Averages

There are 41 NRICH Mathematical resources connected to Averages
Unequal Averages
problem
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Unequal averages

Age
11 to 14
Challenge level
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Play around with sets of five numbers and see what you can discover about different types of average...
Half a minute
problem
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Half a minute

Age
11 to 14
Challenge level
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Anna, Ben and Charlie have been estimating 30 seconds. Who is the best?
Wipeout
problem
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Wipeout

Age
11 to 16
Challenge level
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Can you do a little mathematical detective work to figure out which number has been wiped out?
About Average
problem
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About average

Age
11 to 14
Challenge level
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Can you find sets of numbers which satisfy each of our mean, median, mode and range conditions?
problem
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Birdwatch

Age
7 to 11
Challenge level
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Have a look at this data from the RSPB 2011 Birdwatch. What can you say about the data?

Statistical shorts
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Statistical shorts

Age
11 to 16
Challenge level
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Can you decide whether these short statistical statements are always, sometimes or never true?
m, m and m
problem
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M, M and M

Age
11 to 14
Challenge level
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If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?

Searching for mean(ing)
problem
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Searching for mean(ing)

Age
11 to 16
Challenge level
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If you have a large supply of 3kg and 8kg weights, how many of each would you need for the average (mean) of the weights to be 6kg?
For richer for poorer
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For richer for poorer

Age
14 to 16
Challenge level
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Charlie has moved between countries and the average income of both has increased. How can this be so?
How would you score it?
problem
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How would you score it?

Age
11 to 14
Challenge level
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Invent a scoring system for a 'guess the weight' competition.