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Biscuit Decorations
Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?
Age 5 to 7
Challenge Level
Here are some pictures of people taking part in Olympic throwing events.
The first one shows a man throwing a hammer and the second shows a woman throwing a discus.
They can throw them a long way. A recent Olympic record for throwing the hammer was about 80 adult strides and for throwing the discus was about 70 adult strides.
How far do you think you can throw a beanbag?
What would your estimate be? (When you estimate, you use what you already know to make a guess.)
Have a go!
How did your real throw compare with your estimate?
The hammer throwing photograph was taken by Phil Sussman and the discus throwing photograph was taken during the 2017 Canada Summer
Games. Both are reproduced under a Creative Commons license.
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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.