Which is correct:
A number of suggestions were given.
or
A number of suggestions was given.
????
were
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A number of suggestions were/was given.
The short answer is that plural were is right.
As used in your example, number is a non-count quantificational noun. It is 'number-transparent' in the sense that the verb-form is determined not by the head of the noun phrase, the singular noun number, but by the noun that is complement to the preposition of
thank you!
"Were" sounded right but I confused myself by looking at "a number" as singular .