The number of+複數名詞+單數動詞

The number of students who want to buy this dictionary is increasing.
the number of+複數名詞+單數動詞,所以want是不是要改成wants??
Update: Louis 請問那The number of traffic accidents increases sharply.
這句The number of traffic addicents是主詞?
Update 2: 不好意思再請問一下 None of the ideas is good.
ideas是複數名詞,為甚麼後面接單數動詞
3 answers 3