A riddle for intelligent and patient people
Puzzles for the sharp-minded and patient. Trickier than it seems: these eleven puzzles with strings, boards, and rings are challenging. One of them cannot be…
A Table with loose Legs
Three, two, one – stable. How many supports do we need to stabilize a tabletop? Without screws, without glue, of course. Sharp-minded (and experimental)…
Ball sorting machine
Playful tidying up. Yellow. Red. Blue. This machine sorts the small, medium, and large balls among Pierre Andrès' “Machines Singulières” in a playful manner.…
Break the code
Qxpoa gvp pbuu: Cryptography. An encrypted text appears on the monitor. The challenge is to decrypt it with as few errors as possible. But there are over four…
Conway Cube
Test your spatial imagination. Assemble nine pieces to form a cube. Three 1x1x1 cubes and six 2x2x1 cuboids. It seems simple, what the renowned British…
Disappearing Ghost
The ghost disappears. Where did it go? The ghost reappears. Where did it come from? A puzzle made of three parts: one base element, two pieces to swap. How…
Do they fit in the Box?
Too big. Or is it? The cube fits into the glass cube. Clear enough. But the pyramid, the star-shaped object? Too big. Some objects appear larger than they…
Efron’s Dice
Loaded dice. The numbers on the faces of these four dice are nothing like what we’re used to. And they really get your brain working. The first player picks…
Encoding Text - Caesar’s disc
« Caesar’s Wheel » Encoding and decoding with two rows of letters that can be shifted relative to each other. Even in Caesar’s time, information was protected…
Find the Fish!
Fits, from head to fins. The fish, the wire frame next to the image, fits in only one spot into the pattern with the "water lilies." The pattern with many…
Lights ON
Seven lights, seven buttons. The goal: make all seven lights turn on – or none at all. Pressing a button affects three lights and causes a state change: from…
Penrose Parquet
Aperiodic pattern. In the aperiodic Penrose tiling, subpatterns repeat irregularly, even though shapes like hexagons or stars appear throughout. Using only…
Quasi-Crystals
Golden rhombohedra. When correctly assembled, the various bodies (cubes stretched along their diagonals and cubes compressed along their diagonals) form a…
Rhombo Puzzle
Rhombo-dodecahedron from parallelepipeds. Twelve building blocks (each consisting of two connected parallelepipeds) can be assembled to form a…
Soma Cube
7 pieces = 1 cube. Each of the seven components of this large cube is a polycube. This means each piece consists of several small cubes. Spatial imagination…
Square Puzzle and the Square to Triangle-Conversion
Disassemble and reassemble – discrete geometry. Square puzzle: Nine square tiles of different sizes. Arranged correctly, they fit into an almost-square…
T-Puzzle
Frustratingly simple. Four pieces make up a puzzle. When placed correctly, they form the letter T. Child’s play. But: is this task really that easy?
Template Code
Untangling the letter jumble. Perfectly possible, with the right template. Using it in reverse, you can encrypt a 36-letter message, almost impossible for…
Tetrahedron Puzzle I
Three-sided pyramid, puzzle with two pieces. Spatial imagination is required: when correctly combined, these two equally sized bodies form a…
Tetrahedron Puzzle II
Three-sided pyramid, puzzle with four pieces. Spatial imagination is required: when correctly combined, these four equally sized bodies form a…
Tetrahedron Puzzle III
This puzzle game is mainly about spatial imagination. Four (2 equal) bodies made of spheres are to be assembled to form a tetrahedron.
Towers of Hanoi
Rearranging – how many moves does it take? Five disks stacked on a pole, arranged from largest to smallest. These five disks need to be moved to one of the…
Wolf, Goat and Cabbage
Keep calm, ferryman! Task: transport cabbage, goat, and wolf to the other side of the river. Tricky, since only one other passenger fits on the ferry. The…
CSI Technorama – forensics
Regardless of whether it is a burglary, an accident or a felony, crime scene investigations always begin with securing the evidence. Are there fingerprints?…
Happy hour on the ISS – water purification
Even astronauts on the International Space Station ISS enjoy drinking a Campari Soda from time to time – but where do they get the soda water from? There is no…
Lighting effects in nature and the home – fluorescence
How can you light up fluorescent objects? Where do lighting effects occur? You extract fluorescent dyes from everyday objects like pudding mixes or laundry…
Acoustics
Aggregate states
Algorithms
Animals, plants, habitats
Atomic and quantum physics
Atomic structure
Automats
Biology
Buoyancy
Chaos
Characteristics of life
Chemical Reactions
Chemistry
Colors
Computer science
Cryptology
Currents
Data and information
Design elements
Earth sciences
Electricity
Electricity and energy
Electricity and magnetism
Elektromagnetismus
