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Age 14 to 16 Short
Challenge Level
Ruth has glued 2009 unit cubes together to form a cuboid.
She opens a pack containing 2009 stickers, and she has more than enough to place one sticker on each exposed face of each unit cube.
How many stickers does she have left?
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
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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.