divisibility

The fun Prove that if \(x\) and \(y\) are positive integers such that \(x + y = 2019\), then \(x \cdot y\) is not divisible by \(2019\). Prove that the same is true for any […]

The workings Now that the year 2019 is halfway through, it is time to propose an amusement in which this number is the leading character. On this occasion, the idea is to separate the number […]