.3 sees only the
wall and nr.4 doesn't see a thing. The men know that there are two white and two
black hats.
The commander of the firing-squad is willing to let the men go if
one of them can say what color hat he is wearing. The men are not allowed to
talk. The only thing they may say is "I'm wearing a white/black hat". If one of
the men knows which hat he is wearing he must tell it and all men will be
free.
Which man knows 100% sure what color hat he's wearing?
=> I I I | I 1 2 3 4
A farmer is standing on one side of the river and with him are a wolf, a goat
and a box with cabbages. In the river there is a small boat. The farmer wants to
cross the river with all the three items who are with him. There are no bridges
and in the boat there is only room for the farmer and one item. But if he leaves
the goat with the cabbages alone on one side of the river the goat will eat the
cabbages. If he leaves the wolf and the goat on one side the wolf will eat the
goat. Only the farmer can seperate the wolf from the goat and the goat from the
cabbage.
How can the farmer cross the river with all three items,
without one eating the other ?
You are lost in a forest. The forest is between two villages. In village A
live only liars, they always lie. In village B people always tell the truth. You
want to go to village B. Then you see a man from village A or B. You can ask him
only one question.
Which question will you ask him to know for sure where
village B is ?
A butcher goes to the market with $100 cash. He has to buy exactly 100
animals. There are cows, geese and chicken for sale. A cow costs $15, a goose is
$1 and a chicken costs $0.25. He has to buy at least one of each animal and has
to spend all his money.
A fool wants to tie a rope around the earth. So he buys a rope of 40,000 KM
and ties it around the world. His neighbour, also a fool, wants to do the same
only he wants the rope on sticks 1 meter above the ground.
A mother is four times as old as her daughter. In 20 years she will be twice
as old as her daughter.
Achmed and Ali are camel-drivers and on one day they decided to quit their
job. They wanted to become shepherds. So they went to the market and sold all
their camels. The amount of money(dinars) they received for each camel is the
same as the total of camels they owned. For that money they bought as many sheep
as possible at 10 dinars a sheep. For the money that was left they bought a
goat.
On their way home they got in a fight and decided to split up. When
they divided the sheep there was one sheep left. So Ali said to Achmed "I take
the last sheep and you can get the goat". "That's not fair" said Achmed, "a goat
costs lesser than a sheep". "Ok", Ali said "then I will give you one of my dogs
and then we are even". And Achmed agreed.
What costs a dog?
With a field of five for the west wessex marathon race, there was little to
interest the bettors. So, Peter Piper opened one of his ingeneous books where he
accepts multiple bets at high odds. To place a multiple bet, you must bet on two
propositions, and you will win only if you are wholly successful. Peter Piper is
now on an extended vacation because of the bettors who lost these
bets:
1) A will not win the gold, nor B the silver.
2) C will win a
medal, and D will not.
3) D and E will both win medals.
4) D will not win
the silver, nor E the bronze.
5) A will win a medal, and C will
not.
Who won which of the medals?
Five people visit a bar for a drink of Scotch Whisky. They all have their drink served differently and by different bar staff. From the clues given below, can you work out which bar person served whom, how they had their Scotch and in what order they were served at the bar.
Someone is
served a Scotch & Cola by Carmen.
Mrs Johnson was
not served her Scotch & Ginger Ale by Marcella.
Mr Weiss was
served by Paul.
The person who drinks Scotch & Cola wasn't served second.
The cocktail
drinker was served last.
Marcella
served the fourth person in line but they didn't order a Scotch & Soda.
Neither Carmen
nor Hans served Mr Petit who was third in line at the bar.
First in line
was not Miss La Rue.
Drinkers; Weiss, Muller, Petit, Johnson, La Rue
Servers; Paul, Carmen, Hans, Marcella,
Andy
Drinks; (Scotch &) Cola, Gingerale, Ice,
Soda, Cocktail
Order served; first second, third, fourth, fifth
U2 has a concert that starts in 17 minutes and they must all cross a bridge
to get there. All four men begin on the same side of the bridge. You must help
them across to the other side. It is night. There is one flashlight. A maximum
of two people can cross at one time. Any party who crosses, either 1 or 2
people, must have the flashlight with them. The flashlight must be walked back
and forth, it cannot be thrown, etc. Each band member walks at a different
speed. A pair must walk together at the rate of the slower man's pace:
Bono:-
1 minute to cross
Edge:- 2 minutes to cross
Adam:- 5 minutes to
cross
Larry:- 10 minutes to cross
For example: if Bono and Larry walk
across first, 10 minutes have elapsed when they get to the other side of the
bridge. If Larry then returns with the flashlight, a total of 20 minutes have
passed and you have failed the mission.
Can you get them across in 17
minutes?
There are five different houses.
Each house has its own color.
Each
house has a man of a different nationality.
Each man drinks a different
drink.
Each man has a differnt pet.
Each man smokes a different
cigarette.
The Englishmen lives in the red house.
The Swede has a
dog.
The Dane drinks tea.
The Green house is on the left side of the white
house.
The man in the green house drinks coffee.
The man that smokes Pall
Mall has birds.
The man in the yellow house smokes Dunhills.
The man in
the middle house drinks milk.
The Norwegian lives in the first house.
The
man that smokes Blends lives in the house next to the house with cats.
The
man in the house next to the house with the horse, smokes Dunhills.
The man
who smokes Blue Masters drinks beer.
The German smokes Princes.
The
Norwegian lives next to the blue house.
Water is drank in the house next to
the house where Blends are smoked.
Who owns the zebra?
Click here for a logic puzzle
solver.
The puzzle you are about to see is a miracle. I know that some landowners
will be very pleased to know that they can increase there property by dividing
it in the following pieces.
Click here to see the miracle.
You have fifty bags, each with approximately one hundred balls inside. You
have a weighing machine with a digital readout, with 3 places of decimals on the
display, calibrated in grams, it is capable of weighing an infinite amount (but
it won't have to).
All of the balls in all of the bags weigh 1 gram, except
in one bag in which all of the balls weigh 1.001 grams.
You cannot tell by
look or feel which bag has the heavier balls.
How do you determine which
bag contains the heavier balls? You can use the weighing machine only once
(which means you can obtain only one reading from it before it self
destructs).
Two strangers from different parts of America both build simular apartment
buildings in their home towns. By chance, they both forget an important part of
thier project. They each, once again by chance, call the same national hardware
store and order the missing items. The prices they are quoted are as
follows:
one will cost them $2.
two will cost them $2.
twelve will
cost them $4.
and a hundred and fourty-four will cost $6.
What was the
item they needed?
Three grainsilos have the following capacity:
A 8000 kilos
B 5000
kilos
C 3000 kilos
A is full, B and C are empty.
Can you
without weighing put 4000 kilos in silo A and 4000 kilos in silo B?
A clock strikes '6' in 5 seconds.
How long does it take to strike
'12'?
During the lunch hour at school, a group of five boys from Miss Jones home
room visited a nearby lunch wagon. one of the five boys took a candy bar without
paying for it. When the boys were questioned by the school principal, they made
the following statements in respective order:
1. Rex: "Neither Earl nor I did
it."
2. Jack: "It was Rex or Abe."
3. Abe: "Both Rex and Jack are
lying."
4. Dan: "Abe's statement is not true; one of them is lying and
the other is speaking the truth."
5. Earl: "What Dan said is
wrong."
When Miss Jones was consulted, she said, "Three of these boys are
always truthful, but everything that two of them say will be a lie." Assuming
that Miss Jones is correct, can you determine who took the candy bar?
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