We can arrange four 5's to produce one hundred quite easily, using some
arithmetical signs. The question is how easy it is to arrange four 7's to
obtain the same result?
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.
Seven matchstick triangles are scattered around in quite a chaotic order.
How to move just three matchsticks so that an additional triangle would
appear?
Bet not every day you see a challenge to divide a regular dodecagon into a
set of pieces which can be then rearranged to create a perfect square.
Would you dare to give it a try?
The Egg consists of differently colored parts.
Which is bigger - the total area of the light parts (yellow tones) or
the total area of the dark parts (blue tones)?
There is one Sun and eight planets in this puzzle. And your goal is to
supply each planet with its portion of light - exactly one ray per planet.
Enjoy and relax!
Two lines are drawn on the two
sides of a cube. They are drawn form the same corner and the question is
which angle do these lines form? How to figure that out?
The shape consists of 7 blocks. Which is bigger -
the total volume of the red blocks, the total volume of the blue
blocks, or the total volume of the yellow blocks?
How many right isosceles triangles of any size
and orientation can you find in the shape? To count, the triangle must
have three coins placed exactly at its respective corners. One
triangle is already shown.
Put a set of nine jigsaw-like pieces into a special grid. A distinctive
feature of the challenge is that there is a definite logical place and
order for each piece to be located within the grid. The goal is only to
discover it!
