If you were to generalize brain tumors, and not focus on a single type but all of them, from 1 - 10, is it curable?

Depends: Very difficult question. Much depends on whether the patient is a child or adult, and the tumor a primary brain tumor or a metastasis and whether the patient as a syndrome. As a general rule, tumors that are within the skull but outside the brain (known as extra-axial) are benign and usually amenable to surgical excision. Tumors that are truly inside the brain tend to be malignant.