Art of Problem Solving

2019 AIME I Problems/Problem 1

Problem 1

What is the sum of the digits of $9+99+999+...+99..99$ (321 9's)?

Solution

2019 AIME I (ProblemsAnswer KeyResources)
Preceded by
First Problem
Followed by
Problem 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
All AIME Problems and Solutions

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