Forks (מזלגות) is one of the irregular plural nouns in Hebrew, i.e. nouns which have a different ending that doesn't correspond to their gender.
Check out this list for more irregular plural nouns : https://quizlet.com/6657379/hebrew-irregular-plural-nouns-flash-cards/
So in English, number is considered an adjective, or a modifier of some sort at least. If I say, "There are five blue birds.", five and blue are both words that describe the birds. So I guess I expected that numbers in Hebrew would be treated as adjectives, and would thus come after the noun like all the other adjectives in Hebrew. Is this not the case?
He might be. The questions do change and frequently the answer shown on the discussion page is not the answer to the exercise I have completed. I can't speak to what I can't see. (In this limited instance I will point out he's also doing the English tree, so it might be to his benefit regardless of the direction of the translation (English to Hebrew or the reverse). (Pardon the awkward phrasing - I'm just waking up... )