{
  "title": "Line Graphs - Grade 4 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "📈 Line graph shows temperature: Monday=25°C, Tuesday=28°C. How much did temperature increase? 🌡️",
      "options": { "A": "2°C", "B": "3°C", "C": "4°C", "D": "5°C" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "📉 Graph shows books read: Week 1=8, Week 2=12. How many more books in Week 2? 📚",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "📊 Line goes up from 10 to 15. What's the increase?",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "📈 Graph shows: Day 1=20 apples, Day 2=25 apples. Total apples? 🍎",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "B"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "📉 Line drops from 30 to 25. What's the decrease?",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "📈 Temperature: 8AM=20°C, 12PM=26°C. Temperature rise? ☀️",
      "options": { "A": "5°C", "B": "6°C", "C": "7°C", "D": "8°C" },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "📉 Sales: Monday=15, Tuesday=12. How many fewer on Tuesday? 🛒",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "📈 Graph points: (1,5), (2,8). What's the increase in y?",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "📉 Height: Year 1=100cm, Year 2=110cm. Growth? 📏",
      "options": { "A": "8cm", "B": "9cm", "C": "10cm", "D": "11cm" },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "📈 Marks: Test 1=75, Test 2=85. Improvement? 📝",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "📉 Rainfall: June=12cm, July=8cm. Decrease? 🌧️",
      "options": { "A": "3cm", "B": "4cm", "C": "5cm", "D": "6cm" },
      "correct_answer": "B"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "📈 Distance: Day 1=5km, Day 2=7km. Extra distance? 🏃",
      "options": { "A": "1km", "B": "2km", "C": "3km", "D": "4km" },
      "correct_answer": "B"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "📉 Weight: Start=30kg, End=28kg. Loss? ⚖️",
      "options": { "A": "1kg", "B": "2kg", "C": "3kg", "D": "4kg" },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "📈 Money: Week 1=₹50, Week 2=₹70. Increase? 💰",
      "options": { "A": "₹15", "B": "₹18", "C": "₹20", "D": "₹22" },
      "correct_answer": "C"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "📉 Visitors: Saturday=45, Sunday=35. Decrease? 👥",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "📈 Speed: Car A=40km/h, Car B=50km/h. Difference? 🚗",
      "options": { "A": "8km/h", "B": "9km/h", "C": "10km/h", "D": "11km/h" },
      "correct_answer": "C"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "📉 Temperature: Day=32°C, Night=26°C. Drop? 🌙",
      "options": { "A": "5°C", "B": "6°C", "C": "7°C", "D": "8°C" },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "📈 Score: Game 1=18, Game 2=24. Increase? 🎮",
      "options": { "A": "5", "B": "6", "C": "7", "D": "8" },
      "correct_answer": "B"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "📉 Production: Factory A=120, Factory B=110. Difference? 🏭",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "📈 Graph shows steady increase from 10 to 25 over 3 points. Average increase per step?",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "📈 Line graph shows temperature over 5 days: 22°C, 24°C, 26°C, 23°C, 25°C. What was the highest temperature? 🌡️",
      "options": { "A": "24°C", "B": "25°C", "C": "26°C", "D": "27°C" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "📉 Rainfall graph: Mon=5mm, Tue=8mm, Wed=12mm, Thu=10mm, Fri=7mm. Which day had most rain? 🌧️",
      "options": {
        "A": "Tuesday",
        "B": "Wednesday",
        "C": "Thursday",
        "D": "Friday"
      },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "📈 Sales over week: 15, 20, 18, 25, 22, 30, 28. What was sold on Thursday if Monday=15?",
      "options": { "A": "18", "B": "22", "C": "25", "D": "28" },
      "correct_answer": "C"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "📉 Study hours: Mon=2, Tue=3, Wed=4, Thu=3, Fri=2. Total hours studied? 📚",
      "options": { "A": "12", "B": "13", "C": "14", "D": "15" },
      "correct_answer": "C"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "📈 Plant growth (cm): Week1=5, Week2=8, Week3=12, Week4=15. How much grew from Week2 to Week4? 🌱",
      "options": { "A": "5cm", "B": "6cm", "C": "7cm", "D": "8cm" },
      "correct_answer": "C"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "📉 Attendance: 28, 30, 32, 29, 31, 33. What's the pattern in numbers?",
      "options": {
        "A": "Increasing",
        "B": "Decreasing",
        "C": "Fluctuating",
        "D": "Constant"
      },
      "correct_answer": "C"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "📈 Distance walked: Day1=3km, Day2=4km, Day3=5km, Day4=6km. If pattern continues, Day5=? 🚶",
      "options": { "A": "6km", "B": "7km", "C": "8km", "D": "9km" },
      "correct_answer": "B"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "📉 Temperature at 3 hours: 9AM=24°C, 12PM=28°C, 3PM=31°C, 6PM=27°C. When was it hottest? ☀️",
      "options": { "A": "9AM", "B": "12PM", "C": "3PM", "D": "6PM" },
      "correct_answer": "C"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "📈 Scores: Test1=65, Test2=70, Test3=75, Test4=80. What will Test5 be if pattern continues? 📝",
      "options": { "A": "82", "B": "83", "C": "84", "D": "85" },
      "correct_answer": "D"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "📉 Water level (cm): 120, 115, 110, 105, 100. What's the decrease each time? 💧",
      "options": { "A": "3cm", "B": "4cm", "C": "5cm", "D": "6cm" },
      "correct_answer": "C"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "📈 Population: Year1=500, Year2=550, Year3=600, Year4=650. What's the yearly increase? 👨‍👩‍👧‍👦",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "C"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "📉 Height chart: Month1=1.2m, Month2=1.22m, Month3=1.25m, Month4=1.27m. Total growth in 4 months? 📏",
      "options": { "A": "0.05m", "B": "0.06m", "C": "0.07m", "D": "0.08m" },
      "correct_answer": "C"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "📈 Sales trend: 20, 25, 30, 35, 40. What type of line would this create?",
      "options": {
        "A": "Horizontal",
        "B": "Upward sloping",
        "C": "Downward sloping",
        "D": "Zigzag"
      },
      "correct_answer": "B"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "📉 Battery life: 100%, 90%, 80%, 70%. How much % decreases each hour? 🔋",
      "options": { "A": "8%", "B": "9%", "C": "10%", "D": "11%" },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "📈 Running speed: Lap1=5min, Lap2=4.5min, Lap3=4min, Lap4=3.5min. Improvement from Lap1 to Lap4? 🏃",
      "options": { "A": "1.0min", "B": "1.5min", "C": "2.0min", "D": "2.5min" },
      "correct_answer": "B"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "📉 Price drop: ₹100, ₹95, ₹90, ₹85. Next price if pattern continues? 💵",
      "options": { "A": "₹80", "B": "₹82", "C": "₹84", "D": "₹86" },
      "correct_answer": "A"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "📈 Temperature change: 6AM=18°C, 9AM=22°C, 12PM=26°C, 3PM=30°C. Increase per 3 hours?",
      "options": { "A": "3°C", "B": "4°C", "C": "5°C", "D": "6°C" },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "📉 Visitors to park: 120, 110, 100, 90, 80. Decrease pattern per day? 🌳",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "📈 Test scores: 60, 65, 70, 75, 80. If student continues improving, next test score?",
      "options": { "A": "82", "B": "83", "C": "84", "D": "85" },
      "correct_answer": "D"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "📉 Water consumption: 50L, 48L, 46L, 44L, 42L. Daily savings in water? 💧",
      "options": { "A": "1L", "B": "2L", "C": "3L", "D": "4L" },
      "correct_answer": "B"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "📈 Complex line graph shows: Plant A grows 2cm/day, Plant B grows 3cm/day. Starting at 10cm each, what's difference after 5 days? 🌱",
      "options": { "A": "3cm", "B": "4cm", "C": "5cm", "D": "6cm" },
      "correct_answer": "C"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "📉 Two lines: Car A speed=40,45,50,55. Car B speed=50,48,46,44. When will they have same speed if trends continue? 🚗",
      "options": {
        "A": "Never",
        "B": "Next point",
        "C": "In 2 points",
        "D": "In 3 points"
      },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "📈 Temperature line crosses rainfall line at 25°C with 10mm rain. What does this mean? 🌡️🌧️",
      "options": {
        "A": "Highest temperature",
        "B": "Temperature equals rainfall",
        "C": "Intersection point",
        "D": "Lowest rainfall"
      },
      "correct_answer": "C"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "📉 Graph shows profit: Jan=₹5000, Feb=₹5500, Mar=₹6000, Apr=₹6500. If growth continues, July profit? 💰",
      "options": { "A": "₹7500", "B": "₹8000", "C": "₹8500", "D": "₹9000" },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "📈 Two students: Riya's scores: 70,75,80,85. Sam's scores: 65,70,75,80. After how many tests will difference remain same? 📝",
      "options": {
        "A": "Always same",
        "B": "After 2 tests",
        "C": "After 3 tests",
        "D": "Never same"
      },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "📉 Company A sales: 100,110,120,130. Company B: 150,145,140,135. When will Company A overtake B if trends continue? 📊",
      "options": {
        "A": "Next quarter",
        "B": "In 2 quarters",
        "C": "In 3 quarters",
        "D": "Never"
      },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "📈 Water in Tank A decreases by 5L/hour from 100L. Tank B increases by 3L/hour from 20L. When will they have equal water? ⚖️",
      "options": {
        "A": "5 hours",
        "B": "8 hours",
        "C": "10 hours",
        "D": "12 hours"
      },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "📉 Distance-time graph: Object moves 10m in 1s, 20m in 2s, 30m in 3s. What's the speed? 🏃",
      "options": { "A": "8m/s", "B": "9m/s", "C": "10m/s", "D": "11m/s" },
      "correct_answer": "C"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "📈 Population: City A grows by 500/year from 10,000. City B grows by 800/year from 8,000. When will City B surpass A? 🏙️",
      "options": {
        "A": "5 years",
        "B": "6 years",
        "C": "7 years",
        "D": "8 years"
      },
      "correct_answer": "C"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "📉 Temperature oscillates: 20°C, 25°C, 20°C, 25°C, 20°C. What's the pattern? 🔄",
      "options": {
        "A": "Increasing",
        "B": "Decreasing",
        "C": "Alternating",
        "D": "Random"
      },
      "correct_answer": "C"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "📈 Investment: ₹1000 grows ₹100/month. Savings: ₹2000 grows ₹50/month. When will investment surpass savings? 💹",
      "options": {
        "A": "10 months",
        "B": "15 months",
        "C": "20 months",
        "D": "25 months"
      },
      "correct_answer": "C"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "📉 Two lines: Line 1 has points (1,2), (2,4), (3,6). Line 2 has (1,5), (2,4), (3,3). Where do they intersect? ✖️",
      "options": { "A": "(2,3)", "B": "(2,4)", "C": "(2,5)", "D": "(3,4)" },
      "correct_answer": "B"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "📈 Plant growth: Type A: 2cm/week from 10cm. Type B: 3cm/week from 5cm. When will both be same height? 🌿",
      "options": {
        "A": "3 weeks",
        "B": "4 weeks",
        "C": "5 weeks",
        "D": "6 weeks"
      },
      "correct_answer": "C"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "📉 Water flow: Pipe A fills 10L/min from empty. Pipe B drains 5L/min from 100L. When will tank be half full? 🚰",
      "options": {
        "A": "5 min",
        "B": "6.67 min",
        "C": "7.5 min",
        "D": "10 min"
      },
      "correct_answer": "B"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "📈 Sales comparison: Product X: 50,55,60,65. Product Y: 70,65,60,55. When did they sell equal units? 📦",
      "options": { "A": "Week 2", "B": "Week 3", "C": "Week 4", "D": "Never" },
      "correct_answer": "B"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "📉 Distance between cars: Car1 at 60km/h, Car2 at 50km/h starting together. How does distance graph look? 🚗🚙",
      "options": {
        "A": "Horizontal",
        "B": "Upward sloping",
        "C": "Downward sloping",
        "D": "Curved"
      },
      "correct_answer": "B"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "📈 Temperature vs Ice cream sales: As temp rises, sales rise. What's this relationship? ☀️🍦",
      "options": {
        "A": "Direct proportion",
        "B": "Inverse proportion",
        "C": "No relation",
        "D": "Random"
      },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "📉 Bank balance: Starts at ₹5000, withdraw ₹200/week, deposit ₹100/week. What's net weekly change? 🏦",
      "options": { "A": "-₹50", "B": "-₹100", "C": "-₹150", "D": "-₹200" },
      "correct_answer": "B"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "📈 Two lines parallel: One at y=2x+1, other at y=2x+3. What's always true? ⏸️",
      "options": {
        "A": "They intersect",
        "B": "Same slope",
        "C": "Same intercept",
        "D": "Perpendicular"
      },
      "correct_answer": "B"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "📉 Complex pattern: 1,3,6,10,15. What's next number? (Hint: add increasing numbers) 🔢",
      "options": { "A": "18", "B": "20", "C": "21", "D": "24" },
      "correct_answer": "C"
    }
  ]
}