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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?

Range of Averages

Age 11 to 14 Short Challenge Level:

12 is the mode, so 12 must appear at least twice.

The median, 14, is half way between the two middle numbers when listed in order of size. So the 12s must be below the median, since the median is greater than 12.

12, 12     ,      

14 is half way between 12 and 16, so the next number is 16.

12, 12, 16     

The last number must be 22, so that the range is 10.

12, 12, 16, 22

You can find more short problems, arranged by curriculum topic, in our short problems collection.