AMC A Lucky Number AMC 2007 Senior Q28 ByAnonymous Christian October 8, 2017October 8, 2017 Australian Mathematics Competition (AMC) 2007 Senior Question 28 A lucky number is a positive number which is 19 times the sum of its digits. How many different lucky numbers are there? *A possible solution in image below
A Maximum Among the Minimums – A Maximin Problem from AMC ByAnonymous Christian October 8, 2017October 8, 2017 Australian Mathematics Competition (AMC) 2007 Junior Question 30 Question: For any positive integer N, consider the digits…