Miss Atkinson stayed back in school to do some marking. If she had marked $$4$$ questions in a minute, she would leave the school $$5$$ minutes late. If she had marked $$6$$ questions in a minute, she would leave the school $$5$$ minutes early. How many questions did she mark before she left the school? 
Overseas Competition->Knowledge Point->Word Problem Modules->Distribution Problems->Basic Distribution Problems