{
  "title": "Simple Problems (Unitary Method) - Grade 4 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "If 2 apples cost ₹20, what is the cost of 1 apple? 🍎",
      "options": { "A": "₹8", "B": "₹10", "C": "₹12", "D": "₹15" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "A bike travels 40 km in 2 hours. What is its speed per hour? 🚲",
      "options": {
        "A": "15 km/h",
        "B": "20 km/h",
        "C": "25 km/h",
        "D": "30 km/h"
      },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "If 5 oranges cost ₹75, what is the cost of 1 orange? 🍊",
      "options": { "A": "₹12", "B": "₹13", "C": "₹14", "D": "₹15" },
      "correct_answer": "D"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "A box contains 24 chocolates. How many chocolates in 3 such boxes? 🍫",
      "options": { "A": "60", "B": "64", "C": "72", "D": "80" },
      "correct_answer": "C"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "If 1 dozen bananas costs ₹36, what is the cost of 1 banana? 🍌",
      "options": { "A": "₹2", "B": "₹2.5", "C": "₹3", "D": "₹3.5" },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "A man earns ₹400 in 5 days. How much does he earn in 1 day? 👨‍💼",
      "options": { "A": "₹60", "B": "₹70", "C": "₹80", "D": "₹90" },
      "correct_answer": "C"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "If 8 pencils cost ₹40, what is the cost of 1 pencil? ✏️",
      "options": { "A": "₹4", "B": "₹5", "C": "₹6", "D": "₹7" },
      "correct_answer": "B"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "A car travels 180 km in 3 hours. How far in 1 hour? 🚗",
      "options": { "A": "50 km", "B": "55 km", "C": "60 km", "D": "65 km" },
      "correct_answer": "C"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "If 3 kg of sugar costs ₹150, what is the cost of 1 kg? 🍬",
      "options": { "A": "₹40", "B": "₹45", "C": "₹50", "D": "₹55" },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "A pack of 10 pens costs ₹80. What is the cost of 1 pen? 🖊️",
      "options": { "A": "₹6", "B": "₹7", "C": "₹8", "D": "₹9" },
      "correct_answer": "C"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "If 4 ice creams cost ₹100, what is the cost of 1 ice cream? 🍦",
      "options": { "A": "₹20", "B": "₹22", "C": "₹24", "D": "₹25" },
      "correct_answer": "D"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "A bus carries 45 passengers in 1 trip. How many in 4 trips? 🚌",
      "options": { "A": "160", "B": "170", "C": "180", "D": "190" },
      "correct_answer": "C"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "If 2 books cost ₹120, what is the cost of 1 book? 📘",
      "options": { "A": "₹50", "B": "₹55", "C": "₹60", "D": "₹65" },
      "correct_answer": "C"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "A machine makes 50 toys in 2 hours. How many in 1 hour? 🤖",
      "options": { "A": "20", "B": "22", "C": "24", "D": "25" },
      "correct_answer": "D"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "If 6 chocolates cost ₹90, what is the cost of 1 chocolate? 🍫",
      "options": { "A": "₹12", "B": "₹13", "C": "₹14", "D": "₹15" },
      "correct_answer": "D"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "A man walks 12 km in 4 hours. How far in 1 hour? 🚶",
      "options": { "A": "2 km", "B": "2.5 km", "C": "3 km", "D": "3.5 km" },
      "correct_answer": "C"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "If 5 packets of chips cost ₹125, what is the cost of 1 packet? 🥔",
      "options": { "A": "₹20", "B": "₹22", "C": "₹24", "D": "₹25" },
      "correct_answer": "D"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "A tap fills 20 litres in 5 minutes. How much in 1 minute? 🚰",
      "options": {
        "A": "3 litres",
        "B": "4 litres",
        "C": "5 litres",
        "D": "6 litres"
      },
      "correct_answer": "B"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "If 10 balloons cost ₹50, what is the cost of 1 balloon? 🎈",
      "options": { "A": "₹4", "B": "₹5", "C": "₹6", "D": "₹7" },
      "correct_answer": "B"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "A factory produces 100 shirts in 5 days. How many in 1 day? 👕",
      "options": { "A": "15", "B": "18", "C": "20", "D": "22" },
      "correct_answer": "C"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "If 9 pens cost ₹135, how much will 7 pens cost? 🖊️",
      "options": { "A": "₹95", "B": "₹100", "C": "₹105", "D": "₹110" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "A car travels 280 km in 7 hours. How long will it take to travel 360 km at same speed? 🚗",
      "options": {
        "A": "8 hours",
        "B": "9 hours",
        "C": "10 hours",
        "D": "11 hours"
      },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "If 15 metres of cloth cost ₹450, what is the cost of 8 metres? 👗",
      "options": { "A": "₹220", "B": "₹230", "C": "₹240", "D": "₹250" },
      "correct_answer": "C"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "A worker earns ₹630 in 6 days. How much will he earn in 10 days? 👷",
      "options": { "A": "₹950", "B": "₹1000", "C": "₹1050", "D": "₹1100" },
      "correct_answer": "C"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "If 12 kg of rice costs ₹600, how much rice can be bought for ₹350? 🍚",
      "options": { "A": "6 kg", "B": "6.5 kg", "C": "7 kg", "D": "7.5 kg" },
      "correct_answer": "C"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "A train covers 360 km in 6 hours. How far will it go in 9 hours? 🚂",
      "options": { "A": "500 km", "B": "520 km", "C": "540 km", "D": "560 km" },
      "correct_answer": "C"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "If 5 chairs cost ₹2500, what is the cost of 8 chairs? 🪑",
      "options": { "A": "₹3800", "B": "₹3900", "C": "₹4000", "D": "₹4100" },
      "correct_answer": "C"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "A family consumes 18 kg of wheat in 30 days. How much will they consume in 45 days? 🌾",
      "options": { "A": "25 kg", "B": "26 kg", "C": "27 kg", "D": "28 kg" },
      "correct_answer": "C"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "If 8 bottles of juice cost ₹320, what is the cost of 11 bottles? 🧃",
      "options": { "A": "₹420", "B": "₹430", "C": "₹440", "D": "₹450" },
      "correct_answer": "C"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "A machine prints 480 pages in 8 hours. How many pages in 11 hours? 🖨️",
      "options": { "A": "620", "B": "640", "C": "660", "D": "680" },
      "correct_answer": "C"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "If 20 eggs cost ₹100, what is the cost of 35 eggs? 🥚",
      "options": { "A": "₹165", "B": "₹170", "C": "₹175", "D": "₹180" },
      "correct_answer": "C"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "A man runs 24 km in 3 hours. How long will he take to run 40 km? 🏃",
      "options": {
        "A": "4 hours",
        "B": "4.5 hours",
        "C": "5 hours",
        "D": "5.5 hours"
      },
      "correct_answer": "C"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "If 6 notebooks cost ₹180, what is the cost of 15 notebooks? 📓",
      "options": { "A": "₹420", "B": "₹430", "C": "₹440", "D": "₹450" },
      "correct_answer": "D"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "A bus consumes 30 litres of diesel for 150 km. How much for 250 km? 🚌",
      "options": {
        "A": "45 litres",
        "B": "48 litres",
        "C": "50 litres",
        "D": "52 litres"
      },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "If 9 boxes weigh 72 kg, how much do 13 boxes weigh? 📦",
      "options": { "A": "100 kg", "B": "102 kg", "C": "104 kg", "D": "106 kg" },
      "correct_answer": "C"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "A typist types 540 words in 9 minutes. How many words in 14 minutes? ⌨️",
      "options": { "A": "800", "B": "820", "C": "840", "D": "860" },
      "correct_answer": "C"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "If 7 shirts cost ₹1400, how many shirts can be bought for ₹2600? 👔",
      "options": { "A": "11", "B": "12", "C": "13", "D": "14" },
      "correct_answer": "C"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "A pipe fills a tank in 12 hours. How much of the tank is filled in 3 hours? 🚰",
      "options": { "A": "1/3", "B": "1/4", "C": "1/5", "D": "1/6" },
      "correct_answer": "B"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "If 10 kg of apples cost ₹800, what is the cost of 7 kg? 🍎",
      "options": { "A": "₹520", "B": "₹540", "C": "₹560", "D": "₹580" },
      "correct_answer": "C"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "A cyclist covers 48 km in 4 hours. How far in 7 hours? 🚴",
      "options": { "A": "78 km", "B": "80 km", "C": "82 km", "D": "84 km" },
      "correct_answer": "D"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "If 5 workers can build a wall in 12 days, how many days will 10 workers take? (Inverse proportion) 🧱",
      "options": { "A": "5 days", "B": "6 days", "C": "7 days", "D": "8 days" },
      "correct_answer": "B"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "A garrison has food for 300 soldiers for 20 days. How long will it last for 200 soldiers? 🍲",
      "options": {
        "A": "25 days",
        "B": "28 days",
        "C": "30 days",
        "D": "32 days"
      },
      "correct_answer": "C"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "If 18 pumps can empty a tank in 5 hours, how long will 30 pumps take? (Inverse) ⛽",
      "options": {
        "A": "2 hours",
        "B": "2.5 hours",
        "C": "3 hours",
        "D": "3.5 hours"
      },
      "correct_answer": "C"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "A car travels 300 km in 5 hours. How long will it take to travel 420 km? 🚗",
      "options": {
        "A": "6 hours",
        "B": "6.5 hours",
        "C": "7 hours",
        "D": "7.5 hours"
      },
      "correct_answer": "C"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "If 15 metres of wire cost ₹180, how much wire can be bought for ₹300? 🔌",
      "options": { "A": "22 m", "B": "23 m", "C": "24 m", "D": "25 m" },
      "correct_answer": "D"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "A machine produces 600 items in 8 hours. How many items in 15 hours? 🏭",
      "options": { "A": "1100", "B": "1125", "C": "1150", "D": "1175" },
      "correct_answer": "B"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "If 8 kg of tea costs ₹1200, what is the cost of 14 kg? 🍵",
      "options": { "A": "₹2000", "B": "₹2050", "C": "₹2100", "D": "₹2150" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "A train covers 560 km in 8 hours. How far will it go in 13 hours? 🚂",
      "options": { "A": "880 km", "B": "900 km", "C": "910 km", "D": "920 km" },
      "correct_answer": "C"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "If 12 men can do a job in 20 days, how many days will 16 men take? 👷",
      "options": { "A": "12", "B": "13", "C": "14", "D": "15" },
      "correct_answer": "D"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "A family uses 24 litres of milk in 12 days. How much milk in 30 days? 🥛",
      "options": {
        "A": "50 litres",
        "B": "55 litres",
        "C": "60 litres",
        "D": "65 litres"
      },
      "correct_answer": "C"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "If 5 pipes fill a tank in 6 hours, how long will 3 pipes take? 🚰",
      "options": {
        "A": "8 hours",
        "B": "9 hours",
        "C": "10 hours",
        "D": "11 hours"
      },
      "correct_answer": "C"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "A student scores 360 marks in 6 subjects. What is his average per subject? 📝",
      "options": { "A": "50", "B": "55", "C": "60", "D": "65" },
      "correct_answer": "C"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "If 9 cars carry 270 people, how many people can 14 cars carry? 🚗",
      "options": { "A": "400", "B": "410", "C": "420", "D": "430" },
      "correct_answer": "C"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "A printer prints 1500 pages in 10 hours. How many pages in 16 hours? 🖨️",
      "options": { "A": "2200", "B": "2300", "C": "2400", "D": "2500" },
      "correct_answer": "C"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "If 4 machines produce 800 items in 10 days, how many items will 7 machines produce in 15 days? 🏭",
      "options": { "A": "2000", "B": "2100", "C": "2200", "D": "2300" },
      "correct_answer": "B"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "A man earns ₹7500 in 15 days. How much will he earn in 28 days? 💰",
      "options": { "A": "₹13000", "B": "₹13500", "C": "₹14000", "D": "₹14500" },
      "correct_answer": "C"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "If 20 metres of rope cost ₹500, what is the cost of 32 metres? 🧵",
      "options": { "A": "₹780", "B": "₹790", "C": "₹800", "D": "₹810" },
      "correct_answer": "C"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "A bus travels 450 km in 9 hours. How long to travel 600 km? 🚌",
      "options": {
        "A": "11 hours",
        "B": "12 hours",
        "C": "13 hours",
        "D": "14 hours"
      },
      "correct_answer": "B"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "If 6 kg of ghee costs ₹1200, how much ghee can be bought for ₹3000? 🧈",
      "options": { "A": "13 kg", "B": "14 kg", "C": "15 kg", "D": "16 kg" },
      "correct_answer": "C"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "A factory produces 1080 toys in 12 days. How many toys in 20 days? 🤖",
      "options": { "A": "1700", "B": "1750", "C": "1800", "D": "1850" },
      "correct_answer": "C"
    }
  ]
}