{
  "title": "Collection and Organization of Data - Grade 6 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "What is data? 🍎",
      "options": {
        "A": "Colors",
        "B": "Information",
        "C": "Pictures",
        "D": "Sounds"
      },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "How do we collect data? 🐤",
      "options": {
        "A": "Guessing",
        "B": "Surveying",
        "C": "Sleeping",
        "D": "Drawing"
      },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "What is a survey? ✏️",
      "options": {
        "A": "A game",
        "B": "Data collection",
        "C": "A test",
        "D": "A picture"
      },
      "correct_answer": "B"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "What organizes data? 📏",
      "options": { "A": "Table", "B": "Story", "C": "Song", "D": "Dance" },
      "correct_answer": "A"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "First step in data handling? 🎈",
      "options": {
        "A": "Draw graph",
        "B": "Collect data",
        "C": "Color it",
        "D": "Show friends"
      },
      "correct_answer": "B"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "What is raw data? 🔑",
      "options": {
        "A": "Cooked food",
        "B": "Unorganized data",
        "C": "Clean data",
        "D": "Final result"
      },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Why organize data? ➕",
      "options": {
        "A": "Make it messy",
        "B": "Make it clear",
        "C": "Hide it",
        "D": "Forget it"
      },
      "correct_answer": "B"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "What is a frequency table? 🚀",
      "options": {
        "A": "Music table",
        "B": "Counts data",
        "C": "Dining table",
        "D": "Study table"
      },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Tally marks represent what? 📚",
      "options": {
        "A": "Colors",
        "B": "Counts",
        "C": "Letters",
        "D": "Shapes"
      },
      "correct_answer": "B"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "How many in 卌? 🍪",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "C"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "What is data collection? 🦆",
      "options": {
        "A": "Throwing data",
        "B": "Gathering information",
        "C": "Hiding data",
        "D": "Erasing data"
      },
      "correct_answer": "B"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "Survey questions should be what? 🐘",
      "options": { "A": "Confusing", "B": "Clear", "C": "Long", "D": "Funny" },
      "correct_answer": "B"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Organized data helps in what? 🐠",
      "options": {
        "A": "Confusion",
        "B": "Understanding",
        "C": "Forgetting",
        "D": "Hiding"
      },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "What is a data point? 🎁",
      "options": {
        "A": "A dot",
        "B": "Single value",
        "C": "A line",
        "D": "A circle"
      },
      "correct_answer": "B"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "Simple way to collect data? 🏠",
      "options": {
        "A": "Ask people",
        "B": "Guess",
        "C": "Dream",
        "D": "Ignore"
      },
      "correct_answer": "A"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Data can be about what? 🃏",
      "options": {
        "A": "Anything",
        "B": "Only numbers",
        "C": "Only colors",
        "D": "Only shapes"
      },
      "correct_answer": "A"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "What does tally |||| mean? 👑",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "After collecting data, we do what? 🐇",
      "options": {
        "A": "Organize it",
        "B": "Forget it",
        "C": "Destroy it",
        "D": "Hide it"
      },
      "correct_answer": "A"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "Why use tables? 🌟",
      "options": {
        "A": "To eat on",
        "B": "To organize",
        "C": "To sleep on",
        "D": "To play on"
      },
      "correct_answer": "B"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "What is primary data? 🎯",
      "options": {
        "A": "Old data",
        "B": "Self-collected",
        "C": "Others' data",
        "D": "Wrong data"
      },
      "correct_answer": "B"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "Data: 5, 3, 7, 5, 2, 5, 3. Frequency of 5? 🧩",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "Make frequency table for: A, B, A, C, B, A, A, C. Frequency of A? 🌈",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "C"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "Tally for 7 items: 🎨",
      "options": { "A": "卌 ||", "B": "卌 |", "C": "卌 |||", "D": "卌" },
      "correct_answer": "A"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "Data: Red🔴, Blue🔵, Red, Green🟢, Blue, Red, Red. Which color most frequent? 🚗",
      "options": { "A": "Red", "B": "Blue", "C": "Green", "D": "Equal" },
      "correct_answer": "A"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Scores: 85, 90, 85, 95, 90, 85, 100, 90. Frequency of 90? 🍦",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "C"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "Organize: 3, 1, 4, 2, 3, 1, 3, 4, 2, 1. How many 1's? 🎪",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Tally marks for 12: 🧮",
      "options": {
        "A": "卌 卌 ||",
        "B": "卌 卌 |||",
        "C": "卌 ||||",
        "D": "卌 卌 |"
      },
      "correct_answer": "A"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Data: Yes✅, No❌, Yes, Yes, No, Yes, No, Yes. Frequency of No? 🏀",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "Ages: 10, 11, 10, 12, 11, 10, 11, 12, 10. Most common age? 🎭",
      "options": { "A": "10", "B": "11", "C": "12", "D": "All equal" },
      "correct_answer": "A"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "Make table for: Dog🐶, Cat🐱, Dog, Dog, Cat, Bird🐦, Dog. Frequency of Dog? 🎡",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "C"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "Data: 8, 6, 7, 8, 9, 6, 8, 7, 6, 8. Frequency of 8? 📊",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "Tally for 14 items: 🚴",
      "options": {
        "A": "卌 卌 卌",
        "B": "卌 卌 ||||",
        "C": "卌 卌 |",
        "D": "卌 卌 ||"
      },
      "correct_answer": "B"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "Colors: Blue🔵, Red🔴, Green🟢, Blue, Red, Blue, Green, Blue. Which least frequent? 🎲",
      "options": { "A": "Blue", "B": "Red", "C": "Green", "D": "All equal" },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "Data: Pass✅, Fail❌, Pass, Pass, Fail, Pass, Pass. Frequency of Pass? 🪀",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "Organize: A, B, C, A, B, A, C, A, B, A. Frequency of B? 🏓",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Tally marks for 9: 🎳",
      "options": { "A": "卌 ||||", "B": "卌 |||", "C": "卌 ||", "D": "卌 |" },
      "correct_answer": "A"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "Data: 15, 18, 15, 20, 18, 15, 22, 18, 15. Most frequent value? 🍭",
      "options": { "A": "15", "B": "18", "C": "20", "D": "22" },
      "correct_answer": "A"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "Make table: Math📐, Science🔬, Math, English📖, Science, Math, Math. Frequency of Math? 🎠",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "Data: Yes✅, No❌, Maybe🤔, Yes, No, Yes, Maybe, Yes, No. Frequency of Maybe? 🎀",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "B"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "Tally for 11 items: 🪁",
      "options": {
        "A": "卌 卌 |",
        "B": "卌 ||||",
        "C": "卌 卌 ||",
        "D": "卌 |||"
      },
      "correct_answer": "A"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "Create frequency distribution: 12, 15, 12, 18, 15, 20, 12, 15, 18, 12. Range of data? 🧠",
      "options": { "A": "5", "B": "6", "C": "7", "D": "8" },
      "correct_answer": "D"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "Grouped frequency: 0-10=5, 11-20=8, 21-30=7, 31-40=4. Total observations? 🏆",
      "options": { "A": "20", "B": "22", "C": "24", "D": "26" },
      "correct_answer": "C"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Cumulative frequency: Less than 10=8, less than 20=15, less than 30=22, less than 40=25. Frequency for 20-30? 🌟",
      "options": { "A": "5", "B": "6", "C": "7", "D": "8" },
      "correct_answer": "C"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "Relative frequency: A=0.3, B=0.4, C=0.3. If total=50, count of B? 🎯",
      "options": { "A": "15", "B": "20", "C": "25", "D": "30" },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "Data: 25, 30, 35, 40, 25, 30, 45, 25, 30, 35, 40, 25. Modal value? 🏅",
      "options": { "A": "25", "B": "30", "C": "35", "D": "40" },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "Class intervals: 0-9, 10-19, 20-29. What is class width? 🥇",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Continuous data grouped: 1.0-1.5=4, 1.5-2.0=6, 2.0-2.5=5, 2.5-3.0=3. Total items? 🏆",
      "options": { "A": "16", "B": "17", "C": "18", "D": "19" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "Two-way table: Boys👦 liking Math=12, Science=8; Girls👧 liking Math=10, Science=14. Total liking Science? 🎪",
      "options": { "A": "18", "B": "20", "C": "22", "D": "24" },
      "correct_answer": "C"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "Percentage frequency: A=25%, B=35%, C=40%. If C=80, total observations? 🧩",
      "options": { "A": "180", "B": "190", "C": "200", "D": "210" },
      "correct_answer": "C"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "Data in ascending order: 15, 18, 20, 22, 25, 28, 30. Create 3 equal groups. Middle group range? 🎨",
      "options": { "A": "15-20", "B": "18-25", "C": "20-28", "D": "22-30" },
      "correct_answer": "B"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "Frequency polygon points: (5,4), (10,8), (15,12), (20,6), (25,2). Total frequency? 🚀",
      "options": { "A": "30", "B": "32", "C": "34", "D": "36" },
      "correct_answer": "B"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "Cumulative relative frequency: <10=0.2, <20=0.5, <30=0.8, <40=1.0. Frequency for 20-30 if total=100? 🌈",
      "options": { "A": "20", "B": "30", "C": "40", "D": "50" },
      "correct_answer": "B"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "Data organized in histogram: 0-10📊=5, 10-20=8, 20-30=12, 30-40=7, 40-50=3. Modal class? 🍦",
      "options": { "A": "10-20", "B": "20-30", "C": "30-40", "D": "40-50" },
      "correct_answer": "B"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "Stem-leaf plot: 1|5,6,8; 2|0,2,3,5; 3|1,4,6. How many values in 20s? 🎡",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "C"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "Grouped data mean calculation: Midpoints=15,25,35,45; Frequencies=4,6,5,3. Approximate mean? 🎳",
      "options": {
        "A": "25.5",
        "B": "27.5",
        "C": "29.5",
        "D": "31.5"
      },
      "correct_answer": "C"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "Two-way relative frequency: Math📐 liked by 40% boys, 60% girls. If 50 boys & 50 girls, total liking Math? 🎠",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "C"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "Cumulative percentage: <50=25%, <100=60%, <150=85%, <200=100%. If total=200, frequency for 100-150? 🪀",
      "options": { "A": "40", "B": "50", "C": "60", "D": "70" },
      "correct_answer": "B"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "Data organized in pie chart📊: Sector A=90°, B=120°, C=150°. If B=60, total? 🏓",
      "options": { "A": "160", "B": "170", "C": "180", "D": "190" },
      "correct_answer": "C"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "Frequency density: Class 0-20 width=20, freq=10, density=0.5; Class 20-50 width=30, density=0.8. Frequency for 20-50? 🎭",
      "options": { "A": "20", "B": "22", "C": "24", "D": "26" },
      "correct_answer": "C"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "Organize bivariate data: (x,y) pairs: (1,2), (2,4), (3,6), (4,8), (5,10). Frequency of y=6? 🎲",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "A"
    }
  ]
}