Problems
Can't Find a Coin?
Stage: 3 Challenge Level: 
Can you generate a set of random results? Can you fool the random simulator?
Misunderstanding Randomness
Stage: 3 Challenge Level:
Which of these ideas about randomness are actually correct?
Which Spinners?
Stage: 3 Challenge Level:
Which spinners were used to generate these frequency charts?
Data Matching
Stage: 4 Short Challenge Level:
Use your skill and judgement to match the sets of random data.
Coin Lines
Stage: 4 Challenge Level:
If a coin rolls and lands on a set of concentric circles what is the chance that the coin touches a line ?
Introducing Distributions
Stage: 4 Challenge Level:
When five dice are rolled together which do you expect to see more often, no sixes or all sixes ?
Distribution Differences
Stage: 4 Challenge Level:
How could you compare different situation where something random happens ? What sort of things might be the same ? What might be different ?
Elsewhere...
Featured Solution
Zin Obelisk
This was a popular problem. Many of you managed to make sense of all that jumbled up information.
Articles & Games
From A Random World to a Rational Universe
In the time before the mathematical idea of randomness was discovered, people thought that everything that happened was part of the will of supernatural beings. So have things changed?
Distribution Maker
This tool allows you to create custom-specified random numbers, such as the total on three dice.
Quadruple Clue Sudoku
Four numbers on an intersection that need to be placed in the surrounding cells. That is all you need to know to solve this sudoku.
