So I have functions which generate random examples but I need this functions to be random as well. thanks in advance ;)
public void generateExample()
{
    x = Random.Range(0, 10);
    y = Random.Range(0, 10 - x);
    _text.GetComponent<TextMesh>().text = x.ToString() + " + " + y.ToString() + " =";
    resultNum = x + y;
}
public void generateExample2()
{
    x = Random.Range(0, 10);
    y = Random.Range(0, x);
    _text.GetComponent<TextMesh>().text = x.ToString() + " - " + y.ToString() + " =";
    resultNum = x - y;
}