MathDB
1 piece of 1 , 2 pieces of 1 , 3 pieces of 3 , . . . , 50 piecies of 50

Source: (2022-) 2023 XVI 16th Dürer Math Competition Finals Day 2 E4

May 25, 2024
algebra

Problem Statement

Benedek wrote down the following numbers: 11 piece of one, 22 pieces of twos, 33 pieces of threes, ...... , 5050 piecies of fifties. How many digits did Benedek write down?