{
  "title": "Standard Form of Rational Numbers - Grade 7 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "What is the standard form of 12/18? ✨",
      "options": { "A": "6/9", "B": "2/3", "C": "3/4", "D": "4/6" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "The standard form of -15/20 is: 🎯",
      "options": { "A": "-3/4", "B": "-15/20", "C": "3/4", "D": "-5/10" },
      "correct_answer": "A"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "Which is in standard form? ✅",
      "options": { "A": "4/10", "B": "2/5", "C": "6/15", "D": "8/20" },
      "correct_answer": "B"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "Simplify to standard form: 24/36",
      "options": { "A": "12/18", "B": "6/9", "C": "2/3", "D": "4/6" },
      "correct_answer": "C"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "The standard form of 7/28 is: 🧮",
      "options": { "A": "1/4", "B": "7/28", "C": "3.5/14", "D": "2/8" },
      "correct_answer": "A"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "Which rational number is NOT in standard form? ❌",
      "options": { "A": "3/5", "B": "-4/7", "C": "9/12", "D": "-11/13" },
      "correct_answer": "C"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "What is the standard form of -9/27? 🌀",
      "options": { "A": "-1/3", "B": "-3/9", "C": "-9/27", "D": "1/3" },
      "correct_answer": "A"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "The standard form of 0/5 is: 0️⃣",
      "options": {
        "A": "0/1",
        "B": "0/5",
        "C": "5/0",
        "D": "Does not exist"
      },
      "correct_answer": "A"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Simplify 16/24 to its lowest terms. 🔽",
      "options": { "A": "8/12", "B": "4/6", "C": "2/3", "D": "1/2" },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "Which is the correct standard form of 30/-45? 🤔",
      "options": { "A": "2/-3", "B": "-2/3", "C": "6/-9", "D": "-30/45" },
      "correct_answer": "B"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "The standard form of a rational number has: 📝",
      "options": {
        "A": "Numerator and denominator as integers",
        "B": "Denominator as positive integer",
        "C": "No common factor except 1",
        "D": "All of these"
      },
      "correct_answer": "D"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "Convert 25/100 to standard form. 🎯",
      "options": { "A": "1/4", "B": "5/20", "C": "10/40", "D": "25/100" },
      "correct_answer": "A"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "What is the standard form of -14/21? ❄️",
      "options": { "A": "-2/3", "B": "-7/10.5", "C": "-14/21", "D": "-1/1.5" },
      "correct_answer": "A"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "Which of these is in standard form? ✔️",
      "options": { "A": "8/12", "B": "15/25", "C": "9/16", "D": "22/33" },
      "correct_answer": "C"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "The standard form of 49/63 is: 🧩",
      "options": { "A": "7/9", "B": "14/18", "C": "21/27", "D": "49/63" },
      "correct_answer": "A"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Express -36/54 in standard form. 🔄",
      "options": { "A": "-2/3", "B": "-12/18", "C": "-6/9", "D": "-4/6" },
      "correct_answer": "A"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "A rational number is in standard form when the denominator is: 📌",
      "options": {
        "A": "Negative",
        "B": "Positive",
        "C": "Zero",
        "D": "Decimal"
      },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "The standard form of 0.75 is: 🎯",
      "options": { "A": "75/100", "B": "3/4", "C": "7.5/10", "D": "15/20" },
      "correct_answer": "B"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "Which number should be in the denominator in standard form? 🔽",
      "options": {
        "A": "A negative integer",
        "B": "A positive integer",
        "C": "Zero",
        "D": "One"
      },
      "correct_answer": "B"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "Convert 18/-24 to standard form. ➖",
      "options": { "A": "3/-4", "B": "-3/4", "C": "9/-12", "D": "-18/24" },
      "correct_answer": "B"
    },
    {
      "id": 21,
      "difficulty": "medium",
      "question": "What is the standard form of 121/-66? 🧮",
      "options": { "A": "11/-6", "B": "-11/6", "C": "-121/66", "D": "121/66" },
      "correct_answer": "B"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "The standard form of 0.625 is: 🎯",
      "options": { "A": "625/1000", "B": "5/8", "C": "62.5/100", "D": "25/40" },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "Express -1.25 as a rational number in standard form. 🔄",
      "options": { "A": "-125/100", "B": "-5/4", "C": "-25/20", "D": "-1 1/4" },
      "correct_answer": "B"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "Which of the following is NOT in standard form? ❌",
      "options": { "A": "-7/11", "B": "13/-17", "C": "8/15", "D": "-3/19" },
      "correct_answer": "B"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "The standard form of 2.4 is: ✨",
      "options": { "A": "24/10", "B": "12/5", "C": "6/2.5", "D": "240/100" },
      "correct_answer": "B"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "Convert 1.2 to a rational number in standard form. 🔢",
      "options": { "A": "12/10", "B": "6/5", "C": "3/2.5", "D": "120/100" },
      "correct_answer": "B"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "What is the standard form of -0.08? 🧊",
      "options": { "A": "-8/100", "B": "-4/50", "C": "-2/25", "D": "-1/12.5" },
      "correct_answer": "C"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Express 3.6 as a fraction in simplest form. 🎯",
      "options": { "A": "36/10", "B": "18/5", "C": "9/2.5", "D": "360/100" },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "The rational number -42/56 in standard form is: 🔍",
      "options": { "A": "-3/4", "B": "-21/28", "C": "-6/8", "D": "-1.5/2" },
      "correct_answer": "A"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "Which rational number is equivalent to 0.333... in standard form? 🔄",
      "options": { "A": "1/3", "B": "3/9", "C": "33/100", "D": "333/1000" },
      "correct_answer": "A"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "Convert -5.5 to standard rational form. ➖",
      "options": {
        "A": "-55/10",
        "B": "-11/2",
        "C": "-5 1/2",
        "D": "-550/100"
      },
      "correct_answer": "B"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "The standard form of 144/216 is: 🧩",
      "options": { "A": "12/18", "B": "2/3", "C": "48/72", "D": "72/108" },
      "correct_answer": "B"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "Express 0.72 as a fraction in lowest terms. 🎯",
      "options": { "A": "72/100", "B": "36/50", "C": "18/25", "D": "9/12.5" },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "What is the standard form of 1.44? ✨",
      "options": { "A": "144/100", "B": "36/25", "C": "72/50", "D": "12/10" },
      "correct_answer": "B"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "The standard form of -60/84 is: 🔄",
      "options": { "A": "-5/7", "B": "-15/21", "C": "-30/42", "D": "-10/14" },
      "correct_answer": "A"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Which is the standard form of 0.125? 🎯",
      "options": { "A": "125/1000", "B": "1/8", "C": "5/40", "D": "2.5/20" },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "medium",
      "question": "Express -2.8 in standard rational form. ❄️",
      "options": {
        "A": "-28/10",
        "B": "-14/5",
        "C": "-7/2.5",
        "D": "-280/100"
      },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "The standard form of 225/315 is: 🧮",
      "options": { "A": "15/21", "B": "5/7", "C": "45/63", "D": "75/105" },
      "correct_answer": "B"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "Convert 0.64 to a fraction in simplest form. 🔄",
      "options": { "A": "64/100", "B": "32/50", "C": "16/25", "D": "8/12.5" },
      "correct_answer": "C"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "What is the standard form of -1.6? ➖",
      "options": { "A": "-16/10", "B": "-8/5", "C": "-4/2.5", "D": "-160/100" },
      "correct_answer": "B"
    },
    {
      "id": 41,
      "difficulty": "hard",
      "question": "Express 0.245 as a rational number in standard form. 🧩",
      "options": {
        "A": "245/1000",
        "B": "49/200",
        "C": "24.5/100",
        "D": "12.25/50"
      },
      "correct_answer": "B"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "The standard form of 0.428571... (repeating 428571) is: 🔄",
      "options": { "A": "3/7", "B": "428571/999999", "C": "6/14", "D": "9/21" },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Convert -3.75 to a rational number in standard form. ❄️",
      "options": {
        "A": "-375/100",
        "B": "-15/4",
        "C": "-7.5/2",
        "D": "-3 3/4"
      },
      "correct_answer": "B"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "What is the standard form of 1.125? ✨",
      "options": { "A": "1125/1000", "B": "225/200", "C": "45/40", "D": "9/8" },
      "correct_answer": "D"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "Express 0.05 as a fraction in lowest terms. 🎯",
      "options": { "A": "5/100", "B": "1/20", "C": "0.5/10", "D": "50/1000" },
      "correct_answer": "B"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "The standard form of -77/91 is: 🔍",
      "options": {
        "A": "-7/8.27",
        "B": "-11/13",
        "C": "-77/91",
        "D": "-1.1/1.3"
      },
      "correct_answer": "B"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Which rational number in standard form is equal to 0.15? 🔄",
      "options": { "A": "3/20", "B": "15/100", "C": "1.5/10", "D": "150/1000" },
      "correct_answer": "A"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "Express 2.25 as a mixed number in simplest form. 🎯",
      "options": {
        "A": "2 1/4",
        "B": "2 25/100",
        "C": "2 5/20",
        "D": "2 2.5/10"
      },
      "correct_answer": "A"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "The standard form of 0.375 is: 🧩",
      "options": { "A": "375/1000", "B": "75/200", "C": "15/40", "D": "3/8" },
      "correct_answer": "D"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "Convert -4.2 to a rational number in standard form. ➖",
      "options": {
        "A": "-42/10",
        "B": "-21/5",
        "C": "-8.4/2",
        "D": "-2.1/0.5"
      },
      "correct_answer": "B"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "What is the standard form of 1.8? ✨",
      "options": { "A": "18/10", "B": "9/5", "C": "3.6/2", "D": "180/100" },
      "correct_answer": "B"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "Express 0.84 as a fraction in simplest form. 🔄",
      "options": {
        "A": "84/100",
        "B": "42/50",
        "C": "21/25",
        "D": "10.5/12.5"
      },
      "correct_answer": "C"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "The standard form of -96/120 is: 🧮",
      "options": { "A": "-4/5", "B": "-8/10", "C": "-24/30", "D": "-48/60" },
      "correct_answer": "A"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "Convert 0.0625 to standard rational form. 🎯",
      "options": {
        "A": "625/10000",
        "B": "125/2000",
        "C": "25/400",
        "D": "1/16"
      },
      "correct_answer": "D"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "What is the standard form of 3.6? ✨",
      "options": { "A": "36/10", "B": "18/5", "C": "9/2.5", "D": "360/100" },
      "correct_answer": "B"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "Express -0.875 as a fraction in lowest terms. ❄️",
      "options": {
        "A": "-875/1000",
        "B": "-175/200",
        "C": "-35/40",
        "D": "-7/8"
      },
      "correct_answer": "D"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "The standard form of 2.5 is: 🎯",
      "options": { "A": "25/10", "B": "5/2", "C": "10/4", "D": "1.25/0.5" },
      "correct_answer": "B"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "Convert 0.16 (with bar on 6) to standard rational form. 🔄",
      "options": {
        "A": "1/6",
        "B": "5/30",
        "C": "2/12",
        "D": "10/60"
      },
      "correct_answer": "A"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "What is the standard form of -2.24? ➖",
      "options": {
        "A": "-224/100",
        "B": "-56/25",
        "C": "-14/6.25",
        "D": "-1.12/0.5"
      },
      "correct_answer": "B"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "Express 0.555... as a fraction in simplest form. 🔄",
      "options": { "A": "5/9", "B": "5.5/10", "C": "55/100", "D": "555/1000" },
      "correct_answer": "A"
    }
  ]
}