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Regional Olympiad - FBH 2012 Grade 9 Problem 3

Source: Regional Olympiad - Federation of Bosnia and Herzegovina 2012

September 25, 2018
remaindernumber theory

Problem Statement

Find remainder when dividing upon 20122012 number A=1⋅2+2⋅3+3⋅4+...+2009⋅2010+2010⋅2011A=1\cdot2+2\cdot3+3\cdot4+...+2009\cdot2010+2010\cdot2011
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