{
  "title": "Time Calculations (Time and Calendar) - Grade 4 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "How many minutes are there in 1 hour? ⏰",
      "options": { "A": "50", "B": "60", "C": "70", "D": "100" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "What time is it when the hour hand is on 3 and the minute hand is on 12? 🕒",
      "options": { "A": "3:00", "B": "3:12", "C": "12:03", "D": "3:30" },
      "correct_answer": "A"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "How many seconds are in 1 minute? ⏱️",
      "options": { "A": "60", "B": "100", "C": "50", "D": "30" },
      "correct_answer": "A"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "If a movie starts at 4:00 PM and ends at 6:00 PM, how long is the movie? 🎬",
      "options": {
        "A": "1 hour",
        "B": "2 hours",
        "C": "3 hours",
        "D": "4 hours"
      },
      "correct_answer": "B"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "What does AM stand for? 🌅",
      "options": {
        "A": "After Midnight",
        "B": "Ante Meridiem",
        "C": "At Morning",
        "D": "After Morning"
      },
      "correct_answer": "B"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "If it is 2:30 now, what time will it be in 1 hour? ➕",
      "options": { "A": "3:00", "B": "3:30", "C": "4:30", "D": "2:40" },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "How many hours are there in 1 day? 🌞🌜",
      "options": { "A": "12", "B": "24", "C": "30", "D": "60" },
      "correct_answer": "B"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "What time is 30 minutes after 9:15? 🕤",
      "options": { "A": "9:30", "B": "9:45", "C": "10:15", "D": "9:40" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "If you wake up at 7:00 AM and sleep at 9:00 PM, how many hours are you awake? 😴",
      "options": {
        "A": "10 hours",
        "B": "12 hours",
        "C": "14 hours",
        "D": "16 hours"
      },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "What time is half past 8? 🕣",
      "options": { "A": "8:00", "B": "8:15", "C": "8:30", "D": "8:45" },
      "correct_answer": "C"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "How many minutes are in 2 hours? ⏳",
      "options": { "A": "60", "B": "100", "C": "120", "D": "150" },
      "correct_answer": "C"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "If school ends at 3:45 PM and you reach home at 4:15 PM, how long is your travel time? 🚌",
      "options": { "A": "15 min", "B": "30 min", "C": "45 min", "D": "1 hour" },
      "correct_answer": "B"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "What is quarter past 5? 🕔",
      "options": { "A": "5:00", "B": "5:15", "C": "5:30", "D": "5:45" },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "How many hours are from 10 AM to 2 PM? 🌤️",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "If the time is 11:00 AM, what time was it 2 hours ago? ↩️",
      "options": {
        "A": "9:00 AM",
        "B": "1:00 PM",
        "C": "10:00 AM",
        "D": "8:00 AM"
      },
      "correct_answer": "A"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Which is later: 8:15 AM or 8:15 PM? 🌓",
      "options": {
        "A": "8:15 AM",
        "B": "8:15 PM",
        "C": "Same",
        "D": "Can't compare"
      },
      "correct_answer": "B"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "How many seconds are in 2 minutes? ⏲️",
      "options": { "A": "60", "B": "100", "C": "120", "D": "180" },
      "correct_answer": "C"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "If a TV show lasts 45 minutes and starts at 5:00 PM, when does it end? 📺",
      "options": {
        "A": "5:45 PM",
        "B": "6:00 PM",
        "C": "5:30 PM",
        "D": "6:15 PM"
      },
      "correct_answer": "A"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "What is quarter to 9? 🕣",
      "options": { "A": "8:45", "B": "9:15", "C": "9:45", "D": "8:15" },
      "correct_answer": "A"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "If you study from 4:00 PM to 5:30 PM, for how long did you study? 📚",
      "options": {
        "A": "30 min",
        "B": "1 hour",
        "C": "1.5 hours",
        "D": "2 hours"
      },
      "correct_answer": "C"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "A cricket match started at 10:15 AM and ended at 4:45 PM. How long did it last? 🏏",
      "options": {
        "A": "5 hours 30 min",
        "B": "6 hours",
        "C": "6 hours 30 min",
        "D": "7 hours"
      },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "If it is 3:20 PM now, what time will it be in 2 hours and 15 minutes? ➕",
      "options": {
        "A": "5:20 PM",
        "B": "5:35 PM",
        "C": "5:30 PM",
        "D": "5:45 PM"
      },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "A train leaves at 8:40 AM and arrives at 11:10 AM. What is the journey time? 🚂",
      "options": {
        "A": "2 hours 30 min",
        "B": "2 hours",
        "C": "3 hours",
        "D": "2 hours 20 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "How many minutes are there from 9:10 AM to 10:05 AM? ⏳",
      "options": { "A": "50 min", "B": "55 min", "C": "60 min", "D": "45 min" },
      "correct_answer": "B"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "If a clock shows 6:45, what is the smaller angle between the hour and minute hands? 📐",
      "options": { "A": "60°", "B": "67.5°", "C": "90°", "D": "45°" },
      "correct_answer": "B"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "A movie is 2 hours 25 minutes long. If it ends at 10:15 PM, when did it start? 🎥",
      "options": {
        "A": "7:50 PM",
        "B": "8:00 PM",
        "C": "8:10 PM",
        "D": "7:45 PM"
      },
      "correct_answer": "A"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Rohan's class is 35 minutes long. It starts at 11:20 AM. When does it end? 🏫",
      "options": {
        "A": "11:50 AM",
        "B": "11:55 AM",
        "C": "12:00 PM",
        "D": "11:45 AM"
      },
      "correct_answer": "B"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "If 1 hour = 60 minutes, how many minutes are in 3.5 hours? ⏰",
      "options": { "A": "180", "B": "200", "C": "210", "D": "240" },
      "correct_answer": "C"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "A bus takes 1 hour 40 minutes from City A to City B. If it left at 2:30 PM, when will it arrive? 🚍",
      "options": {
        "A": "4:00 PM",
        "B": "4:10 PM",
        "C": "4:20 PM",
        "D": "4:30 PM"
      },
      "correct_answer": "B"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "What time is 100 minutes after 1:45 PM? ➕",
      "options": {
        "A": "3:25 PM",
        "B": "3:15 PM",
        "C": "3:30 PM",
        "D": "3:45 PM"
      },
      "correct_answer": "A"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "If you sleep at 9:30 PM and wake up at 6:45 AM, how long did you sleep? 😴",
      "options": {
        "A": "8 h 15 min",
        "B": "9 h 15 min",
        "C": "9 h 30 min",
        "D": "8 h 45 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "How many seconds are in 1 hour 10 minutes? ⏱️",
      "options": { "A": "3600", "B": "4200", "C": "4800", "D": "5400" },
      "correct_answer": "B"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "A race started at 9:50 AM. The winner finished in 1 hour 25 minutes. When did they finish? 🏁",
      "options": {
        "A": "11:15 AM",
        "B": "11:10 AM",
        "C": "11:20 AM",
        "D": "11:25 AM"
      },
      "correct_answer": "A"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "If the time is 7:55 AM, what time was it 20 minutes ago? ↩️",
      "options": {
        "A": "7:25 AM",
        "B": "7:30 AM",
        "C": "7:35 AM",
        "D": "7:40 AM"
      },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "A cake needs to bake for 45 minutes. If you put it in at 10:20 AM, when should you take it out? 🎂",
      "options": {
        "A": "11:00 AM",
        "B": "11:05 AM",
        "C": "11:10 AM",
        "D": "11:15 AM"
      },
      "correct_answer": "B"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "From 12:00 noon to 3:30 PM, how many minutes have passed? 🌞",
      "options": { "A": "180", "B": "200", "C": "210", "D": "240" },
      "correct_answer": "C"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "If a clock loses 5 minutes every hour, what will it show at 12:00 PM if it was correct at 8:00 AM? 🕰️",
      "options": {
        "A": "11:20 AM",
        "B": "11:40 AM",
        "C": "12:20 PM",
        "D": "11:30 AM"
      },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "An exam lasts 2 hours 15 minutes. It started at 10:45 AM. When will it finish? 📝",
      "options": {
        "A": "1:00 PM",
        "B": "12:45 PM",
        "C": "1:05 PM",
        "D": "12:50 PM"
      },
      "correct_answer": "A"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "What is 1/4 of an hour in minutes? 🍕",
      "options": { "A": "10", "B": "15", "C": "20", "D": "25" },
      "correct_answer": "B"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "If you watch 3 episodes back-to-back, each 25 minutes long, how long do you watch? 📺",
      "options": { "A": "65 min", "B": "70 min", "C": "75 min", "D": "80 min" },
      "correct_answer": "C"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "A flight departs at 11:45 PM and arrives at 5:15 AM (next day). What is the flight duration? ✈️",
      "options": {
        "A": "5 h 30 min",
        "B": "6 h 30 min",
        "C": "5 h 45 min",
        "D": "6 h 15 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "If it is 5:00 PM in Delhi (IST), what time is it in London (GMT), which is 5 hours 30 minutes behind? 🌍",
      "options": {
        "A": "10:30 AM",
        "B": "11:30 AM",
        "C": "12:30 PM",
        "D": "1:30 PM"
      },
      "correct_answer": "B"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "A meeting started at 2:30 PM and ended at 5:15 PM. There was a 20-minute break in between. What was the actual meeting duration (excluding break)? 🤝",
      "options": {
        "A": "2 h 15 min",
        "B": "2 h 25 min",
        "C": "2 h 30 min",
        "D": "2 h 45 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "How many times do the hour and minute hands of a clock overlap in 12 hours? 🔁",
      "options": { "A": "10", "B": "11", "C": "12", "D": "13" },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "A watch gains 3 seconds every minute. If it is set right at 7:00 AM, what time will it show at 7:00 PM? ⌚",
      "options": {
        "A": "7:12 PM",
        "B": "7:18 PM",
        "C": "7:24 PM",
        "D": "7:36 PM"
      },
      "correct_answer": "D"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "If 1/3 of the day has passed, what time is it? 🌞",
      "options": {
        "A": "4:00 AM",
        "B": "6:00 AM",
        "C": "8:00 AM",
        "D": "10:00 AM"
      },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Two trains start at the same time from stations 300 km apart. One at 60 km/h, another at 40 km/h. When they meet, how long have they traveled? 🚂",
      "options": { "A": "2 h", "B": "2.5 h", "C": "3 h", "D": "3.5 h" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "A clock shows 3:00. After how many minutes will the minute hand be exactly over the hour hand? ⏰",
      "options": {
        "A": "15 min",
        "B": "16 4/11 min",
        "C": "17 min",
        "D": "18 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "If your birthday is 100 days away, how many weeks and days is that? 🎂",
      "options": {
        "A": "14 weeks 2 days",
        "B": "14 weeks 1 day",
        "C": "13 weeks 6 days",
        "D": "15 weeks 0 days"
      },
      "correct_answer": "A"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "A worker starts at 8:30 AM, takes a 1-hour lunch at 12:30 PM, and finishes at 5:00 PM. How many hours do they work? 👷",
      "options": {
        "A": "7 h 30 min",
        "B": "7 h",
        "C": "8 h",
        "D": "8 h 30 min"
      },
      "correct_answer": "A"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "What is the angle between the hands of a clock at 7:20? 📐",
      "options": { "A": "100°", "B": "120°", "C": "130°", "D": "150°" },
      "correct_answer": "A"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "If a day on Venus is 243 Earth days, how many Venus days are in 486 Earth days? 🪐",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "B"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "A timer beeps every 45 minutes. If it first beeped at 9:00 AM, when will it beep for the 5th time? ⏲️",
      "options": {
        "A": "11:15 AM",
        "B": "11:30 AM",
        "C": "12:00 PM",
        "D": "12:45 PM"
      },
      "correct_answer": "C"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "Convert 0.75 hours into minutes. 🔄",
      "options": { "A": "30", "B": "40", "C": "45", "D": "50" },
      "correct_answer": "C"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "If February in a leap year has 29 days, how many hours are in that February? ❄️",
      "options": { "A": "672", "B": "696", "C": "720", "D": "744" },
      "correct_answer": "B"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "A concert lasted from 7:30 PM to 10:45 PM. How long was it in hours and minutes? 🎵",
      "options": {
        "A": "3 h 15 min",
        "B": "3 h 30 min",
        "C": "3 h 45 min",
        "D": "4 h"
      },
      "correct_answer": "A"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "If every second, a clock ticks twice, how many ticks in 2.5 minutes? 🔊",
      "options": { "A": "150", "B": "200", "C": "300", "D": "350" },
      "correct_answer": "C"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "At what time between 4 and 5 o'clock are the hands of a clock at right angles? ⏰",
      "options": {
        "A": "4:10",
        "B": "4:20",
        "C": "4:38 2/11",
        "D": "4:50"
      },
      "correct_answer": "C"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "Sunrise is at 6:15 AM and sunset is at 6:45 PM. What is the length of the day? 🌅🌇",
      "options": {
        "A": "12 h",
        "B": "12 h 30 min",
        "C": "13 h",
        "D": "13 h 30 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "How many minutes are there from 11:55 PM to 12:45 AM (next day)? 🌙",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "C"
    }
  ]
}