The article is the key
Posted by ESC on June 05, 2004
In Reply to: There is or There are ...? posted by R. Berg on June 05, 2004
: : : Which of the above is correct or either one is fine?
: : Are. "Number" is plural.
: Um, well, "number" is singular, but "are" is correct.
A little clarification from the Chicago Manual of Style:
Number as a collective noun takes a singular or plural verb depending on the article (definite "the" or indefinite "a") that precedes it:
THE number of pizzas ordered this year has doubled.
but
A number of studies have shown that stuffing a pizza with spinach triples the edibility of that sinewy vegetable.