MathDB
2020 MOAA Theme Optimization TO 3

Source:

January 23, 2022
number theorytheme2020

Problem Statement

Consider the addition \begin{tabular}{cccc} & O & N & E \\ + & T & W & O \\ \hline F & O & U & R \\ \end{tabular} where different letters represent different nonzero digits. What is the smallest possible value of the four-digit number FOURFOUR?