The words in #3 aren’t the most obvious examples of their category, imo. I only recognized one of the 4 words as even being in the category. I haven’t checked, but I think these words were used because most others in the category have multiple words rather than single words.

Place the digits 1 to 9 into the empty cells so that the three rows across and the three columns down form correct arithmetic statements. All calculations involve only positive whole numbers and should be performed from left to right and top to bottom, ignoring mathematical order of operations.