Whether the verb with “number of” expressions takes a plural
verb or a singular verb depends on the article used: "the" or "a."
The expression the
number of (with the definite article “the”) has a singular meaning and
requires a singular verb.
But the expression a
number of (with the indefinite article “a”) has a plural meaning and
requires a plural verb.
A number of planes are lined up for takeoff.
The number of
protesters indicates dissatisfaction
with the proposed legislation.
A number of
protesters have indicated their
dissatisfaction with the proposed legislation.
Questions? You have my number!





