Mathematics is a bit of a funny one. I guess most US people would say "the math is easy" and most UK people would say "the maths are easy".
:doh: I stand corrected; and I can see a parallel case with certain other nouns. I think that the great majority of English speakers on both sides of the Atlantic would say (I mean as far as conjugation is concerned), "Politics is interesting" rather than *"Politics are interesting"; but if the subject is not the noun "politics" but rather, e.g., "
his politics," I think that there would be more who would use "are" rather than "is." The pertinent distinction is between talking about the subject in general ("math(ematic)s," "politics") and talking about some particular manifestation or variety of it ("the maths," "his politics").
[Removed some stuff because it was confused and wrong. Damn!]
Uncountable nouns (rice, money etc) - aren't they good?
Who says that they are not "good"? Good for what, or in what respect?
By the same token, who would say "the data is accurate" vs who would say "the data are accurate"? The latter phrase is technically correct but would be viewed as "affected" if you used it on anyone who doesn't give a shit!
People who know that "data" is the plural of "datum," the past participle of the Latin verb "dare," are likely to treat the noun in English as a plural form; everybody else -- the vast majority, of course -- uses it as a singular non-count noun.