{
  "title": "Elapsed Time Problems - Grade 4 CBSE",
  "total_questions": 100,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "If a movie starts at 3:00 PM and ends at 4:30 PM, how long is the movie?", "options": {"A": "1 hour", "B": "1 hour 15 minutes", "C": "1 hour 30 minutes", "D": "2 hours"}, "correct_answer": "C"},
    {"id": 2, "difficulty": "easy", "question": "School starts at 8:00 AM and ends at 2:00 PM. How long is school?", "options": {"A": "4 hours", "B": "5 hours", "C": "6 hours", "D": "7 hours"}, "correct_answer": "C"},
    {"id": 3, "difficulty": "easy", "question": "If you start reading at 4:00 PM and read for 1 hour, when do you finish?", "options": {"A": "4:30 PM", "B": "5:00 PM", "C": "5:30 PM", "D": "6:00 PM"}, "correct_answer": "B"},
    {"id": 4, "difficulty": "easy", "question": "Lunch break is from 12:00 PM to 1:00 PM. How long is lunch?", "options": {"A": "30 minutes", "B": "45 minutes", "C": "1 hour", "D": "1 hour 15 minutes"}, "correct_answer": "C"},
    {"id": 5, "difficulty": "easy", "question": "If a game starts at 2:30 PM and lasts 2 hours, when does it end?", "options": {"A": "3:30 PM", "B": "4:00 PM", "C": "4:30 PM", "D": "5:00 PM"}, "correct_answer": "C"},
    {"id": 6, "difficulty": "easy", "question": "You sleep from 9:00 PM to 6:00 AM. How long do you sleep?", "options": {"A": "8 hours", "B": "9 hours", "C": "10 hours", "D": "11 hours"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "If class starts at 9:15 AM and ends at 10:00 AM, how long is class?", "options": {"A": "30 minutes", "B": "45 minutes", "C": "1 hour", "D": "1 hour 15 minutes"}, "correct_answer": "B"},
    {"id": 8, "difficulty": "easy", "question": "A TV show runs from 5:00 PM to 5:30 PM. How long is the show?", "options": {"A": "15 minutes", "B": "30 minutes", "C": "45 minutes", "D": "1 hour"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "If you start homework at 4:00 PM and work for 45 minutes, when do you finish?", "options": {"A": "4:30 PM", "B": "4:45 PM", "C": "5:00 PM", "D": "5:15 PM"}, "correct_answer": "B"},
    {"id": 10, "difficulty": "easy", "question": "Breakfast takes 20 minutes. If you start at 7:30 AM, when do you finish?", "options": {"A": "7:45 AM", "B": "7:50 AM", "C": "7:55 AM", "D": "8:00 AM"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "A car trip starts at 10:00 AM and ends at 11:30 AM. How long is the trip?", "options": {"A": "1 hour", "B": "1 hour 15 minutes", "C": "1 hour 30 minutes", "D": "2 hours"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "If practice starts at 3:45 PM and lasts 1 hour, when does it end?", "options": {"A": "4:30 PM", "B": "4:45 PM", "C": "5:00 PM", "D": "5:15 PM"}, "correct_answer": "B"},
    {"id": 13, "difficulty": "easy", "question": "You play outside from 4:00 PM to 5:15 PM. How long do you play?", "options": {"A": "1 hour", "B": "1 hour 15 minutes", "C": "1 hour 30 minutes", "D": "1 hour 45 minutes"}, "correct_answer": "B"},
    {"id": 14, "difficulty": "easy", "question": "If dinner starts at 6:30 PM and ends at 7:15 PM, how long is dinner?", "options": {"A": "30 minutes", "B": "45 minutes", "C": "1 hour", "D": "1 hour 15 minutes"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "A meeting lasts 2 hours. If it starts at 1:00 PM, when does it end?", "options": {"A": "2:00 PM", "B": "2:30 PM", "C": "3:00 PM", "D": "3:30 PM"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "You study from 5:00 PM to 6:30 PM. How long do you study?", "options": {"A": "1 hour", "B": "1 hour 15 minutes", "C": "1 hour 30 minutes", "D": "2 hours"}, "correct_answer": "C"},
    {"id": 17, "difficulty": "easy", "question": "If a party starts at 2:00 PM and lasts 3 hours, when does it end?", "options": {"A": "4:00 PM", "B": "4:30 PM", "C": "5:00 PM", "D": "5:30 PM"}, "correct_answer": "C"},
    {"id": 18, "difficulty": "easy", "question": "You watch a movie from 7:00 PM to 8:45 PM. How long is the movie?", "options": {"A": "1 hour 30 minutes", "B": "1 hour 45 minutes", "C": "2 hours", "D": "2 hours 15 minutes"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "If you start cleaning at 10:00 AM and work for 2 hours, when do you finish?", "options": {"A": "11:00 AM", "B": "11:30 AM", "C": "12:00 PM", "D": "12:30 PM"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "A concert starts at 6:30 PM and ends at 8:00 PM. How long is the concert?", "options": {"A": "1 hour", "B": "1 hour 15 minutes", "C": "1 hour 30 minutes", "D": "2 hours"}, "correct_answer": "C"},
    
    {"id": 21, "difficulty": "medium", "question": "If you start a test at 9:15 AM and finish at 10:45 AM, how long did you take?", "options": {"A": "1 hour 15 minutes", "B": "1 hour 30 minutes", "C": "1 hour 45 minutes", "D": "2 hours"}, "correct_answer": "B"},
    {"id": 22, "difficulty": "medium", "question": "A train leaves at 8:20 AM and arrives at 11:45 AM. What is the travel time?", "options": {"A": "3 hours 15 minutes", "B": "3 hours 25 minutes", "C": "3 hours 35 minutes", "D": "3 hours 45 minutes"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "If you start cooking at 5:30 PM and the food takes 1 hour 15 minutes, when is it ready?", "options": {"A": "6:30 PM", "B": "6:45 PM", "C": "7:00 PM", "D": "7:15 PM"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "A football game starts at 1:15 PM and ends at 3:50 PM. How long is the game?", "options": {"A": "2 hours 15 minutes", "B": "2 hours 25 minutes", "C": "2 hours 35 minutes", "D": "2 hours 45 minutes"}, "correct_answer": "C"},
    {"id": 25, "difficulty": "medium", "question": "You begin painting at 10:45 AM and finish at 12:30 PM. How long did you paint?", "options": {"A": "1 hour 30 minutes", "B": "1 hour 45 minutes", "C": "2 hours", "D": "2 hours 15 minutes"}, "correct_answer": "B"},
    {"id": 26, "difficulty": "medium", "question": "If a flight takes off at 2:40 PM and lands at 5:25 PM, what is the flight duration?", "options": {"A": "2 hours 35 minutes", "B": "2 hours 45 minutes", "C": "2 hours 55 minutes", "D": "3 hours 5 minutes"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "You start gardening at 3:15 PM and work for 2 hours 20 minutes. When do you finish?", "options": {"A": "5:25 PM", "B": "5:35 PM", "C": "5:45 PM", "D": "5:55 PM"}, "correct_answer": "B"},
    {"id": 28, "difficulty": "medium", "question": "A movie runs from 7:20 PM to 9:45 PM. How long is the movie?", "options": {"A": "2 hours 15 minutes", "B": "2 hours 20 minutes", "C": "2 hours 25 minutes", "D": "2 hours 30 minutes"}, "correct_answer": "C"},
    {"id": 29, "difficulty": "medium", "question": "If you begin studying at 4:50 PM and study for 1 hour 40 minutes, when do you finish?", "options": {"A": "6:20 PM", "B": "6:30 PM", "C": "6:40 PM", "D": "6:50 PM"}, "correct_answer": "B"},
    {"id": 30, "difficulty": "medium", "question": "A bus leaves at 9:35 AM and arrives at 12:15 PM. What is the journey time?", "options": {"A": "2 hours 30 minutes", "B": "2 hours 35 minutes", "C": "2 hours 40 minutes", "D": "2 hours 45 minutes"}, "correct_answer": "C"},
    {"id": 31, "difficulty": "medium", "question": "You start baking at 2:25 PM and the cake takes 1 hour 50 minutes. When is it ready?", "options": {"A": "4:05 PM", "B": "4:10 PM", "C": "4:15 PM", "D": "4:20 PM"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "A concert starts at 7:45 PM and ends at 10:20 PM. How long is the concert?", "options": {"A": "2 hours 25 minutes", "B": "2 hours 30 minutes", "C": "2 hours 35 minutes", "D": "2 hours 40 minutes"}, "correct_answer": "C"},
    {"id": 33, "difficulty": "medium", "question": "If you begin exercising at 6:15 AM and exercise for 1 hour 25 minutes, when do you finish?", "options": {"A": "7:30 AM", "B": "7:35 AM", "C": "7:40 AM", "D": "7:45 AM"}, "correct_answer": "C"},
    {"id": 34, "difficulty": "medium", "question": "A car trip starts at 8:50 AM and ends at 11:35 AM. What is the travel time?", "options": {"A": "2 hours 35 minutes", "B": "2 hours 40 minutes", "C": "2 hours 45 minutes", "D": "2 hours 50 minutes"}, "correct_answer": "C"},
    {"id": 35, "difficulty": "medium", "question": "You start reading at 5:40 PM and read for 2 hours 15 minutes. When do you finish?", "options": {"A": "7:45 PM", "B": "7:50 PM", "C": "7:55 PM", "D": "8:00 PM"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "A play starts at 6:30 PM and has a 15-minute intermission. If it ends at 8:45 PM, how long is the actual performance?", "options": {"A": "2 hours", "B": "2 hours 5 minutes", "C": "2 hours 10 minutes", "D": "2 hours 15 minutes"}, "correct_answer": "A"},
    {"id": 37, "difficulty": "medium", "question": "If you start cleaning at 3:20 PM and work for 1 hour 35 minutes, when do you finish?", "options": {"A": "4:45 PM", "B": "4:50 PM", "C": "4:55 PM", "D": "5:00 PM"}, "correct_answer": "C"},
    {"id": 38, "difficulty": "medium", "question": "A train journey takes 3 hours 20 minutes. If it arrives at 2:45 PM, when did it depart?", "options": {"A": "10:25 AM", "B": "11:25 AM", "C": "11:35 AM", "D": "11:45 AM"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "You start watching TV at 8:15 PM and watch for 2 hours 40 minutes. When do you stop?", "options": {"A": "10:45 PM", "B": "10:50 PM", "C": "10:55 PM", "D": "11:00 PM"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "A flight takes 4 hours 15 minutes. If it lands at 3:30 PM, when did it take off?", "options": {"A": "10:15 AM", "B": "11:15 AM", "C": "11:25 AM", "D": "11:35 AM"}, "correct_answer": "B"},
    {"id": 41, "difficulty": "medium", "question": "You start cooking at 6:25 PM and the meal takes 1 hour 50 minutes. When is it ready?", "options": {"A": "8:05 PM", "B": "8:10 PM", "C": "8:15 PM", "D": "8:20 PM"}, "correct_answer": "C"},
    {"id": 42, "difficulty": "medium", "question": "A movie starts at 4:50 PM and ends at 7:15 PM. How long is the movie?", "options": {"A": "2 hours 15 minutes", "B": "2 hours 20 minutes", "C": "2 hours 25 minutes", "D": "2 hours 30 minutes"}, "correct_answer": "C"},
    {"id": 43, "difficulty": "medium", "question": "If you begin studying at 3:35 PM and study for 2 hours 25 minutes, when do you finish?", "options": {"A": "5:50 PM", "B": "6:00 PM", "C": "6:10 PM", "D": "6:20 PM"}, "correct_answer": "B"},
    {"id": 44, "difficulty": "medium", "question": "A bus ride takes 2 hours 40 minutes. If it arrives at 1:20 PM, when did it depart?", "options": {"A": "9:40 AM", "B": "10:40 AM", "C": "10:50 AM", "D": "11:00 AM"}, "correct_answer": "B"},
    {"id": 45, "difficulty": "medium", "question": "You start painting at 10:15 AM and work for 3 hours 10 minutes. When do you finish?", "options": {"A": "1:15 PM", "B": "1:20 PM", "C": "1:25 PM", "D": "1:30 PM"}, "correct_answer": "C"},
    {"id": 46, "difficulty": "medium", "question": "A concert starts at 8:05 PM and ends at 10:50 PM. How long is the concert?", "options": {"A": "2 hours 35 minutes", "B": "2 hours 40 minutes", "C": "2 hours 45 minutes", "D": "2 hours 50 minutes"}, "correct_answer": "C"},
    {"id": 47, "difficulty": "medium", "question": "If you begin exercising at 7:30 AM and exercise for 1 hour 45 minutes, when do you finish?", "options": {"A": "9:05 AM", "B": "9:10 AM", "C": "9:15 AM", "D": "9:20 AM"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "medium", "question": "A car trip takes 3 hours 25 minutes. If it arrives at 4:15 PM, when did it depart?", "options": {"A": "11:50 AM", "B": "12:00 PM", "C": "12:10 PM", "D": "12:20 PM"}, "correct_answer": "A"},
    {"id": 49, "difficulty": "medium", "question": "You start reading at 2:40 PM and read for 2 hours 35 minutes. When do you finish?", "options": {"A": "5:05 PM", "B": "5:10 PM", "C": "5:15 PM", "D": "5:20 PM"}, "correct_answer": "C"},
    {"id": 50, "difficulty": "medium", "question": "A flight takes 5 hours 20 minutes. If it lands at 6:45 PM, when did it take off?", "options": {"A": "12:25 PM", "B": "1:25 PM", "C": "1:35 PM", "D": "1:45 PM"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "medium", "question": "You start cooking at 5:50 PM and the meal takes 2 hours 15 minutes. When is it ready?", "options": {"A": "7:55 PM", "B": "8:00 PM", "C": "8:05 PM", "D": "8:10 PM"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "medium", "question": "A movie starts at 3:25 PM and ends at 5:55 PM. How long is the movie?", "options": {"A": "2 hours 20 minutes", "B": "2 hours 25 minutes", "C": "2 hours 30 minutes", "D": "2 hours 35 minutes"}, "correct_answer": "C"},
    {"id": 53, "difficulty": "medium", "question": "If you begin studying at 4:45 PM and study for 2 hours 40 minutes, when do you finish?", "options": {"A": "7:15 PM", "B": "7:20 PM", "C": "7:25 PM", "D": "7:30 PM"}, "correct_answer": "C"},
    {"id": 54, "difficulty": "medium", "question": "A bus ride takes 4 hours 10 minutes. If it arrives at 3:30 PM, when did it depart?", "options": {"A": "10:20 AM", "B": "11:20 AM", "C": "11:30 AM", "D": "11:40 AM"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "medium", "question": "You start painting at 9:35 AM and work for 3 hours 25 minutes. When do you finish?", "options": {"A": "12:50 PM", "B": "1:00 PM", "C": "1:10 PM", "D": "1:20 PM"}, "correct_answer": "B"},
    {"id": 56, "difficulty": "medium", "question": "A concert starts at 7:15 PM and ends at 10:05 PM. How long is the concert?", "options": {"A": "2 hours 40 minutes", "B": "2 hours 45 minutes", "C": "2 hours 50 minutes", "D": "2 hours 55 minutes"}, "correct_answer": "C"},
    {"id": 57, "difficulty": "medium", "question": "If you begin exercising at 6:40 AM and exercise for 1 hour 35 minutes, when do you finish?", "options": {"A": "8:05 AM", "B": "8:10 AM", "C": "8:15 AM", "D": "8:20 AM"}, "correct_answer": "C"},
    {"id": 58, "difficulty": "medium", "question": "A car trip takes 2 hours 45 minutes. If it arrives at 5:20 PM, when did it depart?", "options": {"A": "1:35 PM", "B": "2:35 PM", "C": "2:40 PM", "D": "2:45 PM"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "medium", "question": "You start reading at 1:50 PM and read for 3 hours 20 minutes. When do you finish?", "options": {"A": "5:00 PM", "B": "5:05 PM", "C": "5:10 PM", "D": "5:15 PM"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "medium", "question": "A flight takes 6 hours 15 minutes. If it lands at 8:30 PM, when did it take off?", "options": {"A": "1:15 PM", "B": "2:15 PM", "C": "2:25 PM", "D": "2:35 PM"}, "correct_answer": "B"},
    {"id": 61, "difficulty": "medium", "question": "You start cooking at 6:30 PM and the meal takes 2 hours 25 minutes. When is it ready?", "options": {"A": "8:45 PM", "B": "8:50 PM", "C": "8:55 PM", "D": "9:00 PM"}, "correct_answer": "C"},
    {"id": 62, "difficulty": "medium", "question": "A movie starts at 2:15 PM and ends at 4:40 PM. How long is the movie?", "options": {"A": "2 hours 15 minutes", "B": "2 hours 20 minutes", "C": "2 hours 25 minutes", "D": "2 hours 30 minutes"}, "correct_answer": "C"},
    {"id": 63, "difficulty": "medium", "question": "If you begin studying at 5:20 PM and study for 2 hours 50 minutes, when do you finish?", "options": {"A": "8:00 PM", "B": "8:05 PM", "C": "8:10 PM", "D": "8:15 PM"}, "correct_answer": "C"},
    {"id": 64, "difficulty": "medium", "question": "A bus ride takes 5 hours 30 minutes. If it arrives at 6:45 PM, when did it depart?", "options": {"A": "12:15 PM", "B": "1:15 PM", "C": "1:25 PM", "D": "1:35 PM"}, "correct_answer": "B"},
    {"id": 65, "difficulty": "medium", "question": "You start painting at 8:25 AM and work for 4 hours 15 minutes. When do you finish?", "options": {"A": "12:30 PM", "B": "12:35 PM", "C": "12:40 PM", "D": "12:45 PM"}, "correct_answer": "C"},
    {"id": 66, "difficulty": "medium", "question": "A concert starts at 6:45 PM and ends at 9:35 PM. How long is the concert?", "options": {"A": "2 hours 40 minutes", "B": "2 hours 45 minutes", "C": "2 hours 50 minutes", "D": "2 hours 55 minutes"}, "correct_answer": "C"},
    {"id": 67, "difficulty": "medium", "question": "If you begin exercising at 7:15 AM and exercise for 2 hours 10 minutes, when do you finish?", "options": {"A": "9:15 AM", "B": "9:20 AM", "C": "9:25 AM", "D": "9:30 AM"}, "correct_answer": "C"},
    {"id": 68, "difficulty": "medium", "question": "A car trip takes 3 hours 55 minutes. If it arrives at 4:40 PM, when did it depart?", "options": {"A": "11:45 AM", "B": "12:45 AM", "C": "12:45 PM", "D": "1:45 PM"}, "correct_answer": "C"},
    {"id": 69, "difficulty": "medium", "question": "You start reading at 3:35 PM and read for 3 hours 45 minutes. When do you finish?", "options": {"A": "7:10 PM", "B": "7:15 PM", "C": "7:20 PM", "D": "7:25 PM"}, "correct_answer": "C"},
    {"id": 70, "difficulty": "medium", "question": "A flight takes 7 hours 20 minutes. If it lands at 11:15 PM, when did it take off?", "options": {"A": "2:55 PM", "B": "3:55 PM", "C": "4:05 PM", "D": "4:15 PM"}, "correct_answer": "B"},
    {"id": 71, "difficulty": "medium", "question": "You start cooking at 7:40 PM and the meal takes 2 hours 35 minutes. When is it ready?", "options": {"A": "10:05 PM", "B": "10:10 PM", "C": "10:15 PM", "D": "10:20 PM"}, "correct_answer": "C"},
    {"id": 72, "difficulty": "medium", "question": "A movie starts at 5:10 PM and ends at 7:45 PM. How long is the movie?", "options": {"A": "2 hours 25 minutes", "B": "2 hours 30 minutes", "C": "2 hours 35 minutes", "D": "2 hours 40 minutes"}, "correct_answer": "C"},
    {"id": 73, "difficulty": "medium", "question": "If you begin studying at 6:50 PM and study for 3 hours 15 minutes, when do you finish?", "options": {"A": "9:55 PM", "B": "10:00 PM", "C": "10:05 PM", "D": "10:10 PM"}, "correct_answer": "C"},
    {"id": 74, "difficulty": "medium", "question": "A bus ride takes 6 hours 45 minutes. If it arrives at 8:30 PM, when did it depart?", "options": {"A": "12:45 PM", "B": "1:45 PM", "C": "1:55 PM", "D": "2:05 PM"}, "correct_answer": "B"},
    {"id": 75, "difficulty": "medium", "question": "You start painting at 9:55 AM and work for 5 hours 20 minutes. When do you finish?", "options": {"A": "3:05 PM", "B": "3:10 PM", "C": "3:15 PM", "D": "3:20 PM"}, "correct_answer": "C"},
    {"id": 76, "difficulty": "medium", "question": "A concert starts at 8:20 PM and ends at 11:15 PM. How long is the concert?", "options": {"A": "2 hours 45 minutes", "B": "2 hours 50 minutes", "C": "2 hours 55 minutes", "D": "3 hours"}, "correct_answer": "C"},
    {"id": 77, "difficulty": "medium", "question": "If you begin exercising at 8:05 AM and exercise for 2 hours 40 minutes, when do you finish?", "options": {"A": "10:35 AM", "B": "10:40 AM", "C": "10:45 AM", "D": "10:50 AM"}, "correct_answer": "C"},
    {"id": 78, "difficulty": "medium", "question": "A car trip takes 4 hours 25 minutes. If it arrives at 6:50 PM, when did it depart?", "options": {"A": "1:25 PM", "B": "2:25 PM", "C": "2:35 PM", "D": "2:45 PM"}, "correct_answer": "B"},
    {"id": 79, "difficulty": "medium", "question": "You start reading at 4:45 PM and read for 4 hours 30 minutes. When do you finish?", "options": {"A": "9:05 PM", "B": "9:10 PM", "C": "9:15 PM", "D": "9:20 PM"}, "correct_answer": "C"},
    {"id": 80, "difficulty": "medium", "question": "A flight takes 8 hours 15 minutes. If it lands at 9:30 AM, when did it take off?", "options": {"A": "12:15 AM", "B": "1:15 AM", "C": "1:25 AM", "D": "1:35 AM"}, "correct_answer": "B"},
    
    {"id": 81, "difficulty": "hard", "question": "A train leaves at 7:45 AM and arrives at 2:30 PM with a 25-minute stop. What is the actual travel time?", "options": {"A": "6 hours 10 minutes", "B": "6 hours 15 minutes", "C": "6 hours 20 minutes", "D": "6 hours 25 minutes"}, "correct_answer": "C"},
    {"id": 82, "difficulty": "hard", "question": "You start a project at 9:20 AM, take a 45-minute lunch break, and finish at 3:15 PM. How much actual work time?", "options": {"A": "4 hours 55 minutes", "B": "5 hours 5 minutes", "C": "5 hours 10 minutes", "D": "5 hours 15 minutes"}, "correct_answer": "C"},
    {"id": 83, "difficulty": "hard", "question": "A flight takes off at 10:35 AM, has a 1 hour 20 minute layover, and lands at 4:55 PM. What is the total air time?", "options": {"A": "4 hours 50 minutes", "B": "4 hours 55 minutes", "C": "5 hours", "D": "5 hours 5 minutes"}, "correct_answer": "C"},
    {"id": 84, "difficulty": "hard", "question": "You study from 2:15 PM to 5:45 PM with two 15-minute breaks. What is the actual study time?", "options": {"A": "3 hours", "B": "3 hours 5 minutes", "C": "3 hours 10 minutes", "D": "3 hours 15 minutes"}, "correct_answer": "A"},
    {"id": 85, "difficulty": "hard", "question": "A concert starts at 7:30 PM, has a 20-minute intermission, and ends at 10:25 PM. How long is the performance?", "options": {"A": "2 hours 25 minutes", "B": "2 hours 30 minutes", "C": "2 hours 35 minutes", "D": "2 hours 40 minutes"}, "correct_answer": "C"},
    {"id": 86, "difficulty": "hard", "question": "You work from 8:40 AM to 12:15 PM and 1:30 PM to 5:45 PM with a 15-minute coffee break. Total work time?", "options": {"A": "7 hours 20 minutes", "B": "7 hours 25 minutes", "C": "7 hours 30 minutes", "D": "7 hours 35 minutes"}, "correct_answer": "B"},
    {"id": 87, "difficulty": "hard", "question": "A bus leaves at 6:25 AM, makes three 10-minute stops, and arrives at 11:40 AM. Actual driving time?", "options": {"A": "4 hours 35 minutes", "B": "4 hours 40 minutes", "C": "4 hours 45 minutes", "D": "4 hours 50 minutes"}, "correct_answer": "C"},
    {"id": 88, "difficulty": "hard", "question": "You cook from 4:50 PM to 7:35 PM with 25 minutes of preparation time. Actual cooking time?", "options": {"A": "2 hours 15 minutes", "B": "2 hours 20 minutes", "C": "2 hours 25 minutes", "D": "2 hours 30 minutes"}, "correct_answer": "B"},
    {"id": 89, "difficulty": "hard", "question": "A movie runs from 6:15 PM to 8:55 PM with 20 minutes of previews. Movie length?", "options": {"A": "2 hours 15 minutes", "B": "2 hours 20 minutes", "C": "2 hours 25 minutes", "D": "2 hours 30 minutes"}, "correct_answer": "B"},
    {"id": 90, "difficulty": "hard", "question": "You exercise from 7:20 AM to 9:05 AM with three 5-minute water breaks. Actual exercise time?", "options": {"A": "1 hour 30 minutes", "B": "1 hour 35 minutes", "C": "1 hour 40 minutes", "D": "1 hour 45 minutes"}, "correct_answer": "A"},
    {"id": 91, "difficulty": "hard", "question": "A train journey: 8:15 AM to 12:45 PM with two 15-minute stops. Travel time?", "options": {"A": "4 hours", "B": "4 hours 5 minutes", "C": "4 hours 10 minutes", "D": "4 hours 15 minutes"}, "correct_answer": "A"},
    {"id": 92, "difficulty": "hard", "question": "You study from 3:25 PM to 6:50 PM with a 20-minute snack break. Study time?", "options": {"A": "3 hours", "B": "3 hours 5 minutes", "C": "3 hours 10 minutes", "D": "3 hours 15 minutes"}, "correct_answer": "B"},
    {"id": 93, "difficulty": "hard", "question": "A flight: 9:40 AM to 2:15 PM with 45-minute layover. Air time?", "options": {"A": "3 hours 45 minutes", "B": "3 hours 50 minutes", "C": "3 hours 55 minutes", "D": "4 hours"}, "correct_answer": "B"},
    {"id": 94, "difficulty": "hard", "question": "You work from 9:10 AM to 12:30 PM and 1:45 PM to 5:20 PM with 25-minute lunch. Work time?", "options": {"A": "6 hours 25 minutes", "B": "6 hours 30 minutes", "C": "6 hours 35 minutes", "D": "6 hours 40 minutes"}, "correct_answer": "B"},
    {"id": 95, "difficulty": "hard", "question": "A concert: 7:50 PM to 10:35 PM with 15-minute intermission. Performance time?", "options": {"A": "2 hours 25 minutes", "B": "2 hours 30 minutes", "C": "2 hours 35 minutes", "D": "2 hours 40 minutes"}, "correct_answer": "B"},
    {"id": 96, "difficulty": "hard", "question": "You cook from 5:35 PM to 8:15 PM with 40 minutes preparation. Cooking time?", "options": {"A": "2 hours", "B": "2 hours 5 minutes", "C": "2 hours 10 minutes", "D": "2 hours 15 minutes"}, "correct_answer": "A"},
    {"id": 97, "difficulty": "hard", "question": "A bus trip: 7:20 AM to 11:45 AM with three 8-minute stops. Driving time?", "options": {"A": "4 hours", "B": "4 hours 5 minutes", "C": "4 hours 10 minutes", "D": "4 hours 15 minutes"}, "correct_answer": "B"},
    {"id": 98, "difficulty": "hard", "question": "You exercise from 6:45 AM to 8:30 AM with two 10-minute breaks. Exercise time?", "options": {"A": "1 hour 25 minutes", "B": "1 hour 30 minutes", "C": "1 hour 35 minutes", "D": "1 hour 40 minutes"}, "correct_answer": "C"},
    {"id": 99, "difficulty": "hard", "question": "A movie: 5:30 PM to 8:05 PM with 25 minutes previews. Movie length?", "options": {"A": "2 hours 5 minutes", "B": "2 hours 10 minutes", "C": "2 hours 15 minutes", "D": "2 hours 20 minutes"}, "correct_answer": "B"},
    {"id": 100, "difficulty": "hard", "question": "You work from 8:30 AM to 12:00 PM and 1:15 PM to 5:45 PM with 20-minute coffee break. Total work?", "options": {"A": "7 hours 35 minutes", "B": "7 hours 40 minutes", "C": "7 hours 45 minutes", "D": "7 hours 50 minutes"}, "correct_answer": "B"}
  ]
}