{
  "title": "Rules of Addition and Subtraction (Roman Numerals) - Grade 4",
  "total_questions": 60,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "What is I + I? ✨", "options": {"A": "II", "B": "III", "C": "IV", "D": "V"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "What is V – I? 🔢", "options": {"A": "III", "B": "IV", "C": "II", "D": "I"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Add: II + I 😊", "options": {"A": "III", "B": "IV", "C": "V", "D": "II"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "Subtract: X – V 🧮", "options": {"A": "III", "B": "VI", "C": "V", "D": "IV"}, "correct_answer": "D"},
    {"id": 5, "difficulty": "easy", "question": "What is I + III? ⭐", "options": {"A": "IV", "B": "V", "C": "III", "D": "II"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "What is X – I? 🏛️", "options": {"A": "VIII", "B": "IX", "C": "VII", "D": "VI"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "Find: V + V 🎯", "options": {"A": "IX", "B": "X", "C": "XI", "D": "VIII"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "What is VII – III? ➖", "options": {"A": "III", "B": "IV", "C": "II", "D": "V"}, "correct_answer": "D"},
    {"id": 9, "difficulty": "easy", "question": "Add: III + IV 😊", "options": {"A": "VII", "B": "VIII", "C": "VI", "D": "V"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "What is IX – I? 🔢", "options": {"A": "VII", "B": "X", "C": "VIII", "D": "IX"}, "correct_answer": "B"},

    {"id": 11, "difficulty": "easy", "question": "Add: X + I ✨", "options": {"A": "XI", "B": "XII", "C": "IX", "D": "X"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "What is VI – II? 🔽", "options": {"A": "IV", "B": "V", "C": "III", "D": "II"}, "correct_answer": "D"},
    {"id": 13, "difficulty": "easy", "question": "What is V + II? ⭐", "options": {"A": "VIII", "B": "VII", "C": "IX", "D": "VI"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "Subtract: XI – I 🏛️", "options": {"A": "VIII", "B": "IX", "C": "X", "D": "VII"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Add: I + V 😊", "options": {"A": "VI", "B": "VII", "C": "VIII", "D": "IX"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "What is X – IV? 🧮", "options": {"A": "VI", "B": "VII", "C": "V", "D": "IV"}, "correct_answer": "D"},
    {"id": 17, "difficulty": "easy", "question": "Add: IX + I 🎯", "options": {"A": "XI", "B": "X", "C": "XII", "D": "IX"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Subtract: VIII – II ➖", "options": {"A": "IV", "B": "V", "C": "VI", "D": "VII"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "What is III + III? 😄", "options": {"A": "V", "B": "VI", "C": "VII", "D": "IV"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "What is XII – II? ✏️", "options": {"A": "VIII", "B": "IX", "C": "X", "D": "XI"}, "correct_answer": "D"},

    {"id": 21, "difficulty": "medium", "question": "Add: XIV + I 🏛️", "options": {"A": "XIII", "B": "XV", "C": "XVI", "D": "XIV"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Subtract: XX – V ✨", "options": {"A": "XIV", "B": "XV", "C": "XVI", "D": "XVII"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "Add: IX + VI 🎯", "options": {"A": "XVI", "B": "XV", "C": "XIV", "D": "XVII"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "What is XV – V? ➖", "options": {"A": "VII", "B": "VIII", "C": "X", "D": "XI"}, "correct_answer": "D"},
    {"id": 25, "difficulty": "medium", "question": "Add: XX + II 😊", "options": {"A": "XXI", "B": "XXII", "C": "XXIII", "D": "XX"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "What is XL – X? 🧮", "options": {"A": "XXVIII", "B": "XX", "C": "XXX", "D": "XXV"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Add: XIII + VII ⭐", "options": {"A": "XXII", "B": "XX", "C": "XXI", "D": "XIX"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "What is XXV – V? 🎯", "options": {"A": "XX", "B": "XVIII", "C": "XIX", "D": "XXII"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "Add: XX + X ✨", "options": {"A": "XXVIII", "B": "XXX", "C": "XXXI", "D": "XXV"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "Subtract: XL – V 🧮", "options": {"A": "XXXVI", "B": "XXXVII", "C": "XXXV", "D": "XXX"}, "correct_answer": "B"},

    {"id": 31, "difficulty": "medium", "question": "Add: XV + XV 🎉", "options": {"A": "XXV", "B": "XXX", "C": "XXXII", "D": "XX"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "What is L – X? 🏛️", "options": {"A": "XL", "B": "XXX", "C": "XX", "D": "XLV"}, "correct_answer": "D"},
    {"id": 33, "difficulty": "medium", "question": "Add: XIX + I ✨", "options": {"A": "XXI", "B": "XX", "C": "XVII", "D": "XXII"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "Subtract: L – V ➖", "options": {"A": "XLV", "B": "XL", "C": "XXXV", "D": "XXV"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Add XX + XV ⭐", "options": {"A": "XXX", "B": "XXXV", "C": "XL", "D": "XLV"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "What is LX – X? 🧮", "options": {"A": "XXXX", "B": "XL", "C": "L", "D": "XXX"}, "correct_answer": "D"},
    {"id": 37, "difficulty": "medium", "question": "Add: XX + XX ✏️", "options": {"A": "XL", "B": "XXX", "C": "XXXV", "D": "L"}, "correct_answer": "A"},
    {"id": 38, "difficulty": "medium", "question": "Add: XXX + X 😊", "options": {"A": "XL", "B": "L", "C": "XLI", "D": "XXXV"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "What is LX – V? 🎯", "options": {"A": "LV", "B": "XLV", "C": "L", "D": "LIV"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "Add: L + X 🧮", "options": {"A": "LX", "B": "LXI", "C": "LV", "D": "XL"}, "correct_answer": "D"},

    {"id": 41, "difficulty": "hard", "question": "Add: XL + XL 🏛️", "options": {"A": "LXX", "B": "LXXX", "C": "XC", "D": "C"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "Subtract: C – X 🔢", "options": {"A": "LXXX", "B": "LXXXV", "C": "XC", "D": "LXXXVIII"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "Add: LX + XL ⭐", "options": {"A": "XC", "B": "C", "C": "LXXX", "D": "LXX"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "What is XC – X? ➖", "options": {"A": "LXXX", "B": "LXX", "C": "LX", "D": "LXXXV"}, "correct_answer": "D"},
    {"id": 45, "difficulty": "hard", "question": "Add: L + L 🎉", "options": {"A": "C", "B": "XC", "C": "LXXX", "D": "LXX"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "Subtract: C – XL 🏛️", "options": {"A": "L", "B": "LX", "C": "LXXX", "D": "LXX"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "Add: XC + X 😊", "options": {"A": "C", "B": "CX", "C": "XCX", "D": "LXXX"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "What is LXX – X? ✏️", "options": {"A": "LX", "B": "LXXV", "C": "LXXX", "D": "L"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "hard", "question": "Add: LXX + XXX 🤓", "options": {"A": "XC", "B": "C", "C": "LXXX", "D": "CX"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "Subtract: C – L 🧮", "options": {"A": "XL", "B": "XXX", "C": "L", "D": "LXV"}, "correct_answer": "B"},

    {"id": 51, "difficulty": "hard", "question": "Add: XC + XC 🎯", "options": {"A": "CLXXX", "B": "CXC", "C": "CC", "D": "CL"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "What is C – XX? 📏", "options": {"A": "LXXX", "B": "LXX", "C": "LX", "D": "LXXV"}, "correct_answer": "D"},
    {"id": 53, "difficulty": "hard", "question": "Add: LXXX + XX ✨", "options": {"A": "C", "B": "XC", "C": "CX", "D": "XCX"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "Subtract: CC – C 🏛️", "options": {"A": "L", "B": "C", "C": "CL", "D": "XC"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "Add: L + C 🎉", "options": {"A": "CL", "B": "XC", "C": "CXX", "D": "CX"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "What is CX – X? 🤓", "options": {"A": "C", "B": "XC", "C": "LXXX", "D": "LX"}, "correct_answer": "D"},
    {"id": 57, "difficulty": "hard", "question": "Add: C + C 😊", "options": {"A": "CC", "B": "CCC", "C": "CL", "D": "CXC"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "What is CL – L? 🧮", "options": {"A": "C", "B": "XC", "C": "LXXX", "D": "CXX"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Add: LXXX + LXXX 💡", "options": {"A": "CLX", "B": "CL", "C": "CLXXX", "D": "CXL"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "Subtract: C – XXX 🎯", "options": {"A": "LX", "B": "L", "C": "LXXX", "D": "LXX"}, "correct_answer": "D"}
  ]
}