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

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

Wipeout

Age 11 to 16 Challenge Level:

If you know what the average is, and how many numbers you have, what can you say about the total?