I understood age context in this sentence. However, can it be used also when I am describing a group/collection that grew from , for example, five members/items to nine members/items?
What does this mean? I thought it meant 'they turned nine' as in they became another year older, but the answer is apparently 'they turned into nine'? Thanks.
I think "they turned nine" should be acceptable - I'll report it and see what happens