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Mediant Madness

Kyle and his teacher disagree about his test score - who is right?

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Marathon Mission

Minnie trained more for the London Marathon this year, so her speed increased. By what percentage did her time decrease?

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Tyneside Average Speed

Can you work out the average speed of the van?

For Richer for Poorer

Age 14 to 16 Challenge Level:

Try starting with a specific example.

e.g.
Group A is composed of people aged 2, 7, 11, 14 and 16 (average 10)
Group B is composed of people aged 5, 11, 12, 13 and 19 (average 12)

Investigate what happens to the averages when different members move from one group to the other.