{
  "title": "Bar Graphs and Histograms (Data Handling) - Grade 5 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "📊 shows favorite fruits: 🍎=4, 🍌=6, 🍇=3. Which fruit is most popular?",
      "options": { "A": "🍎", "B": "🍌", "C": "🍇", "D": "🍓" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "In a bar graph, 🐶=5, 🐱=8, 🐰=4. How many more 🐱 than 🐰?",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "📈 shows books read: Jan=3, Feb=5, Mar=4. Total books?",
      "options": { "A": "10", "B": "11", "C": "12", "D": "13" },
      "correct_answer": "C"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "Bar heights: Math=7, Science=9, English=6. Which subject has lowest bar?",
      "options": {
        "A": "Math",
        "B": "Science",
        "C": "English",
        "D": "All same"
      },
      "correct_answer": "C"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "🍪 sales: Day1=8, Day2=6, Day3=9. Which day had most sales?",
      "options": { "A": "Day1", "B": "Day2", "C": "Day3", "D": "Day4" },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "📊 shows colors: Red=5, Blue=7, Green=4. How many chose Blue or Green?",
      "options": { "A": "9", "B": "10", "C": "11", "D": "12" },
      "correct_answer": "C"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Sports: ⚽=10, 🏀=8, 🎾=6. Difference between ⚽ and 🎾?",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "C"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "Weather days: ☀️=12, ☁️=8, 🌧️=5. Total days recorded?",
      "options": { "A": "23", "B": "24", "C": "25", "D": "26" },
      "correct_answer": "C"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "📊 shows ages: 5yr=4, 6yr=7, 7yr=5. Most common age?",
      "options": { "A": "5", "B": "6", "C": "7", "D": "8" },
      "correct_answer": "B"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "Ice cream: 🍦=9, 🍧=6, 🍨=8. Which has middle height bar?",
      "options": { "A": "🍦", "B": "🍧", "C": "🍨", "D": "None" },
      "correct_answer": "C"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "Transport: 🚗=15, 🚲=10, 🚌=12. How many more 🚗 than 🚲?",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "📈 shows scores: Test1=8, Test2=9, Test3=7. Average bar height?",
      "options": { "A": "7", "B": "8", "C": "9", "D": "10" },
      "correct_answer": "B"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Pets: 🐠=3, 🐦=5, 🐢=2. Total pets?",
      "options": { "A": "9", "B": "10", "C": "11", "D": "12" },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "📊 shows months: Jan=6, Feb=4, Mar=7. Which month bar is shortest?",
      "options": { "A": "Jan", "B": "Feb", "C": "Mar", "D": "Apr" },
      "correct_answer": "B"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "Drinks: 🥛=8, 🍹=6, 🍵=9. Which drink bar is tallest?",
      "options": { "A": "🥛", "B": "🍹", "C": "🍵", "D": "All same" },
      "correct_answer": "C"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Hobbies: 🎨=7, 🎮=10, 📚=8. Difference between highest and lowest?",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "📈 shows hours: Sleep=9, School=6, Play=4. Total hours shown?",
      "options": { "A": "18", "B": "19", "C": "20", "D": "21" },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "Shapes: ⬜=5, 🔺=8, ⚪=6. Which shape bar is in middle?",
      "options": { "A": "⬜", "B": "🔺", "C": "⚪", "D": "All same" },
      "correct_answer": "C"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "📊 shows grades: A=12, B=9, C=6. How many As and Bs total?",
      "options": { "A": "20", "B": "21", "C": "22", "D": "23" },
      "correct_answer": "B"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "Seasons: 🌸=8, ☀️=12, 🍂=7, ❄️=5. Which season has shortest bar?",
      "options": { "A": "🌸", "B": "☀️", "C": "🍂", "D": "❄️" },
      "correct_answer": "D"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "📊 shows age groups: 5-6yr=8, 7-8yr=12, 9-10yr=9. Total children in 5-8yr?",
      "options": { "A": "18", "B": "19", "C": "20", "D": "21" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "Histogram shows scores: 0-10=4, 11-20=7, 21-30=5. How many scored 11-30?",
      "options": { "A": "11", "B": "12", "C": "13", "D": "14" },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "📈 shows temperature ranges: 20-25°C=6, 26-30°C=9, 31-35°C=4. Most common range?",
      "options": {
        "A": "20-25°C",
        "B": "26-30°C",
        "C": "31-35°C",
        "D": "All equal"
      },
      "correct_answer": "B"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "Bar graph: Class A=15, B=12, C=18, D=14. Which class has 3 more than B?",
      "options": {
        "A": "A",
        "B": "B",
        "C": "C",
        "D": "D"
      },
      "correct_answer": "A"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Histogram intervals: 0-5=3, 6-10=7, 11-15=6. Total observations?",
      "options": { "A": "15", "B": "16", "C": "17", "D": "18" },
      "correct_answer": "B"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "📊 shows weight groups: 20-25kg=8, 26-30kg=11, 31-35kg=7. Difference between highest and lowest group?",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Double bar graph: Boys 🎮=9, Girls 🎮=6; Boys 📚=7, Girls 📚=10. Total boys?",
      "options": { "A": "15", "B": "16", "C": "17", "D": "18" },
      "correct_answer": "B"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Histogram: Height 100-110cm=5, 111-120cm=8, 121-130cm=6. How many under 121cm?",
      "options": { "A": "12", "B": "13", "C": "14", "D": "15" },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "📈 shows weekly sales: Week1-3=12, Week4-6=15, Week7-9=11. Average per 3-week period?",
      "options": {
        "A": "12.5",
        "B": "12.67",
        "C": "13",
        "D": "12.33"
      },
      "correct_answer": "B"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "Bar graph comparison: 🍎 Summer=20, Winter=15; 🍌 Summer=18, Winter=12. Total 🍎 sold?",
      "options": { "A": "33", "B": "34", "C": "35", "D": "36" },
      "correct_answer": "C"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "Histogram age: 5-7=9, 8-10=14, 11-13=8. What percent are 8-10? (approx)",
      "options": { "A": "40%", "B": "45%", "C": "50%", "D": "55%" },
      "correct_answer": "B"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "📊 shows test scores: 0-25%=4, 26-50%=9, 51-75%=12, 76-100%=8. How many passed (>50%)?",
      "options": { "A": "18", "B": "19", "C": "20", "D": "21" },
      "correct_answer": "C"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "Double bar: Math Boys=8, Girls=10; Science Boys=9, Girls=7. Total students in Math?",
      "options": { "A": "17", "B": "18", "C": "19", "D": "20" },
      "correct_answer": "B"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "Histogram rainfall: 0-10mm=5, 11-20mm=8, 21-30mm=6, 31-40mm=4. Days with >20mm?",
      "options": { "A": "9", "B": "10", "C": "11", "D": "12" },
      "correct_answer": "B"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "📈 shows book pages: 0-50=3, 51-100=7, 101-150=9, 151-200=5. Books with 100+ pages?",
      "options": { "A": "13", "B": "14", "C": "15", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Bar graph: Game1=18, Game2=15, Game3=22, Game4=19. Game3 is how much more than average?",
      "options": {
        "A": "3",
        "B": "3.5",
        "C": "4",
        "D": "5"
      },
      "correct_answer": "B"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "Histogram time: 0-30min=6, 31-60min=10, 61-90min=7. Total hours represented?",
      "options": {
        "A": "10.5",
        "B": "11",
        "C": "11.5",
        "D": "12"
      },
      "correct_answer": "C"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "📊 shows distances: 0-5km=8, 6-10km=12, 11-15km=9. What fraction are 6-10km?",
      "options": { "A": "12/29", "B": "12/30", "C": "12/31", "D": "12/32" },
      "correct_answer": "A"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "Double bar: TV Boys=2hr, Girls=1hr; Study Boys=3hr, Girls=4hr. Total hours for boys?",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "Histogram marks: 0-20=2, 21-40=5, 41-60=8, 61-80=6, 81-100=4. How many scored 41-80?",
      "options": { "A": "13", "B": "14", "C": "15", "D": "16" },
      "correct_answer": "B"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "📊 shows overlapping bars: 🍎 Morning=15, Evening=10; 🍌 Morning=12, Evening=14. Total 🍌 sold?",
      "options": { "A": "25", "B": "26", "C": "27", "D": "28" },
      "correct_answer": "B"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "Histogram with unequal intervals: 0-10=8, 11-30=15, 31-50=12. Average per unit range?",
      "options": {
        "A": "0.8, 0.75, 0.6",
        "B": "0.8, 0.5, 0.4",
        "C": "0.8, 0.75, 0.5",
        "D": "0.8, 0.5, 0.6"
      },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Stacked bar: Class5 Total=25 (Boys=14), Class6 Total=30 (Boys=18). Total Girls?",
      "options": { "A": "21", "B": "22", "C": "23", "D": "24" },
      "correct_answer": "C"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "Comparative histogram: School A: 0-10marks=4, 11-20=7; School B: 0-10=3, 11-20=9. Total 11-20 marks?",
      "options": { "A": "15", "B": "16", "C": "17", "D": "18" },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "📈 shows cumulative data: After Bar1=8, Bar2=15, Bar3=24. Value of Bar3 alone?",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "B"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "Double histogram: Age 5-7: GroupX=6, GroupY=8; Age 8-10: GroupX=9, GroupY=7. Total GroupX?",
      "options": { "A": "14", "B": "15", "C": "16", "D": "17" },
      "correct_answer": "B"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Percentage bar: Section A=40% of 50, Section B=60% of 50. Actual difference?",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "Histogram with gaps: 0-5=0, 6-10=7, 11-15=9, 16-20=0. Total observations?",
      "options": { "A": "15", "B": "16", "C": "17", "D": "18" },
      "correct_answer": "B"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "📊 shows proportional bars: If Bar1=12 represents 24 items, Bar2=18 represents?",
      "options": { "A": "34", "B": "35", "C": "36", "D": "37" },
      "correct_answer": "C"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "Composite bar: Out of total 40, 🍎=25%, 🍌=35%, rest 🍇. 🍇 count?",
      "options": { "A": "14", "B": "15", "C": "16", "D": "17" },
      "correct_answer": "C"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "Histogram with frequency density: Interval 0-10: freq=8, density=0.8; 11-25: density=0.6, what's freq?",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "B"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "📈 shows increasing bars: Bar1=5, Bar2=8, Bar3=12, Bar4=17. Pattern increase?",
      "options": {
        "A": "+3,+4,+5",
        "B": "+3,+4,+6",
        "C": "+3,+5,+5",
        "D": "+3,+5,+6"
      },
      "correct_answer": "A"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "Double bar comparison: Winter 🍎=20, 🍌=15; Summer 🍎=25, 🍌=20. % increase 🍌 from winter to summer?",
      "options": { "A": "25%", "B": "30%", "C": "33.33%", "D": "40%" },
      "correct_answer": "C"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "Histogram with missing data: Total=50, 0-10=12, 11-20=15, 31-40=11, rest in 21-30. 21-30 value?",
      "options": { "A": "10", "B": "11", "C": "12", "D": "13" },
      "correct_answer": "C"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "📊 shows ratio bars: Bar A:Bar B = 3:4. If Bar A=15, Bar B=?",
      "options": { "A": "18", "B": "19", "C": "20", "D": "21" },
      "correct_answer": "C"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "Stacked histogram: Category X has parts: A=8, B=12, C=6; Category Y: A=10, B=9, C=8. Total B?",
      "options": { "A": "20", "B": "21", "C": "22", "D": "23" },
      "correct_answer": "B"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "Percentage histogram: 0-20=20%, 21-40=30%, 41-60=25%, rest 61-80. If total=80, 61-80 count?",
      "options": { "A": "18", "B": "19", "C": "20", "D": "21" },
      "correct_answer": "C"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "📈 shows weighted bars: Bar1 weight=2, value=10; Bar2 weight=3, value=15. Weighted average?",
      "options": { "A": "12", "B": "13", "C": "14", "D": "15" },
      "correct_answer": "B"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "Comparative histogram with scaling: Graph1 uses 1cm=5units, Graph2 uses 1cm=3units. If same data shows Bar=4cm in both, actual values?",
      "options": {
        "A": "20 and 12",
        "B": "15 and 9",
        "C": "25 and 15",
        "D": "30 and 18"
      },
      "correct_answer": "A"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "📊 shows composite data: Total students=120. Bar1=1/3, Bar2=1/4, Bar3=rest. Bar3 value?",
      "options": { "A": "48", "B": "50", "C": "52", "D": "54" },
      "correct_answer": "B"
    }
  ]
}