Question 123
How many triples $(x, y, z)$ of 6 digit positive integers exists, such that all digits of $x, y, z$ are odd and $x + y = 10z$?
MathNet 2023-part-05 — 191 problems (EN–VI) Question 123
Math Olympiad Vault · MathNet 2023-part-05 — 191 problems (EN–VI)