{
  "title": "Mean, Median, Mode - Grade 6 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "What is the mean? 🍎",
      "options": {
        "A": "Middle value",
        "B": "Average",
        "C": "Most frequent",
        "D": "Highest value"
      },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "What is the median? 🐤",
      "options": {
        "A": "Average",
        "B": "Middle value",
        "C": "Most common",
        "D": "Sum"
      },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "What is the mode? ✏️",
      "options": {
        "A": "Middle value",
        "B": "Average",
        "C": "Most frequent",
        "D": "Total"
      },
      "correct_answer": "C"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "Find mean of 4 and 6 📏",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "Find median of 3, 5, 7 🎈",
      "options": { "A": "3", "B": "5", "C": "7", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "Find mode of 2, 3, 3, 4 🔑",
      "options": { "A": "2", "B": "3", "C": "4", "D": "No mode" },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Mean of 5, 10, 15? ➕",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "Median of 8, 12, 16? 🚀",
      "options": { "A": "8", "B": "12", "C": "16", "D": "14" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Mode of 1, 2, 2, 3, 4? 📚",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "B"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "Mean of 2, 4, 6, 8? 🍪",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "Median of 10, 20, 30? 🦆",
      "options": { "A": "10", "B": "20", "C": "30", "D": "25" },
      "correct_answer": "B"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "Mode of 5, 6, 6, 7, 7, 7? 🐘",
      "options": { "A": "5", "B": "6", "C": "7", "D": "6 & 7" },
      "correct_answer": "C"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Mean of 9, 18? 🐠",
      "options": { "A": "12", "B": "13.5", "C": "14", "D": "15" },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "Median of 25, 50, 75? 🎁",
      "options": { "A": "25", "B": "50", "C": "75", "D": "60" },
      "correct_answer": "B"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "Mode of 10, 10, 20, 30? 🏠",
      "options": { "A": "10", "B": "20", "C": "30", "D": "No mode" },
      "correct_answer": "A"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Mean of 1, 2, 3, 4, 5? 🃏",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "Median of 6, 9, 12, 15? 👑",
      "options": { "A": "9", "B": "10.5", "C": "12", "D": "13.5" },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "Mode of 8, 9, 9, 10, 11? 🐇",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "B"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "Mean of 40, 50, 60? 🌟",
      "options": { "A": "45", "B": "50", "C": "55", "D": "60" },
      "correct_answer": "B"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "Median of 100, 200, 300, 400? 🎯",
      "options": { "A": "200", "B": "250", "C": "300", "D": "350" },
      "correct_answer": "B"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "Find mean: 12, 15, 18, 21 🧩",
      "options": { "A": "15", "B": "16", "C": "16.5", "D": "17" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "Find median: 7, 3, 9, 5, 11 (arrange first) 🌈",
      "options": { "A": "5", "B": "7", "C": "9", "D": "11" },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "Find mode: 4, 5, 6, 4, 7, 5, 4, 8 🎨",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "A"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "Mean of first 5 natural numbers? 🚗",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Median: 14, 16, 18, 20, 22 🍦",
      "options": { "A": "16", "B": "18", "C": "20", "D": "19" },
      "correct_answer": "B"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "Mode: 10, 12, 10, 14, 12, 10, 16 🎪",
      "options": { "A": "10", "B": "12", "C": "14", "D": "16" },
      "correct_answer": "A"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Mean: 25, 30, 35, 40, 45 🧮",
      "options": { "A": "30", "B": "33", "C": "35", "D": "37" },
      "correct_answer": "C"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Median: 8, 12, 16, 20, 24, 28 🏀",
      "options": { "A": "16", "B": "18", "C": "20", "D": "22" },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "Mode: 3, 4, 5, 3, 6, 4, 3, 7, 4 🎭",
      "options": { "A": "3", "B": "4", "C": "3 & 4", "D": "5" },
      "correct_answer": "A"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "Mean of even numbers 2 to 10? 🎡",
      "options": { "A": "5", "B": "6", "C": "7", "D": "8" },
      "correct_answer": "B"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "Median: 45, 50, 55, 60, 65 📊",
      "options": { "A": "50", "B": "55", "C": "60", "D": "57.5" },
      "correct_answer": "B"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "Mode: 100, 200, 100, 300, 200, 100, 400 🚴",
      "options": { "A": "100", "B": "200", "C": "300", "D": "400" },
      "correct_answer": "A"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "Mean: 6, 9, 12, 15, 18 🎲",
      "options": { "A": "10", "B": "11", "C": "12", "D": "13" },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "Median: 22, 24, 26, 28, 30, 32 🪀",
      "options": { "A": "26", "B": "27", "C": "28", "D": "29" },
      "correct_answer": "B"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "Mode: 7, 8, 9, 7, 10, 8, 11, 7, 12 🏓",
      "options": { "A": "7", "B": "8", "C": "9", "D": "10" },
      "correct_answer": "A"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Mean of odd numbers 1 to 9? 🎳",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "Median: 35, 40, 45, 50, 55, 60 🍭",
      "options": { "A": "45", "B": "47.5", "C": "50", "D": "52.5" },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "Mode: 12, 14, 12, 16, 14, 18, 12, 20 🎠",
      "options": { "A": "12", "B": "14", "C": "16", "D": "18" },
      "correct_answer": "A"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "Mean: 11, 22, 33, 44, 55 🎀",
      "options": { "A": "30", "B": "32", "C": "33", "D": "35" },
      "correct_answer": "C"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "Median: 80, 85, 90, 95, 100, 105 🪁",
      "options": { "A": "90", "B": "92.5", "C": "95", "D": "97.5" },
      "correct_answer": "B"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "If mean of 4 numbers is 15, their sum is? 🧠",
      "options": { "A": "45", "B": "50", "C": "55", "D": "60" },
      "correct_answer": "D"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "Numbers: 12, 15, x, 21, 24. Mean=18. Find x. 🏆",
      "options": { "A": "16", "B": "17", "C": "18", "D": "19" },
      "correct_answer": "C"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Find median of: 8, 12, 16, 20, 24, 28, 32 🌟",
      "options": { "A": "18", "B": "20", "C": "22", "D": "24" },
      "correct_answer": "B"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "Mode of: 3, 5, 7, 3, 9, 5, 11, 3, 13, 5 🎯",
      "options": { "A": "3", "B": "5", "C": "3 & 5", "D": "7" },
      "correct_answer": "C"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "If mean of a, b, c is 20, mean of a, b, c, d is 25. Find d. 🏅",
      "options": { "A": "30", "B": "35", "C": "40", "D": "45" },
      "correct_answer": "C"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "Find range of: 45, 32, 67, 54, 39, 61 🥇",
      "options": { "A": "25", "B": "30", "C": "35", "D": "40" },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Mean of 5 numbers is 12. Four are: 8, 10, 14, 16. Find fifth. 🏆",
      "options": { "A": "10", "B": "11", "C": "12", "D": "13" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "Median of: 25, 30, 35, 40, 45, 50, 55, 60 🎪",
      "options": { "A": "40", "B": "42.5", "C": "45", "D": "47.5" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "hard",
      "question": "Mode of: 12, 15, 18, 12, 21, 15, 24, 12, 27, 15, 30 🧩",
      "options": { "A": "12", "B": "15", "C": "12 & 15", "D": "18" },
      "correct_answer": "A"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "If median of 3, 5, x, 9, 11 is 7, find x. 🎨",
      "options": { "A": "6", "B": "7", "C": "8", "D": "9" },
      "correct_answer": "B"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "Find mean deviation from mean for: 4, 8, 12, 16, 20 🚀",
      "options": { "A": "4", "B": "4.8", "C": "5", "D": "5.2" },
      "correct_answer": "B"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "Numbers: 18, 22, x, 30, 34. Mean=25. Find median. 🌈",
      "options": {
        "A": "22",
        "B": "24",
        "C": "26",
        "D": "28"
      },
      "correct_answer": "A"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "If mode is 15 and numbers are: 10, 15, 20, 15, x, 25. Find x. 🍦",
      "options": { "A": "10", "B": "15", "C": "20", "D": "25" },
      "correct_answer": "B"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "Find interquartile range: 10, 15, 20, 25, 30, 35, 40 🎡",
      "options": { "A": "15", "B": "20", "C": "25", "D": "30" },
      "correct_answer": "B"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "If mean of a, b, c, d, e is 24, find mean of a+2, b+2, c+2, d+2, e+2 🎳",
      "options": { "A": "24", "B": "25", "C": "26", "D": "27" },
      "correct_answer": "C"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "Find median of first 10 prime numbers 🎠",
      "options": { "A": "11", "B": "12", "C": "13", "D": "14" },
      "correct_answer": "B"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "Mode of: 5, 8, 5, 12, 8, 5, 16, 8, 5, 20 🪀",
      "options": { "A": "5", "B": "8", "C": "5 & 8", "D": "12" },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "If mean of 6 numbers is 18 and five are: 12, 15, 20, 22, 25, find sixth 🏓",
      "options": {
        "A": "14",
        "B": "15",
        "C": "16",
        "D": "18"
      },
      "correct_answer": "A"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "Find range and mean of: 28, 34, 41, 19, 53, 37 🎭",
      "options": {
        "A": "Range=34, Mean=35.3",
        "B": "Range=34, Mean=36.3",
        "C": "Range=35, Mean=35.3",
        "D": "Range=35, Mean=36.3"
      },
      "correct_answer": "A"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "If median of 4, 7, x, 13, 16 is 10, and mode is 7, find x 🎲",
      "options": {
        "A": "7",
        "B": "10",
        "C": "13",
        "D": "16"
      },
      "correct_answer": "B"
    }
  ]
}