{
  "title": "Indian and International System (Numbers up to Lakhs) - Grade 4 ICSE",
  "total_questions": 100,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "In Indian system, 1,00,000 is called? 🇮🇳",
      "options": {
        "A": "Ten thousand",
        "B": "One lakh",
        "C": "One million",
        "D": "One crore"
      },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "In International system, 100,000 is called? 🌍",
      "options": {
        "A": "One lakh",
        "B": "One hundred thousand",
        "C": "One million",
        "D": "Ten thousand"
      },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "Convert to Indian: 50,000 = ? 🇮🇳",
      "options": {
        "A": "5,00,000",
        "B": "50,000",
        "C": "5,000",
        "D": "50,00,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "Convert to International: 2,50,000 = ? 🌍",
      "options": {
        "A": "250,000",
        "B": "25,000",
        "C": "2,500,000",
        "D": "2,50,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "In Indian, 10,00,000 is? 🇮🇳",
      "options": {
        "A": "Ten lakh",
        "B": "One million",
        "C": "One crore",
        "D": "Ten million"
      },
      "correct_answer": "A"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "In International, 1,000,000 is? 🌍",
      "options": {
        "A": "Ten lakh",
        "B": "One million",
        "C": "One crore",
        "D": "Ten million"
      },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Convert: 3,00,000 (Indian) = ? (International)",
      "options": {
        "A": "30,000",
        "B": "300,000",
        "C": "3,000,000",
        "D": "3,00,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "Convert: 400,000 (International) = ? (Indian)",
      "options": {
        "A": "4,00,000",
        "B": "40,000",
        "C": "4,000",
        "D": "40,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "In Indian, commas placed after? 🇮🇳",
      "options": {
        "A": "Every 3 digits only",
        "B": "First after 3 digits, then every 2 digits",
        "C": "Every 2 digits only",
        "D": "Every 4 digits"
      },
      "correct_answer": "B"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "In International, commas placed after? 🌍",
      "options": {
        "A": "Every 2 digits",
        "B": "Every 3 digits",
        "C": "Every 4 digits",
        "D": "Every digit"
      },
      "correct_answer": "B"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "5,00,000 in words (Indian)? 🇮🇳",
      "options": {
        "A": "Five thousand",
        "B": "Fifty thousand",
        "C": "Five lakh",
        "D": "Fifty lakh"
      },
      "correct_answer": "C"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "500,000 in words (International)? 🌍",
      "options": {
        "A": "Five hundred thousand",
        "B": "Fifty thousand",
        "C": "Five lakh",
        "D": "Five million"
      },
      "correct_answer": "A"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Convert: 7,50,000 (Indian) = ? (International)",
      "options": {
        "A": "75,000",
        "B": "750,000",
        "C": "7,500,000",
        "D": "7,50,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "Convert: 850,000 (International) = ? (Indian)",
      "options": {
        "A": "8,50,000",
        "B": "85,000",
        "C": "8,500",
        "D": "85,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "In Indian, 1 crore = ? lakhs 🇮🇳",
      "options": { "A": "10", "B": "100", "C": "1000", "D": "10000" },
      "correct_answer": "B"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "In International, 1 million = ? thousand 🌍",
      "options": { "A": "10", "B": "100", "C": "1000", "D": "10000" },
      "correct_answer": "C"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "Convert: 9,00,000 (Indian) = ? (International)",
      "options": {
        "A": "90,000",
        "B": "900,000",
        "C": "9,000,000",
        "D": "9,00,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "Convert: 950,000 (International) = ? (Indian)",
      "options": {
        "A": "9,50,000",
        "B": "95,000",
        "C": "9,500",
        "D": "95,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "1,25,000 in words (Indian)? 🇮🇳",
      "options": {
        "A": "One thousand twenty five",
        "B": "Twelve thousand five",
        "C": "One lakh twenty five thousand",
        "D": "Twelve lakh five thousand"
      },
      "correct_answer": "C"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "125,000 in words (International)? 🌍",
      "options": {
        "A": "One hundred twenty five thousand",
        "B": "Twelve thousand five hundred",
        "C": "One million twenty five thousand",
        "D": "Twelve lakh five thousand"
      },
      "correct_answer": "A"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "Convert: 15,75,000 (Indian) to International system 🧮",
      "options": {
        "A": "157,500",
        "B": "1,575,000",
        "C": "15,750,000",
        "D": "157,500,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "Convert: 2,350,000 (International) to Indian system 🇮🇳",
      "options": {
        "A": "23,50,000",
        "B": "2,35,000",
        "C": "23,500",
        "D": "2,35,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "In Indian, 1,00,00,000 is called? 🇮🇳",
      "options": {
        "A": "One million",
        "B": "Ten million",
        "C": "One crore",
        "D": "Ten crore"
      },
      "correct_answer": "C"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "In International, 10,000,000 is called? 🌍",
      "options": {
        "A": "One crore",
        "B": "Ten million",
        "C": "One hundred million",
        "D": "Ten crore"
      },
      "correct_answer": "B"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Convert: 25,00,000 (Indian) = ? (International)",
      "options": {
        "A": "250,000",
        "B": "2,500,000",
        "C": "25,000,000",
        "D": "250,000,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "Convert: 3,750,000 (International) = ? (Indian)",
      "options": {
        "A": "37,50,000",
        "B": "3,75,000",
        "C": "37,500",
        "D": "3,75,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Write in Indian: Three million four hundred fifty thousand 📝",
      "options": {
        "A": "34,50,000",
        "B": "3,45,000",
        "C": "3,45,00,000",
        "D": "34,500"
      },
      "correct_answer": "A"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Write in International: Forty five lakh sixty thousand 🌍",
      "options": {
        "A": "4,560,000",
        "B": "45,60,000",
        "C": "456,000",
        "D": "4,56,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "Convert: 1,25,75,000 (Indian) to International 🧮",
      "options": {
        "A": "12,575,000",
        "B": "1,257,500",
        "C": "125,750,000",
        "D": "1,257,500,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "Convert: 8,925,000 (International) to Indian 🇮🇳",
      "options": {
        "A": "89,25,000",
        "B": "8,92,500",
        "C": "89,250",
        "D": "8,92,50,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "In Indian, 10 crore = ? million 🇮🇳",
      "options": { "A": "1", "B": "10", "C": "100", "D": "1000" },
      "correct_answer": "C"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "In International, 100 million = ? crore 🌍",
      "options": { "A": "1", "B": "10", "C": "100", "D": "1000" },
      "correct_answer": "B"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "Convert: 50,00,000 (Indian) = ? (International)",
      "options": {
        "A": "500,000",
        "B": "5,000,000",
        "C": "50,000,000",
        "D": "500,000,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "Convert: 7,250,000 (International) = ? (Indian)",
      "options": {
        "A": "72,50,000",
        "B": "7,25,000",
        "C": "72,500",
        "D": "7,25,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "Write in Indian: Six million two hundred thousand 📝",
      "options": {
        "A": "62,00,000",
        "B": "6,20,000",
        "C": "6,20,00,000",
        "D": "62,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Write in International: Seventy five lakh ninety thousand 🌍",
      "options": {
        "A": "7,590,000",
        "B": "75,90,000",
        "C": "759,000",
        "D": "7,59,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "Convert: 2,00,75,000 (Indian) to International 🧮",
      "options": {
        "A": "20,075,000",
        "B": "2,007,500",
        "C": "200,750,000",
        "D": "2,007,500,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "Convert: 9,875,000 (International) to Indian 🇮🇳",
      "options": {
        "A": "98,75,000",
        "B": "9,87,500",
        "C": "98,750",
        "D": "9,87,50,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "In Indian, 1 Arab = ? crore 🇮🇳",
      "options": { "A": "10", "B": "100", "C": "1000", "D": "10000" },
      "correct_answer": "B"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "In International, 1 billion = ? million 🌍",
      "options": { "A": "10", "B": "100", "C": "1000", "D": "10000" },
      "correct_answer": "C"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "Convert: 12,34,56,789 (Indian) to International system 🧮",
      "options": {
        "A": "123,456,789",
        "B": "12,345,678.9",
        "C": "1,234,567.89",
        "D": "123,456.789"
      },
      "correct_answer": "A"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "Convert: 987,654,321 (International) to Indian system 🇮🇳",
      "options": {
        "A": "98,76,54,321",
        "B": "9,87,65,43,21",
        "C": "987,65,43,21",
        "D": "9,87,654,321"
      },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Write in words (Indian): 7,89,45,612 📝",
      "options": {
        "A": "Seven crore eighty nine lakh forty five thousand six hundred twelve",
        "B": "Seventy eight million nine hundred forty five thousand six hundred twelve",
        "C": "Seven lakh eighty nine thousand four hundred fifty six twelve",
        "D": "Seventy eight crore ninety four lakh fifty six thousand twelve"
      },
      "correct_answer": "A"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "Write in words (International): 56,789,012 🌍",
      "options": {
        "A": "Five crore sixty seven lakh eighty nine thousand twelve",
        "B": "Fifty six million seven hundred eighty nine thousand twelve",
        "C": "Five million six hundred seventy eight thousand nine hundred twelve",
        "D": "Fifty six lakh seventy eight thousand nine hundred twelve"
      },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "Convert: 1,00,00,00,000 (Indian) to International 🧮",
      "options": {
        "A": "100,000,000",
        "B": "10,000,000",
        "C": "1,000,000,000",
        "D": "100,000,000,000"
      },
      "correct_answer": "C"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "Convert: 1,000,000,000 (International) to Indian 🇮🇳",
      "options": {
        "A": "100,00,00,000",
        "B": "10,00,00,000",
        "C": "1,00,00,00,000",
        "D": "100,00,000"
      },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Which is greater? 2,34,56,789 (Indian) or 23,456,789 (International)? ⚖️",
      "options": {
        "A": "Indian number",
        "B": "International number",
        "C": "Equal",
        "D": "Cannot compare"
      },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "Add: 12,34,567 (Indian) + 345,678 (International). Answer in Indian system ➕",
      "options": {
        "A": "13,80,245",
        "B": "1,58,02,45",
        "C": "15,80,245",
        "D": "1,38,02,45"
      },
      "correct_answer": "C"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "Subtract: 9,876,543 (International) - 87,65,432 (Indian). Answer in International system ➖",
      "options": {
        "A": "1,001,111",
        "B": "1,111,111",
        "C": "10,011,110",
        "D": "1,111,001"
      },
      "correct_answer": "B"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "Multiply: 1,23,456 (Indian) × 10. Answer in both systems ✖️",
      "options": {
        "A": "12,34,560 (Indian) = 1,234,560 (International)",
        "B": "1,23,4560 (Indian) = 12,345,600 (International)",
        "C": "12,345,600 (Indian) = 1,234,560 (International)",
        "D": "1,234,560 (Indian) = 12,34,560 (International)"
      },
      "correct_answer": "A"
    },
    {
      "id": 51,
      "difficulty": "easy",
      "question": "Convert: 6,00,000 (Indian) = ? (International)",
      "options": {
        "A": "60,000",
        "B": "600,000",
        "C": "6,000,000",
        "D": "6,00,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 52,
      "difficulty": "easy",
      "question": "Convert: 700,000 (International) = ? (Indian)",
      "options": {
        "A": "7,00,000",
        "B": "70,000",
        "C": "7,000",
        "D": "70,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 53,
      "difficulty": "easy",
      "question": "In Indian, 2,00,000 is called? 🇮🇳",
      "options": {
        "A": "Two thousand",
        "B": "Twenty thousand",
        "C": "Two lakh",
        "D": "Twenty lakh"
      },
      "correct_answer": "C"
    },
    {
      "id": 54,
      "difficulty": "easy",
      "question": "In International, 200,000 is called? 🌍",
      "options": {
        "A": "Two hundred thousand",
        "B": "Twenty thousand",
        "C": "Two lakh",
        "D": "Two million"
      },
      "correct_answer": "A"
    },
    {
      "id": 55,
      "difficulty": "easy",
      "question": "Convert: 8,00,000 (Indian) = ? (International)",
      "options": {
        "A": "80,000",
        "B": "800,000",
        "C": "8,000,000",
        "D": "8,00,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 56,
      "difficulty": "easy",
      "question": "Convert: 900,000 (International) = ? (Indian)",
      "options": {
        "A": "9,00,000",
        "B": "90,000",
        "C": "9,000",
        "D": "90,00,000"
      },
      "correct_answer": "A"
    },
    {
      "id": 57,
      "difficulty": "easy",
      "question": "1,50,000 in words (Indian)? 🇮🇳",
      "options": {
        "A": "One thousand fifty",
        "B": "Fifteen thousand",
        "C": "One lakh fifty thousand",
        "D": "Fifteen lakh"
      },
      "correct_answer": "C"
    },
    {
      "id": 58,
      "difficulty": "easy",
      "question": "150,000 in words (International)? 🌍",
      "options": {
        "A": "One hundred fifty thousand",
        "B": "Fifteen thousand",
        "C": "One lakh fifty thousand",
        "D": "One million fifty thousand"
      },
      "correct_answer": "A"
    },
    {
      "id": 59,
      "difficulty": "easy",
      "question": "Convert: 4,50,000 (Indian) = ? (International)",
      "options": {
        "A": "45,000",
        "B": "450,000",
        "C": "4,500,000",
        "D": "4,50,000"
      },
      "correct_answer": "B"
    },
    {
      "id": 60,
      "difficulty": "easy",
      "question": "Convert: 550,000 (International) = ? (Indian)",
      "options": {
        "A": "5,50,000",
        "B": "55,000",
        "C": "5,500",
        "D": "55,00,000"
      },
      "correct_answer": "A"
    }
  ]
}