NRICH: Clever Calculation

Find the shortcut to do this calculation quickly!

Without using a calculator, or performing any long multiplication calculations, find the value of

201722015×2019
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


Addition & Subtraction, Quadratic Equations
High School

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NRICH (University of Cambridge)

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