You may also like
Bat Wings
Two students collected some data on the wingspan of bats, but each lost a measurement. Can you find the missing information?
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?
Balancing the Books
How many visitors does a tourist attraction need next week in order to break even?
Age 11 to 14 Short Challenge Level:
The average temperature in 6 European cities is 5$^\circ$ Celsius.
What is the new average temperature, if two more cities, with temperatures of 12$^\circ$ Celsius and $-$6$^\circ$ Celsius, are added to the list?
This problem is adapted from the World Mathematics Championships
You can find more short problems, arranged by curriculum topic, in our short problems collection.
Copyright © 1997 - 2020. University of Cambridge.
All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.