Two containers: 3L and 5L. An immense supply of water. And a "weighted
"question: how to get exactly 4L of water with all of this? Can it be
solved at all?.. Yes, it can.
Numbered tiles (1 through N) form a square and are placed in it
line-by-line in ascending order starting from its top left corner. A
fragment of the square is shown. What is the size of the square?
Figuring out who is telling the truth and who is
lying had never been an easy task. And hardly will ever be. Especially
if the conclusion should be done based on the statements from the
persons being investigated.
Suppose you have an immense supply of wooden
cubes and several paint tins each containing a different color of
paint. How many differently painted cubes would you be able to produce
with such a toolkit?
The challenge posed by Lewis Carroll to a
teen-age girl in 1873 about how to reduce the area of a window in half
but at the same time keeping its height and width intact. Is the
problem still actual nowadays?
A solar spectrum consists of seven colors. A
triangular pyramid consists of four faces. The question is in how many
distinctive ways the pyramid can be painted using each time only the
colors from the solar spectrum?
How many minutes is it until X o'clock if Y
minutes ago it was N times as many minutes past Z o'clock? Will the
challenge sound less complicated when the variables are replaced with
the numbers?
Knowing the number of kisses and handshakes guests exchanged with each
other and with the hosts it is possible to answer how many of them arrived
at a dinner and if they arrived in couples or alone. Any ideas?
Read through five lines expressed in verse and try to come up with an
exact age of the Rose-Red city. Be careful and accurate while calculating
in order to avoid any mistake.
Each of the two jars has a capacity of 6 liters exactly. Supposing you
have an immense supply of water the task is to measure 4 liters using only
these two jars as measuring tools.
How to guess whether a certain region is inside a closed curve or outside
it when a part of the curve is not visible? Is there any clear and simple
method to do this?
It is said a cube can be easily cut into 27 smaller cubes with six straight cuts. Can
this number of necessary cuts be reduced by arranging the pieces after
each cut?
The four bugs standing in the corners of a square start to crawl one
toward each other. Here comes the question: How far does each bug travel
before they all meet?
Starting the way up at sunrise and starting the way down several days
after at sunrise too, is there a spot along the path that a monk will
occupy on both trips at precisely the same time of day?
The last names of Merle White, Leslie Black and Jean Brown don't match the
colors of their hair. From a little conversation between them can you
determine the color of Leslie Black's hair?
Another classic puzzle gem that should bring you an "aha!" no matter, if
you solve it by yourself or go right to the solution page. Enjoy the
beauty of the logical proof!
Try to figure out whose portrait hung on the wall in one man's library.
Just read carefully a strange verse about some persons and their
relationship...
Is it difficult to figure out the exact costs of two things when you know
their total cost and a difference only? Don't let the figures mislead you
while counting.
