What are we learning ?
Competency in Focus: Divisibility.This problem from American Mathematics contest (AMC 8, 2016) is based on the concept of divisibility .
First look at the knowledge graph.
Next understand the problem
Source of the problem
American Mathematical Contest 2016, AMC 8 Problem 5
Start with hints
AMC - AIME Program
AMC - AIME - USAMO Boot Camp for brilliant students. Use our exclusive one-on-one plus group class system to prepare for Math Olympiad