Question 15
What is the units digit of $1^2-2^2+3^2-4^2+\cdots-2008^2+2009^2$?
IKMC 2009 - Grades 11-12 - Paper 02 - Self-study Question 15
IKMC · IKMC 2009 - Grades 11-12 - Paper 02 - Self-study
IKMC · IKMC 2009 - Grades 11-12 - Paper 02 - Self-study