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Age 11 to 14 Short Challenge Level:
Three whole numbers, when added two at a time, give sums of 39, 48 and 51.
What is the largest of the three numbers?
This problem is taken from the World Mathematics Championships
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.