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problem
In a box
Chris and Jo put two red and four blue ribbons in a box. They each pick a ribbon from the box without looking. Jo wins if the two ribbons are the same colour. Is the game fair?
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problem
Two's company
Seven balls are shaken. You win if the two blue balls end up touching. What is the probability of winning?
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problem
Cosy corner
Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?
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problem
Substitution cipher
Find the frequency distribution for ordinary English, and use it to help you crack the code.
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problem
Sociable cards
Move your counters through this snake of cards and see how far you can go. Are you surprised by where you end up?
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problem
Last one standing
Imagine a room full of people who keep flipping coins until they get a tail. Will anyone get six heads in a row?
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problem
What does random look like?
Engage in a little mathematical detective work to see if you can spot the fakes.
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problem
Perception versus reality
Infographics are a powerful way of communicating statistical information. Can you come up with your own?
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problem
Wipeout
Can you do a little mathematical detective work to figure out which number has been wiped out?
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problem
Unequal averages
Play around with sets of five numbers and see what you can discover about different types of average...
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problem
M, M and M
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?