{
  "title": "Subtraction of Decimals (Decimals) - Grade 6 CBSE",
  "total_questions": 150,
  "questions": [


    {"id": 1, "difficulty": "easy", "question": "What is 5.2 - 3.1?", "options": {"A": "2.1", "B": "2.0", "C": "2.2", "D": "2.3"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "Subtract: 7.8 - 2.5", "options": {"A": "5.2", "B": "5.3", "C": "5.4", "D": "5.5"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Calculate: 9.6 - 4.3", "options": {"A": "5.2", "B": "5.3", "C": "5.3", "D": "5.4"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "What is 8.5 - 3.0?", "options": {"A": "5.0", "B": "5.4", "C": "5.5", "D": "5.6"}, "correct_answer": "D"},

    {"id": 5, "difficulty": "easy", "question": "Subtract: 6.7 - 1.2", "options": {"A": "5.5", "B": "5.4", "C": "5.6", "D": "5.7"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "Calculate: 4.9 - 2.4", "options": {"A": "2.4", "B": "2.5", "C": "2.6", "D": "2.7"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "What is 10.0 - 5.5?", "options": {"A": "4.0", "B": "4.4", "C": "4.5", "D": "4.6"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "Subtract: 12.3 - 7.8", "options": {"A": "4.4", "B": "4.5", "C": "4.6", "D": "4.7"}, "correct_answer": "D"},

    {"id": 9, "difficulty": "easy", "question": "Calculate: 15.5 - 10.0", "options": {"A": "5.5", "B": "5.0", "C": "6.0", "D": "6.5"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "What is 3.6 - 1.1?", "options": {"A": "2.4", "B": "2.5", "C": "2.6", "D": "2.7"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Subtract: 5.0 - 2.5", "options": {"A": "2.0", "B": "2.5", "C": "3.0", "D": "3.5"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Calculate: 8.2 - 3.7", "options": {"A": "4.4", "B": "4.5", "C": "4.6", "D": "4.7"}, "correct_answer": "D"},

    {"id": 13, "difficulty": "easy", "question": "What is 7.9 - 4.4?", "options": {"A": "3.4", "B": "3.5", "C": "3.6", "D": "3.7"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "Subtract: 11.1 - 6.6", "options": {"A": "4.4", "B": "4.5", "C": "4.6", "D": "4.7"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Calculate: 9.0 - 3.5", "options": {"A": "5.4", "B": "5.5", "C": "5.6", "D": "5.7"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "What is 6.5 - 2.0?", "options": {"A": "4.4", "B": "4.5", "C": "4.6", "D": "4.7"}, "correct_answer": "D"},

    {"id": 17, "difficulty": "easy", "question": "Subtract: 10.5 - 5.0", "options": {"A": "5.5", "B": "5.0", "C": "6.0", "D": "6.5"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Calculate: 13.7 - 8.2", "options": {"A": "5.4", "B": "5.5", "C": "5.6", "D": "5.7"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "What is 4.8 - 1.3?", "options": {"A": "3.4", "B": "3.5", "C": "3.6", "D": "3.7"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "Subtract: 14.0 - 9.5", "options": {"A": "4.4", "B": "4.5", "C": "4.6", "D": "4.7"}, "correct_answer": "D"},


    {"id": 21, "difficulty": "medium", "question": "Calculate: 12.34 - 5.67", "options": {"A": "6.67", "B": "6.66", "C": "6.65", "D": "6.64"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Subtract: 25.75 - 13.25", "options": {"A": "12.10", "B": "12.50", "C": "12.75", "D": "13.00"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "What is 45.89 - 23.45?", "options": {"A": "22.44", "B": "22.34", "C": "22.54", "D": "22.64"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "Calculate: 78.56 - 34.12", "options": {"A": "44.33", "B": "44.34", "C": "44.44", "D": "44.54"}, "correct_answer": "D"},

    {"id": 25, "difficulty": "medium", "question": "Subtract: 99.99 - 88.88", "options": {"A": "11.11", "B": "11.13", "C": "11.14", "D": "11.15"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "What is 123.45 - 67.89?", "options": {"A": "55.66", "B": "55.56", "C": "55.76", "D": "55.86"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Calculate: 150.75 - 75.25", "options": {"A": "75.00", "B": "75.50", "C": "75.25", "D": "75.75"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "Subtract: 200.50 - 125.75", "options": {"A": "74.65", "B": "74.85", "C": "74.75", "D": "74.95"}, "correct_answer": "D"},

    {"id": 29, "difficulty": "medium", "question": "What is 333.33 - 222.22?", "options": {"A": "111.11", "B": "111.12", "C": "111.13", "D": "111.14"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "Calculate: 456.78 - 234.56", "options": {"A": "222.21", "B": "222.22", "C": "222.33", "D": "222.43"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "Subtract: 7.5 - 3.75", "options": {"A": "3.60", "B": "3.65", "C": "3.75", "D": "3.80"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "What is 12.345 - 6.789?", "options": {"A": "5.556", "B": "5.566", "C": "5.576", "D": "5.586"}, "correct_answer": "D"},

    {"id": 33, "difficulty": "medium", "question": "Calculate: 89.10 - 45.55", "options": {"A": "43.55", "B": "43.45", "C": "43.65", "D": "43.75"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "Subtract: 100.00 - 49.99", "options": {"A": "50.00", "B": "50.01", "C": "50.10", "D": "50.11"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "What is 67.89 - 23.45?", "options": {"A": "44.50", "B": "44.54", "C": "44.44", "D": "44.34"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "Calculate: 125.75 - 87.50", "options": {"A": "38.05", "B": "38.15", "C": "38.25", "D": "38.35"}, "correct_answer": "D"},

    {"id": 37, "difficulty": "medium", "question": "Subtract: 9.876 - 5.432", "options": {"A": "4.444", "B": "4.454", "C": "4.464", "D": "4.474"}, "correct_answer": "A"},
    {"id": 38, "difficulty": "medium", "question": "What is 55.55 - 44.45?", "options": {"A": "11.00", "B": "11.10", "C": "11.20", "D": "11.30"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "Calculate: 33.33 - 22.22", "options": {"A": "11.10", "B": "11.11", "C": "11.12", "D": "11.13"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "Subtract: 77.77 - 33.33", "options": {"A": "44.30", "B": "44.34", "C": "44.44", "D": "44.54"}, "correct_answer": "D"},

 
    {"id": 41, "difficulty": "hard", "question": "Calculate: 1234.5678 - 987.6543", "options": {"A": "246.9135", "B": "246.9235", "C": "246.9335", "D": "246.9435"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "Subtract: 9999.9999 - 8888.8888", "options": {"A": "1111.1101", "B": "1111.1111", "C": "1111.1121", "D": "1111.1131"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "What is 5555.5555 - 4444.4444?", "options": {"A": "1111.1100", "B": "1111.1111", "C": "1111.1122", "D": "1111.1133"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "Calculate: 7777.7777 - 6666.6666", "options": {"A": "1111.1000", "B": "1111.1100", "C": "1111.1111", "D": "1111.1122"}, "correct_answer": "D"},

    {"id": 45, "difficulty": "hard", "question": "Subtract: 123.456789 - 98.765432", "options": {"A": "24.691357", "B": "24.691367", "C": "24.691377", "D": "24.691387"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "What is 987.654321 - 123.456789?", "options": {"A": "864.197421", "B": "864.197531", "C": "864.197541", "D": "864.197551"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "Calculate: 1000.0001 - 999.9999", "options": {"A": "0.0002", "B": "0.0001", "C": "0.0003", "D": "0.0004"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "Subtract: 8888.8888 - 7777.7777", "options": {"A": "1111.1000", "B": "1111.1100", "C": "1111.1111", "D": "1111.1122"}, "correct_answer": "D"},

    {"id": 49, "difficulty": "hard", "question": "What is 3333.3333 - 2222.2222?", "options": {"A": "1111.1100", "B": "1111.1111", "C": "1111.1122", "D": "1111.1133"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "Calculate: 4444.4444 - 3333.3333", "options": {"A": "1111.1100", "B": "1111.1110", "C": "1111.1111", "D": "1111.1112"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "hard", "question": "Subtract: 6666.6666 - 5555.5555", "options": {"A": "1110.1111", "B": "1111.0000", "C": "1111.1111", "D": "1111.1222"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "What is 999.999999 - 888.888888?", "options": {"A": "111.111000", "B": "111.111111", "C": "111.111222", "D": "111.111333"}, "correct_answer": "D"},

    {"id": 53, "difficulty": "hard", "question": "Calculate: 1234.56789 - 987.65432", "options": {"A": "246.91357", "B": "246.91367", "C": "246.91377", "D": "246.91387"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "Subtract: 5555.55555 - 4444.44444", "options": {"A": "1111.11011", "B": "1111.11111", "C": "1111.11211", "D": "1111.11311"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "What is 7777.77777 - 6666.66666?", "options": {"A": "1111.11011", "B": "1111.11111", "C": "1111.11211", "D": "1111.11311"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "Calculate: 9999.99999 - 8888.88888", "options": {"A": "1111.11111", "B": "1111.11110", "C": "1111.11112", "D": "1111.11113"}, "correct_answer": "D"},

    {"id": 57, "difficulty": "hard", "question": "Subtract: 123.4567890 - 98.7654321", "options": {"A": "24.6913569", "B": "24.6913579", "C": "24.6913589", "D": "24.6913599"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "What is 987.6543210 - 123.4567890?", "options": {"A": "864.1975320", "B": "864.1975330", "C": "864.1975340", "D": "864.1975350"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Calculate: 10000.00001 - 9999.99999", "options": {"A": "0.00001", "B": "0.00002", "C": "0.00003", "D": "0.00004"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "Subtract: 54321.12345 - 12345.54321", "options": {"A": "41975.58024", "B": "41975.58034", "C": "41975.58044", "D": "41975.58054"}, "correct_answer": "D"}
  ,
{"id":61,"difficulty":"easy","question":"What is 6.4 - 2.1?","options":{"A":"4.1","B":"4.2","C":"4.3","D":"4.4"},"correct_answer":"C"},
  {"id":62,"difficulty":"easy","question":"Subtract: 9.0 - 3.6","options":{"A":"5.2","B":"5.3","C":"5.4","D":"5.5"},"correct_answer":"D"},
  {"id":63,"difficulty":"easy","question":"Calculate: 7.5 - 4.0","options":{"A":"3.5","B":"3.4","C":"3.6","D":"3.7"},"correct_answer":"A"},
  {"id":64,"difficulty":"easy","question":"What is 8.2 - 5.1?","options":{"A":"3.0","B":"3.1","C":"3.2","D":"3.3"},"correct_answer":"B"},
  {"id":65,"difficulty":"easy","question":"Subtract: 10.0 - 6.8","options":{"A":"3.0","B":"3.1","C":"3.2","D":"3.3"},"correct_answer":"C"},
  {"id":66,"difficulty":"easy","question":"Calculate: 5.9 - 2.7","options":{"A":"3.1","B":"3.2","C":"3.3","D":"3.4"},"correct_answer":"B"},
  {"id":67,"difficulty":"easy","question":"What is 4.6 - 1.4?","options":{"A":"3.0","B":"3.1","C":"3.2","D":"3.3"},"correct_answer":"C"},
  {"id":68,"difficulty":"easy","question":"Subtract: 12.0 - 7.5","options":{"A":"4.4","B":"4.5","C":"4.6","D":"4.7"},"correct_answer":"B"},
  {"id":69,"difficulty":"easy","question":"Calculate: 9.3 - 6.1","options":{"A":"3.0","B":"3.1","C":"3.2","D":"3.3"},"correct_answer":"C"},
  {"id":70,"difficulty":"easy","question":"What is 11.5 - 8.0?","options":{"A":"3.4","B":"3.5","C":"3.6","D":"3.7"},"correct_answer":"B"},
  {"id":71,"difficulty":"easy","question":"Subtract: 6.8 - 3.5","options":{"A":"3.1","B":"3.2","C":"3.3","D":"3.4"},"correct_answer":"C"},
  {"id":72,"difficulty":"easy","question":"Calculate: 14.2 - 9.1","options":{"A":"5.0","B":"5.1","C":"5.2","D":"5.3"},"correct_answer":"B"},
  {"id":73,"difficulty":"easy","question":"What is 7.4 - 2.9?","options":{"A":"4.4","B":"4.5","C":"4.6","D":"4.7"},"correct_answer":"B"},
  {"id":74,"difficulty":"easy","question":"Subtract: 13.0 - 6.7","options":{"A":"6.1","B":"6.2","C":"6.3","D":"6.4"},"correct_answer":"C"},
  {"id":75,"difficulty":"easy","question":"Calculate: 8.9 - 4.2","options":{"A":"4.6","B":"4.7","C":"4.8","D":"4.9"},"correct_answer":"B"},
  {"id":76,"difficulty":"easy","question":"What is 5.5 - 1.8?","options":{"A":"3.6","B":"3.7","C":"3.8","D":"3.9"},"correct_answer":"B"},
  {"id":77,"difficulty":"easy","question":"Subtract: 10.4 - 6.2","options":{"A":"4.0","B":"4.1","C":"4.2","D":"4.3"},"correct_answer":"C"},
  {"id":78,"difficulty":"easy","question":"Calculate: 15.0 - 9.6","options":{"A":"5.3","B":"5.4","C":"5.5","D":"5.6"},"correct_answer":"B"},
  {"id":79,"difficulty":"easy","question":"What is 9.7 - 3.8?","options":{"A":"5.8","B":"5.9","C":"6.0","D":"6.1"},"correct_answer":"B"},
  {"id":80,"difficulty":"easy","question":"Subtract: 12.6 - 4.4","options":{"A":"8.0","B":"8.1","C":"8.2","D":"8.3"},"correct_answer":"C"},

 
  {"id":81,"difficulty":"medium","question":"Calculate: 18.45 - 9.78","options":{"A":"8.57","B":"8.67","C":"8.77","D":"8.87"},"correct_answer":"B"},
  {"id":82,"difficulty":"medium","question":"Subtract: 24.6 - 13.85","options":{"A":"10.65","B":"10.75","C":"10.85","D":"10.95"},"correct_answer":"C"},
  {"id":83,"difficulty":"medium","question":"What is 32.75 - 18.4?","options":{"A":"14.25","B":"14.35","C":"14.45","D":"14.55"},"correct_answer":"B"},
  {"id":84,"difficulty":"medium","question":"Calculate: 40.2 - 17.68","options":{"A":"22.42","B":"22.52","C":"22.62","D":"22.72"},"correct_answer":"B"},
  {"id":85,"difficulty":"medium","question":"Subtract: 56.9 - 23.75","options":{"A":"33.05","B":"33.15","C":"33.25","D":"33.35"},"correct_answer":"C"},
  {"id":86,"difficulty":"medium","question":"What is 72.5 - 38.96?","options":{"A":"33.44","B":"33.54","C":"33.64","D":"33.74"},"correct_answer":"B"},
  {"id":87,"difficulty":"medium","question":"Calculate: 90.08 - 45.9","options":{"A":"44.08","B":"44.18","C":"44.28","D":"44.38"},"correct_answer":"B"},
  {"id":88,"difficulty":"medium","question":"Subtract: 64.75 - 29.68","options":{"A":"35.07","B":"35.17","C":"35.27","D":"35.37"},"correct_answer":"A"},
  {"id":89,"difficulty":"medium","question":"What is 100.5 - 47.85?","options":{"A":"52.55","B":"52.65","C":"52.75","D":"52.85"},"correct_answer":"B"},
  {"id":90,"difficulty":"medium","question":"Calculate: 85.3 - 39.47","options":{"A":"45.73","B":"45.83","C":"45.93","D":"46.03"},"correct_answer":"A"},

  {"id":91,"difficulty":"medium","question":"Calculate: 47.6 - 18.35","options":{"A":"29.15","B":"29.25","C":"29.35","D":"29.45"},"correct_answer":"B"},
  {"id":92,"difficulty":"medium","question":"Subtract: 62.4 - 27.85","options":{"A":"34.45","B":"34.55","C":"34.65","D":"34.75"},"correct_answer":"B"},
  {"id":93,"difficulty":"medium","question":"What is 95.75 - 48.6?","options":{"A":"47.05","B":"47.15","C":"47.25","D":"47.35"},"correct_answer":"B"},
  {"id":94,"difficulty":"medium","question":"Calculate: 73.2 - 36.48","options":{"A":"36.62","B":"36.72","C":"36.82","D":"36.92"},"correct_answer":"B"},
  {"id":95,"difficulty":"medium","question":"Subtract: 84.9 - 29.75","options":{"A":"55.05","B":"55.15","C":"55.25","D":"55.35"},"correct_answer":"C"},
  {"id":96,"difficulty":"medium","question":"What is 120.6 - 58.45?","options":{"A":"62.05","B":"62.15","C":"62.25","D":"62.35"},"correct_answer":"B"},
  {"id":97,"difficulty":"medium","question":"Calculate: 66.08 - 27.9","options":{"A":"38.08","B":"38.18","C":"38.28","D":"38.38"},"correct_answer":"B"},
  {"id":98,"difficulty":"medium","question":"Subtract: 54.75 - 18.68","options":{"A":"36.07","B":"36.17","C":"36.27","D":"36.37"},"correct_answer":"A"},
  {"id":99,"difficulty":"medium","question":"What is 132.5 - 67.85?","options":{"A":"64.55","B":"64.65","C":"64.75","D":"64.85"},"correct_answer":"B"},
  {"id":100,"difficulty":"medium","question":"Calculate: 98.3 - 42.47","options":{"A":"55.73","B":"55.83","C":"55.93","D":"56.03"},"correct_answer":"A"},

  {"id":101,"difficulty":"medium","question":"Subtract: 75.6 - 28.95","options":{"A":"46.55","B":"46.65","C":"46.75","D":"46.85"},"correct_answer":"B"},
  {"id":102,"difficulty":"medium","question":"What is 110.25 - 39.8?","options":{"A":"70.35","B":"70.45","C":"70.55","D":"70.65"},"correct_answer":"B"},
  {"id":103,"difficulty":"medium","question":"Calculate: 88.4 - 53.27","options":{"A":"35.03","B":"35.13","C":"35.23","D":"35.33"},"correct_answer":"C"},
  {"id":104,"difficulty":"medium","question":"Subtract: 64.9 - 27.46","options":{"A":"37.34","B":"37.44","C":"37.54","D":"37.64"},"correct_answer":"B"},
  {"id":105,"difficulty":"medium","question":"What is 142.75 - 68.9?","options":{"A":"73.75","B":"73.85","C":"73.95","D":"74.05"},"correct_answer":"B"},
  {"id":106,"difficulty":"medium","question":"Calculate: 90.08 - 34.65","options":{"A":"55.33","B":"55.43","C":"55.53","D":"55.63"},"correct_answer":"B"},
  {"id":107,"difficulty":"medium","question":"Subtract: 58.6 - 19.75","options":{"A":"38.75","B":"38.85","C":"38.95","D":"39.05"},"correct_answer":"A"},
  {"id":108,"difficulty":"medium","question":"What is 101.4 - 56.28?","options":{"A":"45.02","B":"45.12","C":"45.22","D":"45.32"},"correct_answer":"B"},
  {"id":109,"difficulty":"medium","question":"Calculate: 77.35 - 29.8","options":{"A":"47.45","B":"47.55","C":"47.65","D":"47.75"},"correct_answer":"B"},
  {"id":110,"difficulty":"medium","question":"Subtract: 120.9 - 48.75","options":{"A":"72.05","B":"72.15","C":"72.25","D":"72.35"},"correct_answer":"B"},

  {"id":111,"difficulty":"medium","question":"What is 69.5 - 24.68?","options":{"A":"44.72","B":"44.82","C":"44.92","D":"45.02"},"correct_answer":"B"},
  {"id":112,"difficulty":"medium","question":"Calculate: 150.6 - 78.45","options":{"A":"72.05","B":"72.15","C":"72.25","D":"72.35"},"correct_answer":"B"},
  {"id":113,"difficulty":"medium","question":"Subtract: 82.75 - 39.6","options":{"A":"43.05","B":"43.15","C":"43.25","D":"43.35"},"correct_answer":"B"},
  {"id":114,"difficulty":"medium","question":"What is 96.8 - 57.35?","options":{"A":"39.35","B":"39.45","C":"39.55","D":"39.65"},"correct_answer":"A"},
  {"id":115,"difficulty":"medium","question":"Calculate: 134.2 - 69.48","options":{"A":"64.62","B":"64.72","C":"64.82","D":"64.92"},"correct_answer":"B"},
  {"id":116,"difficulty":"medium","question":"Subtract: 71.6 - 28.95","options":{"A":"42.55","B":"42.65","C":"42.75","D":"42.85"},"correct_answer":"B"},
  {"id":117,"difficulty":"medium","question":"What is 88.05 - 49.8?","options":{"A":"38.15","B":"38.25","C":"38.35","D":"38.45"},"correct_answer":"B"},
  {"id":118,"difficulty":"medium","question":"Calculate: 160.4 - 82.75","options":{"A":"77.55","B":"77.65","C":"77.75","D":"77.85"},"correct_answer":"C"},
  {"id":119,"difficulty":"medium","question":"Subtract: 99.9 - 47.68","options":{"A":"52.12","B":"52.22","C":"52.32","D":"52.42"},"correct_answer":"B"},
  {"id":120,"difficulty":"medium","question":"What is 115.75 - 63.4?","options":{"A":"52.25","B":"52.35","C":"52.45","D":"52.55"},"correct_answer":"B"},

  {"id":121,"difficulty":"medium","question":"Calculate: 74.3 - 28.65","options":{"A":"45.55","B":"45.65","C":"45.75","D":"45.85"},"correct_answer":"B"},
  {"id":122,"difficulty":"medium","question":"Subtract: 140.8 - 76.95","options":{"A":"63.75","B":"63.85","C":"63.95","D":"64.05"},"correct_answer":"B"},
  {"id":123,"difficulty":"medium","question":"What is 93.6 - 47.28?","options":{"A":"46.22","B":"46.32","C":"46.42","D":"46.52"},"correct_answer":"B"},
  {"id":124,"difficulty":"medium","question":"Calculate: 168.5 - 89.75","options":{"A":"78.65","B":"78.75","C":"78.85","D":"78.95"},"correct_answer":"B"},
  {"id":125,"difficulty":"medium","question":"Subtract: 86.4 - 39.85","options":{"A":"46.45","B":"46.55","C":"46.65","D":"46.75"},"correct_answer":"B"},
  {"id":126,"difficulty":"medium","question":"What is 102.9 - 58.46?","options":{"A":"44.34","B":"44.44","C":"44.54","D":"44.64"},"correct_answer":"B"},
  {"id":127,"difficulty":"medium","question":"Calculate: 121.75 - 64.9","options":{"A":"56.75","B":"56.85","C":"56.95","D":"57.05"},"correct_answer":"A"},
  {"id":128,"difficulty":"medium","question":"Subtract: 90.6 - 37.85","options":{"A":"52.65","B":"52.75","C":"52.85","D":"52.95"},"correct_answer":"B"},
  {"id":129,"difficulty":"medium","question":"What is 135.4 - 79.28?","options":{"A":"56.02","B":"56.12","C":"56.22","D":"56.32"},"correct_answer":"B"},
  {"id":130,"difficulty":"medium","question":"Calculate: 160.75 - 84.6","options":{"A":"76.05","B":"76.15","C":"76.25","D":"76.35"},"correct_answer":"B"}
,
  {"id":131,"difficulty":"hard","question":"Calculate: 345.678 - 129.456","options":{"A":"216.122","B":"216.222","C":"216.322","D":"216.422"},"correct_answer":"B"},
  {"id":132,"difficulty":"hard","question":"Subtract: 908.765 - 432.198","options":{"A":"476.567","B":"476.577","C":"476.587","D":"476.597"},"correct_answer":"A"},
  {"id":133,"difficulty":"hard","question":"What is 1200.505 - 678.459?","options":{"A":"522.036","B":"522.046","C":"522.056","D":"522.066"},"correct_answer":"B"},
  {"id":134,"difficulty":"hard","question":"Calculate: 999.999 - 345.678","options":{"A":"654.221","B":"654.311","C":"654.321","D":"654.331"},"correct_answer":"C"},
  {"id":135,"difficulty":"hard","question":"Subtract: 1500.75 - 789.365","options":{"A":"711.285","B":"711.385","C":"711.485","D":"711.585"},"correct_answer":"A"},
  {"id":136,"difficulty":"hard","question":"What is 876.543 - 298.764?","options":{"A":"577.679","B":"577.779","C":"577.789","D":"577.889"},"correct_answer":"C"},
  {"id":137,"difficulty":"hard","question":"Calculate: 4321.987 - 2345.678","options":{"A":"1976.309","B":"1976.319","C":"1976.329","D":"1976.339"},"correct_answer":"A"},
  {"id":138,"difficulty":"hard","question":"Subtract: 6543.21 - 3456.789","options":{"A":"3086.321","B":"3086.331","C":"3086.421","D":"3086.431"},"correct_answer":"A"},
  {"id":139,"difficulty":"hard","question":"What is 9999.5 - 6789.75?","options":{"A":"3209.65","B":"3209.75","C":"3209.85","D":"3209.95"},"correct_answer":"B"},
  {"id":140,"difficulty":"hard","question":"Calculate: 8888.88 - 4444.44","options":{"A":"4444.34","B":"4444.44","C":"4444.54","D":"4444.64"},"correct_answer":"B"},
  {"id":141,"difficulty":"hard","question":"Subtract: 12345.678 - 9876.543","options":{"A":"2469.035","B":"2469.125","C":"2469.135","D":"2469.145"},"correct_answer":"A"},
  {"id":142,"difficulty":"hard","question":"What is 7654.321 - 4321.987?","options":{"A":"3332.334","B":"3332.334","C":"3332.334","D":"3332.334"},"correct_answer":"A"},
  {"id":143,"difficulty":"hard","question":"Calculate: 5432.1 - 1234.567","options":{"A":"4197.533","B":"4197.543","C":"4197.553","D":"4197.563"},"correct_answer":"B"},
  {"id":144,"difficulty":"hard","question":"Subtract: 3210.987 - 1098.765","options":{"A":"2112.212","B":"2112.222","C":"2112.232","D":"2112.242"},"correct_answer":"B"},
  {"id":145,"difficulty":"hard","question":"What is 98765.432 - 12345.678?","options":{"A":"86419.754","B":"86419.754","C":"86419.754","D":"86419.754"},"correct_answer":"A"},
  {"id":146,"difficulty":"hard","question":"Calculate: 45678.9 - 23456.78","options":{"A":"22222.02","B":"22222.12","C":"22222.22","D":"22222.32"},"correct_answer":"C"},
  {"id":147,"difficulty":"hard","question":"Subtract: 8000.008 - 3999.999","options":{"A":"4000.009","B":"4000.010","C":"4000.011","D":"4000.012"},"correct_answer":"A"},
  {"id":148,"difficulty":"hard","question":"What is 6000.6 - 2345.78?","options":{"A":"3654.82","B":"3654.82","C":"3654.82","D":"3654.82"},"correct_answer":"A"},
  {"id":149,"difficulty":"hard","question":"Calculate: 99999.99 - 88888.88","options":{"A":"11111.01","B":"11111.11","C":"11111.21","D":"11111.31"},"correct_answer":"B"},
  {"id":150,"difficulty":"hard","question":"Subtract: 75000.5 - 12345.75","options":{"A":"62654.65","B":"62654.75","C":"62654.85","D":"62654.95"},"correct_answer":"B"}
]
}