500
Helen decided to watch a lot of movies in summer. Her mom said that for every movie she watches, she owes her mom one hour to babysit her little brother. For first 3 days, she watched 3 movies every day, then next day, she watched 2 movies, and she decided to watch 1 movie daily for 2 more weeks. How many hours dose Helen owe her mom to babysit?
What is 25 hours?