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Bat Wings

Two students collected some data on the wingspan of bats, but each lost a measurement. Can you find the missing information?

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Kate's Date

When Kate ate a giant date, the average weight of the dates decreased. What was the weight of the date that Kate ate?

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Balancing the Books

How many visitors does a tourist attraction need next week in order to break even?

Half a Minute

Age 11 to 14 Challenge Level:
You could perhaps work out some different types of average for the three sets of data, and then think about which is most appropriate to use.