maybe 5 i dont know
maybe 6 or 7 or1 or2 or3 or 4 or 8 or 9 or 10
simply means the subject and verb must agree in number. this means both need to be singular or both need to be plural.
that is the answer
according to our rules don't confuse your question is not acceptable we can't say how many are here in f you don't want to judge by people be responsible : )