I'm with Rivka, some isn't used refer to any specific number of objects in group.

I shall now quote from my grammar bible (which is Swan's 'Practical English Usage' - I like it because it has pretty colours in it)...

"Some is a determiner. If often suggests an indefinite quantity or number, and is used to when it is not important to say exactly how much/many we are thinking of."

I don't always agree with books, but I do on this smile I can't really think of a situation where some could mean 6...

Helga
(The difference between some/any being one of the many English grammar points that she can teach wink )

Knowledge is knowing that tomatoes are a fruit.

Intelligence is not putting them in a fruit salad.