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Age 11 to 14 Short
Challenge Level
Using each of the numbers 1 to 9 once and once only, find two whole numbers, one of which is double the other.
Can you find more than one solution?
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.