NRICH: Find the Factor

Find a factor of 248−1.

2481  is divisible by two whole numbers between 60 and 70. Find the smaller of these.

This problem is taken from the World Mathematics Championships

You can find more short problems, arranged by curriculum topic, in our short problems collection.

Age 14 to 16


Algebra & Pre-Algebra, Quadratic Equations
High School

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NRICH (University of Cambridge)

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