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problem
Pieces of eight
11 to 14
Two of the triangles in the diagram are shaded black. What is the probability the resulting figure has at least one line of symmetry?
problem
Two girls
14 to 16
There are 10 girls in a mixed class. If two pupils are selected, the probability that they are both girls is 0.15. How many boys are in the class?
problem
Favourite
Chances are
14 to 16
Which of these games would you play to give yourself the best possible chance of winning a prize?
problem
Favourite
What does random look like?
11 to 14
Engage in a little mathematical detective work to see if you can spot the fakes.
problem
Favourite
Scale invariance
16 to 18
By exploring the concept of scale invariance, find the probability
that a random piece of real data begins with a 1.
article
Con tricks
Here are some examples of 'cons', and see if you can figure out where the trick is.