{
  "title": "Subtraction with Multi-borrow (4-digit) - Grade 4",
  "total_questions": 60,
  "questions": [


    {"id": 1, "difficulty": "easy", "question": "What is 4,205 - 1,129?", "options": {"A": "3,076", "B": "3,086", "C": "3,096", "D": "3,066"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "Subtract: 6,310 - 3,145", "options": {"A": "3,155", "B": "3,165", "C": "3,125", "D": "3,205"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "What is 7,804 - 4,219?", "options": {"A": "3,575", "B": "3,585", "C": "3,595", "D": "3,565"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "Calculate: 5,672 - 2,458", "options": {"A": "3,214", "B": "3,204", "C": "3,224", "D": "3,214"}, "correct_answer": "D"},

    {"id": 5, "difficulty": "easy", "question": "Subtract: 8,903 - 5,627", "options": {"A": "3,276", "B": "3,286", "C": "3,266", "D": "3,296"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "What is 9,450 - 6,278?", "options": {"A": "3,172", "B": "3,182", "C": "3,192", "D": "3,162"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "Subtract: 7,602 - 3,399", "options": {"A": "4,203", "B": "4,193", "C": "4,213", "D": "4,223"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "What is 6,780 - 2,549?", "options": {"A": "4,231", "B": "4,221", "C": "4,241", "D": "4,251"}, "correct_answer": "D"},

    {"id": 9, "difficulty": "easy", "question": "Calculate: 5,900 - 3,478", "options": {"A": "2,422", "B": "2,412", "C": "2,432", "D": "2,442"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "What is 8,201 - 4,923?", "options": {"A": "3,268", "B": "3,278", "C": "3,288", "D": "3,258"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Subtract: 9,500 - 6,321", "options": {"A": "3,179", "B": "3,169", "C": "3,189", "D": "3,199"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Calculate: 7,420 - 3,258", "options": {"A": "4,162", "B": "4,152", "C": "4,172", "D": "4,182"}, "correct_answer": "D"},

    {"id": 13, "difficulty": "easy", "question": "What is 6,703 - 2,461?", "options": {"A": "4,242", "B": "4,232", "C": "4,252", "D": "4,222"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "Subtract: 9,120 - 4,957", "options": {"A": "4,163", "B": "4,173", "C": "4,153", "D": "4,183"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "What is 8,700 - 5,419?", "options": {"A": "3,281", "B": "3,291", "C": "3,301", "D": "3,271"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "Calculate: 7,300 - 2,178", "options": {"A": "5,122", "B": "5,112", "C": "5,132", "D": "5,142"}, "correct_answer": "D"},

    {"id": 17, "difficulty": "easy", "question": "What is 5,809 - 3,126?", "options": {"A": "2,683", "B": "2,673", "C": "2,693", "D": "2,703"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Subtract: 9,640 - 6,482?", "options": {"A": "3,158", "B": "3,168", "C": "3,148", "D": "3,178"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "What is 8,350 - 4,129?", "options": {"A": "4,221", "B": "4,211", "C": "4,231", "D": "4,241"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "Calculate: 6,780 - 3,459?", "options": {"A": "3,321", "B": "3,311", "C": "3,331", "D": "3,341"}, "correct_answer": "D"},

  
    {"id": 21, "difficulty": "medium", "question": "What is 4,002 - 1,256?", "options": {"A": "2,746", "B": "2,756", "C": "2,736", "D": "2,766"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Subtract: 6,505 - 2,889", "options": {"A": "3,616", "B": "3,626", "C": "3,606", "D": "3,596"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "What is 8,107 - 3,564?", "options": {"A": "4,543", "B": "4,533", "C": "4,553", "D": "4,563"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "Calculate: 7,400 - 4,678", "options": {"A": "2,722", "B": "2,712", "C": "2,732", "D": "2,742"}, "correct_answer": "D"},

    {"id": 25, "difficulty": "medium", "question": "What is 9,201 - 5,685?", "options": {"A": "3,516", "B": "3,526", "C": "3,506", "D": "3,496"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "Subtract: 5,804 - 2,447", "options": {"A": "3,357", "B": "3,367", "C": "3,347", "D": "3,377"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Calculate: 6,903 - 3,278", "options": {"A": "3,625", "B": "3,615", "C": "3,635", "D": "3,645"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "What is 8,602 - 4,358?", "options": {"A": "4,244", "B": "4,234", "C": "4,254", "D": "4,264"}, "correct_answer": "D"},

    {"id": 29, "difficulty": "medium", "question": "Subtract: 7,109 - 5,556?", "options": {"A": "1,553", "B": "1,543", "C": "1,563", "D": "1,573"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "What is 9,304 - 6,678?", "options": {"A": "2,626", "B": "2,636", "C": "2,616", "D": "2,646"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "Calculate: 5,908 - 1,169?", "options": {"A": "4,739", "B": "4,729", "C": "4,749", "D": "4,759"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "What is 6,807 - 2,448?", "options": {"A": "4,359", "B": "4,349", "C": "4,369", "D": "4,379"}, "correct_answer": "D"},

    {"id": 33, "difficulty": "medium", "question": "Subtract: 8,608 - 3,339?", "options": {"A": "5,269", "B": "5,259", "C": "5,279", "D": "5,289"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "What is 7,509 - 4,444?", "options": {"A": "3,065", "B": "3,055", "C": "3,075", "D": "3,085"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Calculate: 9,209 - 5,785?", "options": {"A": "3,424", "B": "3,434", "C": "3,414", "D": "3,444"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "What is 6,504 - 2,222?", "options": {"A": "4,282", "B": "4,272", "C": "4,292", "D": "4,302"}, "correct_answer": "D"},

    {"id": 37, "difficulty": "medium", "question": "Subtract: 8,306 - 3,333?", "options": {"A": "4,973", "B": "4,963", "C": "4,983", "D": "4,993"}, "correct_answer": "A"},
    {"id": 38, "difficulty": "medium", "question": "What is 7,407 - 4,444?", "options": {"A": "2,963", "B": "2,953", "C": "2,973", "D": "2,983"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "Calculate: 9,108 - 5,555?", "options": {"A": "3,553", "B": "3,543", "C": "3,563", "D": "3,573"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "What is 5,909 - 1,111?", "options": {"A": "4,798", "B": "4,788", "C": "4,808", "D": "4,818"}, "correct_answer": "D"},


    {"id": 41, "difficulty": "hard", "question": "What is 4,000 - 1,257?", "options": {"A": "2,743", "B": "2,753", "C": "2,733", "D": "2,723"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "Subtract: 6,000 - 2,845", "options": {"A": "3,155", "B": "3,165", "C": "3,145", "D": "3,135"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "What is 8,000 - 3,678?", "options": {"A": "4,322", "B": "4,332", "C": "4,312", "D": "4,302"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "Calculate: 7,000 - 4,589", "options": {"A": "2,411", "B": "2,421", "C": "2,401", "D": "2,391"}, "correct_answer": "D"},

    {"id": 45, "difficulty": "hard", "question": "Subtract: 9,000 - 5,789", "options": {"A": "3,211", "B": "3,221", "C": "3,201", "D": "3,191"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "What is 5,000 - 2,263?", "options": {"A": "2,737", "B": "2,747", "C": "2,727", "D": "2,717"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "Calculate: 6,000 - 3,448", "options": {"A": "2,552", "B": "2,562", "C": "2,542", "D": "2,532"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "What is 8,000 - 4,567?", "options": {"A": "3,433", "B": "3,443", "C": "3,423", "D": "3,413"}, "correct_answer": "D"},

    {"id": 49, "difficulty": "hard", "question": "Subtract: 7,000 - 5,555", "options": {"A": "1,445", "B": "1,455", "C": "1,435", "D": "1,425"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "What is 9,000 - 6,789?", "options": {"A": "2,211", "B": "2,221", "C": "2,201", "D": "2,191"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "hard", "question": "Calculate: 5,000 - 1,278?", "options": {"A": "3,722", "B": "3,732", "C": "3,712", "D": "3,702"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "What is 6,000 - 2,345?", "options": {"A": "3,655", "B": "3,665", "C": "3,645", "D": "3,635"}, "correct_answer": "D"},

    {"id": 53, "difficulty": "hard", "question": "Subtract: 8,000 - 3,333?", "options": {"A": "4,667", "B": "4,677", "C": "4,657", "D": "4,647"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "What is 7,000 - 4,444?", "options": {"A": "2,556", "B": "2,566", "C": "2,546", "D": "2,536"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "Calculate: 9,000 - 5,555?", "options": {"A": "3,445", "B": "3,455", "C": "3,435", "D": "3,425"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "What is 6,000 - 2,222?", "options": {"A": "3,778", "B": "3,788", "C": "3,768", "D": "3,758"}, "correct_answer": "D"},

    {"id": 57, "difficulty": "hard", "question": "Subtract: 8,000 - 3,789?", "options": {"A": "4,211", "B": "4,221", "C": "4,201", "D": "4,191"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "What is 7,000 - 4,268?", "options": {"A": "2,732", "B": "2,742", "C": "2,722", "D": "2,712"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Calculate: 9,000 - 6,556?", "options": {"A": "2,444", "B": "2,454", "C": "2,434", "D": "2,424"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "What is 8,000 - 3,222?", "options": {"A": "4,778", "B": "4,788", "C": "4,768", "D": "4,758"}, "correct_answer": "D"}

  ]
}