{
  "title": "Time - Duration of time",
  "questions": [
    {
      "id": 1,
      "difficulty": "Easy",
      "question": "How many minutes in 1 hour?",
      "options": { "A": "30", "B": "60", "C": "90", "D": "45" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "Easy",
      "question": "If you start at 10:00 and wait 1 hour, what time is it?",
      "options": { "A": "10:00", "B": "11:00", "C": "09:00", "D": "12:00" },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "Easy",
      "question": "How long is 2 hours?",
      "options": {
        "A": "120 minutes",
        "B": "60 minutes",
        "C": "30 minutes",
        "D": "90 minutes"
      },
      "correct_answer": "A"
    },
    {
      "id": 4,
      "difficulty": "Easy",
      "question": "From 9:00 to 10:00 is how many hours?",
      "options": {
        "A": "1 hour",
        "B": "2 hours",
        "C": "30 minutes",
        "D": "0 hours"
      },
      "correct_answer": "A"
    },
    {
      "id": 5,
      "difficulty": "Easy",
      "question": "What is 30 minutes from 2:00?",
      "options": { "A": "02:30", "B": "01:30", "C": "03:00", "D": "02:00" },
      "correct_answer": "A"
    },
    {
      "id": 6,
      "difficulty": "Easy",
      "question": "How many minutes in half an hour?",
      "options": { "A": "15", "B": "45", "C": "60", "D": "30" },
      "correct_answer": "D"
    },
    {
      "id": 7,
      "difficulty": "Easy",
      "question": "If a show lasts 1 hour, how long is it in minutes?",
      "options": {
        "A": "60 minutes",
        "B": "30 minutes",
        "C": "90 minutes",
        "D": "45 minutes"
      },
      "correct_answer": "A"
    },
    {
      "id": 8,
      "difficulty": "Easy",
      "question": "From 3:00 to 4:00 is _____ minutes.",
      "options": { "A": "30", "B": "60", "C": "120", "D": "45" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "Easy",
      "question": "Add 1 hour to 5:00. What time?",
      "options": { "A": "06:00", "B": "04:00", "C": "05:30", "D": "07:00" },
      "correct_answer": "A"
    },
    {
      "id": 10,
      "difficulty": "Easy",
      "question": "How long from 8:00 to 8:30?",
      "options": {
        "A": "30 minutes",
        "B": "1 hour",
        "C": "15 minutes",
        "D": "45 minutes"
      },
      "correct_answer": "A"
    },
    {
      "id": 11,
      "difficulty": "Easy",
      "question": "2 hours = _____ minutes.",
      "options": { "A": "120", "B": "60", "C": "90", "D": "150" },
      "correct_answer": "A"
    },
    {
      "id": 12,
      "difficulty": "Easy",
      "question": "What time after 45 minutes from 1:00?",
      "options": { "A": "01:45", "B": "01:30", "C": "02:00", "D": "00:45" },
      "correct_answer": "A"
    },
    {
      "id": 13,
      "difficulty": "Easy",
      "question": "Duration of 1 hour 30 minutes in minutes?",
      "options": { "A": "60", "B": "90", "C": "120", "D": "30" },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "Easy",
      "question": "From 12:00 to 1:00 PM is how long?",
      "options": {
        "A": "1 hour",
        "B": "30 minutes",
        "C": "2 hours",
        "D": "60 minutes"
      },
      "correct_answer": "A"
    },
    {
      "id": 15,
      "difficulty": "Easy",
      "question": "How many minutes in 3 hours?",
      "options": { "A": "180", "B": "120", "C": "90", "D": "240" },
      "correct_answer": "A"
    },
    {
      "id": 16,
      "difficulty": "Easy",
      "question": "15 minutes from 4:00 is?",
      "options": { "A": "04:15", "B": "03:45", "C": "04:30", "D": "05:00" },
      "correct_answer": "A"
    },
    {
      "id": 17,
      "difficulty": "Easy",
      "question": "What is the duration from 7:00 to 7:00 next day?",
      "options": {
        "A": "12 hours",
        "B": "24 hours",
        "C": "1 hour",
        "D": "6 hours"
      },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "Easy",
      "question": "20 minutes added to 6:00?",
      "options": { "A": "06:20", "B": "06:40", "C": "05:40", "D": "07:00" },
      "correct_answer": "A"
    },
    {
      "id": 19,
      "difficulty": "Easy",
      "question": "How long is 4 hours in minutes?",
      "options": { "A": "240", "B": "180", "C": "120", "D": "300" },
      "correct_answer": "A"
    },
    {
      "id": 20,
      "difficulty": "Easy",
      "question": "From 11:00 to 11:30?",
      "options": {
        "A": "30 minutes",
        "B": "1 hour",
        "C": "15 minutes",
        "D": "45 minutes"
      },
      "correct_answer": "A"
    },
    {
      "id": 21,
      "difficulty": "Medium",
      "question": "What is 2 hours 15 minutes in total minutes?",
      "options": { "A": "120", "B": "135", "C": "150", "D": "105" },
      "correct_answer": "B"
    },
    {
      "id": 22,
      "difficulty": "Medium",
      "question": "Start at 9:15, add 45 minutes. End time?",
      "options": { "A": "09:45", "B": "10:00", "C": "10:15", "D": "08:30" },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "Medium",
      "question": "How long from 2:30 to 4:00?",
      "options": {
        "A": "1 hour",
        "B": "1 hour 30 min",
        "C": "2 hours",
        "D": "30 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 24,
      "difficulty": "Medium",
      "question": "Add 1 hour 20 min to 5:40. What time?",
      "options": {
        "A": "07:00",
        "B": "06:40",
        "C": "07:20",
        "D": "06:20"
      },
      "correct_answer": "A"
    },
    {
      "id": 25,
      "difficulty": "Medium",
      "question": "Duration of 3 hours 45 min in minutes?",
      "options": { "A": "180", "B": "225", "C": "200", "D": "165" },
      "correct_answer": "B"
    },
    {
      "id": 26,
      "difficulty": "Medium",
      "question": "From 10:45 to 12:15? How long?",
      "options": {
        "A": "1 hour 30 min",
        "B": "2 hours",
        "C": "1 hour 15 min",
        "D": "1 hour 45 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 27,
      "difficulty": "Medium",
      "question": "What time after 2 hours 30 min from 3:20?",
      "options": {
        "A": "05:50",
        "B": "05:20",
        "C": "06:20",
        "D": "04:50"
      },
      "correct_answer": "A"
    },
    {
      "id": 28,
      "difficulty": "Medium",
      "question": "How many minutes from 7:00 to 7:45?",
      "options": { "A": "30", "B": "45", "C": "60", "D": "15" },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "Medium",
      "question": "Total duration: 1 hour + 45 min + 15 min.",
      "options": {
        "A": "2 hours",
        "B": "2 hours 15 min",
        "C": "1 hour 45 min",
        "D": "2 hours 30 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 30,
      "difficulty": "Medium",
      "question": "From 4:50 to 6:20? Duration?",
      "options": {
        "A": "1 hour 20 min",
        "B": "1 hour 30 min",
        "C": "2 hours",
        "D": "1 hour 10 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 31,
      "difficulty": "Medium",
      "question": "Add 50 min to 8:10. End time?",
      "options": { "A": "09:00", "B": "08:50", "C": "09:10", "D": "09:20" },
      "correct_answer": "A"
    },
    {
      "id": 32,
      "difficulty": "Medium",
      "question": "4 hours 20 min in minutes?",
      "options": { "A": "240", "B": "260", "C": "280", "D": "220" },
      "correct_answer": "B"
    },
    {
      "id": 33,
      "difficulty": "Medium",
      "question": "Duration between 1:15 PM and 2:45 PM?",
      "options": {
        "A": "1 hour 15 min",
        "B": "1 hour 30 min",
        "C": "1 hour 45 min",
        "D": "2 hours"
      },
      "correct_answer": "B"
    },
    {
      "id": 34,
      "difficulty": "Medium",
      "question": "What time is 1 hour 45 min after 11:30?",
      "options": {
        "A": "12:45",
        "B": "01:00",
        "C": "13:15",
        "D": "12:15"
      },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "Medium",
      "question": "How long: 2:00 to 3:15?",
      "options": {
        "A": "1 hour",
        "B": "1 hour 15 min",
        "C": "45 min",
        "D": "1 hour 30 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 36,
      "difficulty": "Medium",
      "question": "Total minutes: 2 hours 10 min + 30 min.",
      "options": { "A": "150", "B": "160", "C": "170", "D": "140" },
      "correct_answer": "B"
    },
    {
      "id": 37,
      "difficulty": "Medium",
      "question": "From 6:25 to 8:10?",
      "options": {
        "A": "1 hour 35 min",
        "B": "1 hour 45 min",
        "C": "2 hours",
        "D": "1 hour 25 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "Medium",
      "question": "3 hours from 10:00 AM?",
      "options": { "A": "13:00", "B": "12:00", "C": "14:00", "D": "11:00" },
      "correct_answer": "A"
    },
    {
      "id": 39,
      "difficulty": "Medium",
      "question": "Add 1h50m to 4:20. End?",
      "options": {
        "A": "06:10",
        "B": "05:50",
        "C": "06:30",
        "D": "05:40"
      },
      "correct_answer": "A"
    },
    {
      "id": 40,
      "difficulty": "Medium",
      "question": "How many hours in 180 minutes?",
      "options": { "A": "2", "B": "3", "C": "1", "D": "4" },
      "correct_answer": "B"
    },
    {
      "id": 41,
      "difficulty": "Hard",
      "question": "From 5:55 to 7:40? Duration?",
      "options": {
        "A": "1 hour 45 min",
        "B": "2 hours",
        "C": "1 hour 35 min",
        "D": "1 hour 55 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 42,
      "difficulty": "Hard",
      "question": "Add 2 hours 25 min to 9:35. End time?",
      "options": {
        "A": "12:00",
        "B": "11:50",
        "C": "12:20",
        "D": "11:20"
      },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "Hard",
      "question": "Duration from 11:20 AM to 1:05 PM?",
      "options": {
        "A": "1 hour 45 min",
        "B": "2 hours",
        "C": "1 hour 35 min",
        "D": "1 hour 55 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 44,
      "difficulty": "Hard",
      "question": "Total duration: 1h 40min + 2h 55min.",
      "options": {
        "A": "4 hours 35 min",
        "B": "4 hours 55 min",
        "C": "5 hours",
        "D": "3 hours 35 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 45,
      "difficulty": "Hard",
      "question": "What time after 3 hours 15 min from 7:45?",
      "options": { "A": "11:00", "B": "11:15", "C": "10:45", "D": "11:30" },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "Hard",
      "question": "How long from 3:10 to 6:55?",
      "options": {
        "A": "3 hours 45 min",
        "B": "3 hours 55 min",
        "C": "4 hours",
        "D": "3 hours 35 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 47,
      "difficulty": "Hard",
      "question": "Convert 4 hours 30 min to minutes.",
      "options": { "A": "250", "B": "270", "C": "240", "D": "260" },
      "correct_answer": "B"
    },
    {
      "id": 48,
      "difficulty": "Hard",
      "question": "Subtract durations: 5 hours - 2 hours 20 min = ?",
      "options": {
        "A": "2 hours 40 min",
        "B": "3 hours 20 min",
        "C": "2 hours 20 min",
        "D": "2 hours 50 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 49,
      "difficulty": "Hard",
      "question": "From 2:50 to 5:25 same day.",
      "options": {
        "A": "2 hours 35 min",
        "B": "2 hours 45 min",
        "C": "3 hours",
        "D": "2 hours 25 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 50,
      "difficulty": "Hard",
      "question": "Total time: 45 min + 1h 30 min + 2h 15 min.",
      "options": {
        "A": "4 hours 30 min",
        "B": "4 hours",
        "C": "4 hours 15 min",
        "D": "4 hours 45 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 51,
      "difficulty": "Hard",
      "question": "What is 150 minutes in hours and minutes?",
      "options": {
        "A": "2 hours 30 min",
        "B": "2 hours 15 min",
        "C": "2 hours 45 min",
        "D": "3 hours"
      },
      "correct_answer": "A"
    },
    {
      "id": 52,
      "difficulty": "Hard",
      "question": "Duration from 10:05 to 1:50?",
      "options": {
        "A": "3 hours 45 min",
        "B": "3 hours 35 min",
        "C": "3 hours 55 min",
        "D": "4 hours"
      },
      "correct_answer": "A"
    },
    {
      "id": 53,
      "difficulty": "Hard",
      "question": "Add 3h 40min to 4:25. End?",
      "options": { "A": "08:05", "B": "08:25", "C": "07:45", "D": "08:45" },
      "correct_answer": "A"
    },
    {
      "id": 54,
      "difficulty": "Hard",
      "question": "How long is 320 minutes?",
      "options": {
        "A": "5 hours 20 min",
        "B": "5 hours 10 min",
        "C": "5 hours 30 min",
        "D": "4 hours 20 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 55,
      "difficulty": "Hard",
      "question": "From 8:40 to 11:15?",
      "options": {
        "A": "2 hours 35 min",
        "B": "2 hours 45 min",
        "C": "2 hours 25 min",
        "D": "3 hours"
      },
      "correct_answer": "A"
    },
    {
      "id": 56,
      "difficulty": "Hard",
      "question": "Total: 2h 50min + 1h 45min.",
      "options": {
        "A": "4 hours 35 min",
        "B": "4 hours 25 min",
        "C": "4 hours 45 min",
        "D": "3 hours 35 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 57,
      "difficulty": "Hard",
      "question": "4 hours 55 min from 6:10? End time?",
      "options": { "A": "11:05", "B": "11:15", "C": "10:55", "D": "11:25" },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "Hard",
      "question": "Convert 210 min to h and m.",
      "options": {
        "A": "3 hours 30 min",
        "B": "3 hours 45 min",
        "C": "3 hours 15 min",
        "D": "4 hours"
      },
      "correct_answer": "A"
    },
    {
      "id": 59,
      "difficulty": "Hard",
      "question": "Convert 210 min to h and m.",
      "options": {
        "A": "3 hours 30 min",
        "B": "3 hours 45 min",
        "C": "3 hours 15 min",
        "D": "4 hours"
      },
      "correct_answer": "A"
    },
    {
      "id": 60,
      "difficulty": "Hard",
      "question": "Add 2 hours 25 min to 9:35. End time?",
      "options": {
        "A": "12:00",
        "B": "11:50",
        "C": "12:20",
        "D": "11:20"
      },
      "correct_answer": "A"
    }
  ]
}