Task 348
Task 348: test task in emrekuruu/math-openenv, an RL environment on the Hugging Face Hub. When the single digit $D$ is written at the end of the positive two-digit integer $XY$, with tens digit $X$ and ones digit $Y$, the resulting positive three-digit integer $XYD$ is 619 more than the original…
The task
When the single digit $D$ is written at the end of the positive two-digit integer $XY$, with tens digit $X$ and ones digit $Y$, the resulting positive three-digit integer $XYD$ is 619 more than the original integer $XY$. What is the value of the three-digit integer $XYD$?