{
  "title": "Measuring Lengths (Measurement - cm, m) - Grade 2 CBSE",
  "total_questions": 100,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "How many centimeters in 1 meter?", "options": {"A": "10 cm", "B": "50 cm", "C": "100 cm", "D": "1000 cm"}, "correct_answer": "C"},
    {"id": 2, "difficulty": "easy", "question": "A pencil is about ___ cm long", "options": {"A": "5 cm", "B": "15 cm", "C": "50 cm", "D": "100 cm"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "1 meter = ___ centimeters", "options": {"A": "10", "B": "100", "C": "1000", "D": "50"}, "correct_answer": "B"},
    {"id": 4, "difficulty": "easy", "question": "Your desk is about ___ cm high", "options": {"A": "20 cm", "B": "75 cm", "C": "150 cm", "D": "300 cm"}, "correct_answer": "B"},
    {"id": 5, "difficulty": "easy", "question": "How many meters in 200 cm?", "options": {"A": "0.2 m", "B": "2 m", "C": "20 m", "D": "200 m"}, "correct_answer": "B"},
    {"id": 6, "difficulty": "easy", "question": "A door is about ___ m tall", "options": {"A": "0.5 m", "B": "1 m", "C": "2 m", "D": "5 m"}, "correct_answer": "C"},
    {"id": 7, "difficulty": "easy", "question": "50 cm = ___ m", "options": {"A": "0.5 m", "B": "5 m", "C": "50 m", "D": "500 m"}, "correct_answer": "A"},
    {"id": 8, "difficulty": "easy", "question": "Your math book is about ___ cm long", "options": {"A": "10 cm", "B": "25 cm", "C": "50 cm", "D": "100 cm"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "3 meters = ___ cm", "options": {"A": "30 cm", "B": "300 cm", "C": "3000 cm", "D": "3 cm"}, "correct_answer": "B"},
    {"id": 10, "difficulty": "easy", "question": "A basketball hoop is about ___ m high", "options": {"A": "1 m", "B": "3 m", "C": "10 m", "D": "30 m"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "150 cm = ___ m", "options": {"A": "0.15 m", "B": "1.5 m", "C": "15 m", "D": "150 m"}, "correct_answer": "B"},
    {"id": 12, "difficulty": "easy", "question": "Your foot is about ___ cm long", "options": {"A": "5 cm", "B": "15 cm", "C": "30 cm", "D": "50 cm"}, "correct_answer": "B"},
    {"id": 13, "difficulty": "easy", "question": "2.5 m = ___ cm", "options": {"A": "25 cm", "B": "250 cm", "C": "2500 cm", "D": "2.5 cm"}, "correct_answer": "B"},
    {"id": 14, "difficulty": "easy", "question": "A car is about ___ m long", "options": {"A": "0.5 m", "B": "2 m", "C": "4 m", "D": "10 m"}, "correct_answer": "C"},
    {"id": 15, "difficulty": "easy", "question": "75 cm = ___ m", "options": {"A": "0.075 m", "B": "0.75 m", "C": "7.5 m", "D": "75 m"}, "correct_answer": "B"},
    {"id": 16, "difficulty": "easy", "question": "Your arm is about ___ cm long", "options": {"A": "10 cm", "B": "50 cm", "C": "100 cm", "D": "150 cm"}, "correct_answer": "B"},
    {"id": 17, "difficulty": "easy", "question": "4 m = ___ cm", "options": {"A": "40 cm", "B": "400 cm", "C": "4000 cm", "D": "4 cm"}, "correct_answer": "B"},
    {"id": 18, "difficulty": "easy", "question": "A bicycle is about ___ m long", "options": {"A": "0.5 m", "B": "1.5 m", "C": "3 m", "D": "6 m"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "125 cm = ___ m", "options": {"A": "0.125 m", "B": "1.25 m", "C": "12.5 m", "D": "125 m"}, "correct_answer": "B"},
    {"id": 20, "difficulty": "easy", "question": "Your height is about ___ cm", "options": {"A": "50 cm", "B": "100 cm", "C": "120 cm", "D": "200 cm"}, "correct_answer": "C"},

    {"id": 21, "difficulty": "medium", "question": "If a ribbon is 2 m 50 cm long, its length in cm is:", "options": {"A": "25 cm", "B": "250 cm", "C": "2050 cm", "D": "2500 cm"}, "correct_answer": "B"},
    {"id": 22, "difficulty": "medium", "question": "A table is 1.2 m long. How many cm is that?", "options": {"A": "12 cm", "B": "120 cm", "C": "1200 cm", "D": "1.2 cm"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "Convert 3 m 75 cm to centimeters", "options": {"A": "37.5 cm", "B": "375 cm", "C": "3075 cm", "D": "3750 cm"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "A rope is 450 cm long. How many meters is that?", "options": {"A": "0.45 m", "B": "4.5 m", "C": "45 m", "D": "450 m"}, "correct_answer": "B"},
    {"id": 25, "difficulty": "medium", "question": "Convert 2.8 m to cm", "options": {"A": "28 cm", "B": "280 cm", "C": "2800 cm", "D": "2.8 cm"}, "correct_answer": "B"},
    {"id": 26, "difficulty": "medium", "question": "A bookshelf is 180 cm tall. How many meters?", "options": {"A": "0.18 m", "B": "1.8 m", "C": "18 m", "D": "180 m"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Convert 5 m 25 cm to cm", "options": {"A": "52.5 cm", "B": "525 cm", "C": "5025 cm", "D": "5250 cm"}, "correct_answer": "B"},
    {"id": 28, "difficulty": "medium", "question": "A window is 1.5 m wide. How many cm?", "options": {"A": "15 cm", "B": "150 cm", "C": "1500 cm", "D": "1.5 cm"}, "correct_answer": "B"},
    {"id": 29, "difficulty": "medium", "question": "Convert 625 cm to meters", "options": {"A": "0.625 m", "B": "6.25 m", "C": "62.5 m", "D": "625 m"}, "correct_answer": "B"},
    {"id": 30, "difficulty": "medium", "question": "A garden is 8.3 m long. How many cm?", "options": {"A": "83 cm", "B": "830 cm", "C": "8300 cm", "D": "8.3 cm"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "Convert 4 m 90 cm to cm", "options": {"A": "49 cm", "B": "490 cm", "C": "4090 cm", "D": "4900 cm"}, "correct_answer": "B"},
    {"id": 32, "difficulty": "medium", "question": "A swimming pool is 25 m long. How many cm?", "options": {"A": "250 cm", "B": "2500 cm", "C": "25000 cm", "D": "25 cm"}, "correct_answer": "B"},
    {"id": 33, "difficulty": "medium", "question": "Convert 750 cm to meters", "options": {"A": "0.75 m", "B": "7.5 m", "C": "75 m", "D": "750 m"}, "correct_answer": "B"},
    {"id": 34, "difficulty": "medium", "question": "A bridge is 120 m long. How many cm?", "options": {"A": "1200 cm", "B": "12000 cm", "C": "120000 cm", "D": "120 cm"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Convert 6 m 15 cm to cm", "options": {"A": "61.5 cm", "B": "615 cm", "C": "6015 cm", "D": "6150 cm"}, "correct_answer": "B"},
    {"id": 36, "difficulty": "medium", "question": "A football field is 100 m long. How many cm?", "options": {"A": "1000 cm", "B": "10000 cm", "C": "100000 cm", "D": "100 cm"}, "correct_answer": "B"},
    {"id": 37, "difficulty": "medium", "question": "Convert 825 cm to meters", "options": {"A": "0.825 m", "B": "8.25 m", "C": "82.5 m", "D": "825 m"}, "correct_answer": "B"},
    {"id": 38, "difficulty": "medium", "question": "A runway is 3.5 km long. How many meters?", "options": {"A": "35 m", "B": "350 m", "C": "3500 m", "D": "35000 m"}, "correct_answer": "C"},
    {"id": 39, "difficulty": "medium", "question": "Convert 9 m 45 cm to cm", "options": {"A": "94.5 cm", "B": "945 cm", "C": "9045 cm", "D": "9450 cm"}, "correct_answer": "B"},
    {"id": 40, "difficulty": "medium", "question": "A tower is 300 m tall. How many cm?", "options": {"A": "3000 cm", "B": "30000 cm", "C": "300000 cm", "D": "300 cm"}, "correct_answer": "B"},
    {"id": 41, "difficulty": "medium", "question": "Convert 1125 cm to meters", "options": {"A": "1.125 m", "B": "11.25 m", "C": "112.5 m", "D": "1125 m"}, "correct_answer": "B"},
    {"id": 42, "difficulty": "medium", "question": "A river is 2.8 km long. How many meters?", "options": {"A": "28 m", "B": "280 m", "C": "2800 m", "D": "28000 m"}, "correct_answer": "C"},
    {"id": 43, "difficulty": "medium", "question": "Convert 7 m 80 cm to cm", "options": {"A": "78 cm", "B": "780 cm", "C": "7080 cm", "D": "7800 cm"}, "correct_answer": "B"},
    {"id": 44, "difficulty": "medium", "question": "A mountain is 4 km high. How many meters?", "options": {"A": "40 m", "B": "400 m", "C": "4000 m", "D": "40000 m"}, "correct_answer": "C"},
    {"id": 45, "difficulty": "medium", "question": "Convert 1500 cm to meters", "options": {"A": "0.15 m", "B": "1.5 m", "C": "15 m", "D": "150 m"}, "correct_answer": "C"},
    {"id": 46, "difficulty": "medium", "question": "A highway is 50 km long. How many meters?", "options": {"A": "500 m", "B": "5000 m", "C": "50000 m", "D": "500000 m"}, "correct_answer": "C"},
    {"id": 47, "difficulty": "medium", "question": "Convert 3 m 99 cm to cm", "options": {"A": "39.9 cm", "B": "399 cm", "C": "3099 cm", "D": "3990 cm"}, "correct_answer": "B"},
    {"id": 48, "difficulty": "medium", "question": "A ship is 250 m long. How many cm?", "options": {"A": "2500 cm", "B": "25000 cm", "C": "250000 cm", "D": "250 cm"}, "correct_answer": "B"},
    {"id": 49, "difficulty": "medium", "question": "Convert 1875 cm to meters", "options": {"A": "1.875 m", "B": "18.75 m", "C": "187.5 m", "D": "1875 m"}, "correct_answer": "B"},
    {"id": 50, "difficulty": "medium", "question": "A train is 0.5 km long. How many meters?", "options": {"A": "5 m", "B": "50 m", "C": "500 m", "D": "5000 m"}, "correct_answer": "C"},
    {"id": 51, "difficulty": "medium", "question": "Convert 8 m 20 cm to cm", "options": {"A": "82 cm", "B": "820 cm", "C": "8020 cm", "D": "8200 cm"}, "correct_answer": "B"},
    {"id": 52, "difficulty": "medium", "question": "A plane flies at 10 km height. How many meters?", "options": {"A": "100 m", "B": "1000 m", "C": "10000 m", "D": "100000 m"}, "correct_answer": "C"},
    {"id": 53, "difficulty": "medium", "question": "Convert 2250 cm to meters", "options": {"A": "2.25 m", "B": "22.5 m", "C": "225 m", "D": "2250 m"}, "correct_answer": "B"},
    {"id": 54, "difficulty": "medium", "question": "A submarine dives to 0.2 km depth. How many meters?", "options": {"A": "2 m", "B": "20 m", "C": "200 m", "D": "2000 m"}, "correct_answer": "C"},
    {"id": 55, "difficulty": "medium", "question": "Convert 5 m 50 cm to cm", "options": {"A": "55 cm", "B": "550 cm", "C": "5050 cm", "D": "5500 cm"}, "correct_answer": "B"},
    {"id": 56, "difficulty": "medium", "question": "A cable is 1.5 km long. How many meters?", "options": {"A": "15 m", "B": "150 m", "C": "1500 m", "D": "15000 m"}, "correct_answer": "C"},
    {"id": 57, "difficulty": "medium", "question": "Convert 2625 cm to meters", "options": {"A": "2.625 m", "B": "26.25 m", "C": "262.5 m", "D": "2625 m"}, "correct_answer": "B"},
    {"id": 58, "difficulty": "medium", "question": "A tunnel is 3.2 km long. How many meters?", "options": {"A": "32 m", "B": "320 m", "C": "3200 m", "D": "32000 m"}, "correct_answer": "C"},
    {"id": 59, "difficulty": "medium", "question": "Convert 6 m 75 cm to cm", "options": {"A": "67.5 cm", "B": "675 cm", "C": "6075 cm", "D": "6750 cm"}, "correct_answer": "B"},
    {"id": 60, "difficulty": "medium", "question": "A pipeline is 12 km long. How many meters?", "options": {"A": "120 m", "B": "1200 m", "C": "12000 m", "D": "120000 m"}, "correct_answer": "C"},
    {"id": 61, "difficulty": "medium", "question": "Convert 3000 cm to meters", "options": {"A": "0.3 m", "B": "3 m", "C": "30 m", "D": "300 m"}, "correct_answer": "C"},
    {"id": 62, "difficulty": "medium", "question": "A racetrack is 5.5 km long. How many meters?", "options": {"A": "55 m", "B": "550 m", "C": "5500 m", "D": "55000 m"}, "correct_answer": "C"},
    {"id": 63, "difficulty": "medium", "question": "Convert 4 m 30 cm to cm", "options": {"A": "43 cm", "B": "430 cm", "C": "4030 cm", "D": "4300 cm"}, "correct_answer": "B"},
    {"id": 64, "difficulty": "medium", "question": "A dam is 0.8 km wide. How many meters?", "options": {"A": "8 m", "B": "80 m", "C": "800 m", "D": "8000 m"}, "correct_answer": "C"},
    {"id": 65, "difficulty": "medium", "question": "Convert 3375 cm to meters", "options": {"A": "3.375 m", "B": "33.75 m", "C": "337.5 m", "D": "3375 m"}, "correct_answer": "B"},
    {"id": 66, "difficulty": "medium", "question": "A canal is 25 km long. How many meters?", "options": {"A": "250 m", "B": "2500 m", "C": "25000 m", "D": "250000 m"}, "correct_answer": "C"},
    {"id": 67, "difficulty": "medium", "question": "Convert 9 m 10 cm to cm", "options": {"A": "91 cm", "B": "910 cm", "C": "9010 cm", "D": "9100 cm"}, "correct_answer": "B"},
    {"id": 68, "difficulty": "medium", "question": "A fence is 0.75 km long. How many meters?", "options": {"A": "7.5 m", "B": "75 m", "C": "750 m", "D": "7500 m"}, "correct_answer": "C"},
    {"id": 69, "difficulty": "medium", "question": "Convert 3750 cm to meters", "options": {"A": "3.75 m", "B": "37.5 m", "C": "375 m", "D": "3750 m"}, "correct_answer": "B"},
    {"id": 70, "difficulty": "medium", "question": "A road is 18 km long. How many meters?", "options": {"A": "180 m", "B": "1800 m", "C": "18000 m", "D": "180000 m"}, "correct_answer": "C"},
    {"id": 71, "difficulty": "medium", "question": "Convert 2 m 95 cm to cm", "options": {"A": "29.5 cm", "B": "295 cm", "C": "2095 cm", "D": "2950 cm"}, "correct_answer": "B"},
    {"id": 72, "difficulty": "medium", "question": "A bridge span is 1.2 km. How many meters?", "options": {"A": "12 m", "B": "120 m", "C": "1200 m", "D": "12000 m"}, "correct_answer": "C"},
    {"id": 73, "difficulty": "medium", "question": "Convert 4125 cm to meters", "options": {"A": "4.125 m", "B": "41.25 m", "C": "412.5 m", "D": "4125 m"}, "correct_answer": "B"},
    {"id": 74, "difficulty": "medium", "question": "A railway line is 45 km long. How many meters?", "options": {"A": "450 m", "B": "4500 m", "C": "45000 m", "D": "450000 m"}, "correct_answer": "C"},
    {"id": 75, "difficulty": "medium", "question": "Convert 7 m 40 cm to cm", "options": {"A": "74 cm", "B": "740 cm", "C": "7040 cm", "D": "7400 cm"}, "correct_answer": "B"},
    {"id": 76, "difficulty": "medium", "question": "A power line is 0.3 km long. How many meters?", "options": {"A": "3 m", "B": "30 m", "C": "300 m", "D": "3000 m"}, "correct_answer": "C"},
    {"id": 77, "difficulty": "medium", "question": "Convert 4500 cm to meters", "options": {"A": "4.5 m", "B": "45 m", "C": "450 m", "D": "4500 m"}, "correct_answer": "B"},
    {"id": 78, "difficulty": "medium", "question": "A walking trail is 6.5 km long. How many meters?", "options": {"A": "65 m", "B": "650 m", "C": "6500 m", "D": "65000 m"}, "correct_answer": "C"},
    {"id": 79, "difficulty": "medium", "question": "Convert 8 m 85 cm to cm", "options": {"A": "88.5 cm", "B": "885 cm", "C": "8085 cm", "D": "8850 cm"}, "correct_answer": "B"},
    {"id": 80, "difficulty": "medium", "question": "A cable car line is 2.4 km long. How many meters?", "options": {"A": "24 m", "B": "240 m", "C": "2400 m", "D": "24000 m"}, "correct_answer": "C"},

    {"id": 81, "difficulty": "hard", "question": "If 1 inch = 2.54 cm, how many cm in 10 inches?", "options": {"A": "2.54 cm", "B": "25.4 cm", "C": "254 cm", "D": "2540 cm"}, "correct_answer": "B"},
    {"id": 82, "difficulty": "hard", "question": "1 foot = 12 inches = ___ cm (approx)", "options": {"A": "30 cm", "B": "30.48 cm", "C": "300 cm", "D": "304.8 cm"}, "correct_answer": "B"},
    {"id": 83, "difficulty": "hard", "question": "1 yard = 3 feet = ___ cm (approx)", "options": {"A": "30 cm", "B": "91.44 cm", "C": "300 cm", "D": "914.4 cm"}, "correct_answer": "B"},
    {"id": 84, "difficulty": "hard", "question": "1 mile = 1.609 km = ___ meters", "options": {"A": "160.9 m", "B": "1609 m", "C": "16090 m", "D": "160900 m"}, "correct_answer": "B"},
    {"id": 85, "difficulty": "hard", "question": "1 km = ___ cm", "options": {"A": "100 cm", "B": "1000 cm", "C": "10000 cm", "D": "100000 cm"}, "correct_answer": "D"},
    {"id": 86, "difficulty": "hard", "question": "If a scale is 1:100, then 1 cm on map = ___ in real", "options": {"A": "1 cm", "B": "10 cm", "C": "100 cm", "D": "1000 cm"}, "correct_answer": "C"},
    {"id": 87, "difficulty": "hard", "question": "1 nautical mile = 1.852 km = ___ meters", "options": {"A": "185.2 m", "B": "1852 m", "C": "18520 m", "D": "185200 m"}, "correct_answer": "B"},
    {"id": 88, "difficulty": "hard", "question": "1 light year = 9.46 trillion km = ___ meters (approx)", "options": {"A": "9.46 × 10^9 m", "B": "9.46 × 10^12 m", "C": "9.46 × 10^15 m", "D": "9.46 × 10^18 m"}, "correct_answer": "C"},
    {"id": 89, "difficulty": "hard", "question": "1 astronomical unit = 149.6 million km = ___ meters", "options": {"A": "1.496 × 10^8 m", "B": "1.496 × 10^11 m", "C": "1.496 × 10^14 m", "D": "1.496 × 10^17 m"}, "correct_answer": "B"},
    {"id": 90, "difficulty": "hard", "question": "1 parsec = 3.26 light years = ___ km (approx)", "options": {"A": "3.08 × 10^10 km", "B": "3.08 × 10^13 km", "C": "3.08 × 10^16 km", "D": "3.08 × 10^19 km"}, "correct_answer": "B"},
    {"id": 91, "difficulty": "hard", "question": "1 micrometer = ___ cm", "options": {"A": "0.0001 cm", "B": "0.001 cm", "C": "0.01 cm", "D": "0.1 cm"}, "correct_answer": "A"},
    {"id": 92, "difficulty": "hard", "question": "1 nanometer = ___ cm", "options": {"A": "10^-9 cm", "B": "10^-7 cm", "C": "10^-5 cm", "D": "10^-3 cm"}, "correct_answer": "B"},
    {"id": 93, "difficulty": "hard", "question": "1 angstrom = 10^-10 m = ___ cm", "options": {"A": "10^-12 cm", "B": "10^-10 cm", "C": "10^-8 cm", "D": "10^-6 cm"}, "correct_answer": "C"},
    {"id": 94, "difficulty": "hard", "question": "Earth's circumference = 40,075 km = ___ cm", "options": {"A": "4.0075 × 10^8 cm", "B": "4.0075 × 10^9 cm", "C": "4.0075 × 10^10 cm", "D": "4.0075 × 10^11 cm"}, "correct_answer": "B"},
    {"id": 95, "difficulty": "hard", "question": "1 hectare = 10,000 m² = side of ___ m square", "options": {"A": "10 m", "B": "100 m", "C": "1000 m", "D": "10000 m"}, "correct_answer": "B"},
    {"id": 96, "difficulty": "hard", "question": "Speed of light = 299,792,458 m/s = ___ cm/s", "options": {"A": "2.9979 × 10^8 cm/s", "B": "2.9979 × 10^10 cm/s", "C": "2.9979 × 10^12 cm/s", "D": "2.9979 × 10^14 cm/s"}, "correct_answer": "B"},
    {"id": 97, "difficulty": "hard", "question": "1 square km = ___ square cm", "options": {"A": "10^6 cm²", "B": "10^8 cm²", "C": "10^10 cm²", "D": "10^12 cm²"}, "correct_answer": "C"},
    {"id": 98, "difficulty": "hard", "question": "Volume of 1 cubic meter = ___ cubic cm", "options": {"A": "10^3 cm³", "B": "10^4 cm³", "C": "10^5 cm³", "D": "10^6 cm³"}, "correct_answer": "D"},
    {"id": 99, "difficulty": "hard", "question": "Density of water = 1 g/cm³ = ___ kg/m³", "options": {"A": "10 kg/m³", "B": "100 kg/m³", "C": "1000 kg/m³", "D": "10000 kg/m³"}, "correct_answer": "C"},
    {"id": 100, "difficulty": "hard", "question": "1 metric ton = 1000 kg = weight of 1 cubic meter of ___", "options": {"A": "air", "B": "water", "C": "iron", "D": "wood"}, "correct_answer": "B"}
  ]
}