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Ding Dong Bell
The reader is invited to investigate changes (or permutations) in the ringing of church bells, illustrated by braid diagrams showing the order in which the bells are rung.
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2 out of 3
More Adventures With Modular Arithmetic
14 to 18
2 out of 3
Investigate what happens when we add or multiply numbers using modular arithmetic.
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3 out of 3
Guessing the Graph
14 to 16
3 out of 3
Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?
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2 out of 3
Favourite
For Richer for Poorer
14 to 16
2 out of 3
Charlie has moved between countries and the average income of both has increased. How can this be so?
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3 out of 3
Favourite
Over-Booking
16 to 18
3 out of 3
The probability that a passenger books a flight and does not turn up is 0.05. For an aeroplane with 400 seats how many tickets can be sold so that only 2% of flights are over-booked?
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1 out of 3
Colour Wheels
7 to 11
1 out of 3
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
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2 out of 3
Winning the Lottery
7 to 11
2 out of 3
Find out about the lottery that is played in a far-away land. What is the chance of winning?
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2 out of 3
Bean Bags for Bernard's Bag
7 to 11
2 out of 3
How could you put eight bean bags in the hoops so that there are four in the blue hoop, five in the red and six in the yellow? Can you find all the ways of doing this?
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1 out of 3
Swimming Pool Tiles
7 to 11
1 out of 3
This activity creates an opportunity to explore all kinds of number-related patterns.
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1 out of 3
Favourite
Making Sticks
5 to 7
1 out of 3
Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?