NRICH: Clever Calculation
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
2017²−2015×2019
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
NRICH (University of Cambridge)
Math Topics
Addition & Subtraction, Quadratic Equations
High School
9th Grade, 10th Grade, 11th Grade
What are you looking for?
Organization
NRICH (University of Cambridge)
Website URL
Type of Resource
Challenge
Assigned Categories
Resource k12
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
2017²−2015×2019
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
NRICH (University of Cambridge)
Math Topics
Addition & Subtraction, Quadratic Equations
High School
9th Grade, 10th Grade, 11th Grade
What are you looking for?
Organization
NRICH (University of Cambridge)
Website URL
Type of Resource
Challenge