{
  "title": "Addition and Subtraction of Expressions - Grade 8 CBSE",
  "total_questions": 60,
  "questions": [


    {"id": 1, "difficulty": "easy", "question": "Simplify: (3x + 5x)", "options": {"A": "8x", "B": "2x", "C": "3x²", "D": "15x"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "Simplify: (7a - 3a)", "options": {"A": "10a", "B": "4a", "C": "a³", "D": "21a"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Add: (x + 4) + (2x + 3)", "options": {"A": "2x + 7", "B": "3x + 7", "C": "x + 1", "D": "4x + 12"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "Subtract: (5y + 6) − (2y + 1)", "options": {"A": "3y + 5", "B": "7y + 7", "C": "y + 5", "D": "3y + 3"}, "correct_answer": "D"},
    {"id": 5, "difficulty": "easy", "question": "Simplify: (9m − 4m)", "options": {"A": "13m", "B": "5m", "C": "6m", "D": "2m"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "Add: (2a + 3b) + (4a + b)", "options": {"A": "6a + 4b", "B": "6a + 3b", "C": "2a + 4b", "D": "6a + 5b"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "Subtract: (10p − 3p)", "options": {"A": "7p", "B": "5p", "C": "13p", "D": "3p"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "Simplify: (6x + 2x − x)", "options": {"A": "9x", "B": "7x", "C": "8x", "D": "5x"}, "correct_answer": "D"},
    {"id": 9, "difficulty": "easy", "question": "Add: (5y + 2) + (3y + 6)", "options": {"A": "8y + 8", "B": "5y + 6", "C": "3y + 8", "D": "8y + 5"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "Subtract: (9x + 4) − (4x + 2)", "options": {"A": "5x + 2", "B": "13x + 6", "C": "5x + 6", "D": "3x + 2"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Simplify: (12a − 7a)", "options": {"A": "19a", "B": "5a", "C": "7a", "D": "3a"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Add: 4m + (3m + 2)", "options": {"A": "7m + 2", "B": "6m + 2", "C": "4m + 5", "D": "7m + 5"}, "correct_answer": "D"},
    {"id": 13, "difficulty": "easy", "question": "Subtract: (8y − 2) − (3y − 1)", "options": {"A": "5y − 1", "B": "5y − 3", "C": "11y − 3", "D": "5y + 3"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "Simplify: (2a + 3a − a)", "options": {"A": "6a", "B": "2a", "C": "4a", "D": "5a"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Add: (x + 1) + (x + 2)", "options": {"A": "2x + 3", "B": "x + 3", "C": "3x + 3", "D": "2x + 2"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "Simplify: (10p + 5p − 3p)", "options": {"A": "12p", "B": "10p", "C": "14p", "D": "13p"}, "correct_answer": "D"},
    {"id": 17, "difficulty": "easy", "question": "Subtract: (6x + 9) − (2x + 3)", "options": {"A": "4x + 6", "B": "3x + 3", "C": "4x + 12", "D": "2x + 6"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Add: (3y − 1) + (2y + 4)", "options": {"A": "5y + 3", "B": "3y + 5", "C": "6y + 3", "D": "5y + 4"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "Simplify: (7a + 2a − 4a)", "options": {"A": "10a", "B": "3a", "C": "5a", "D": "6a"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "Subtract: (4m + 6) − (m + 1)", "options": {"A": "3m + 5", "B": "4m + 5", "C": "3m + 6", "D": "5m + 5"}, "correct_answer": "D"},


    {"id": 21, "difficulty": "medium", "question": "Simplify: (3x + 2y) + (5x − y)", "options": {"A": "8x + y", "B": "8x + y", "C": "8x − y", "D": "2x + 3y"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Simplify: (7a − 2b) − (3a + b)", "options": {"A": "10a − b", "B": "4a − 3b", "C": "4a − 3b", "D": "3a − b"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "Add: (2x − 3y + 5) + (x + y − 2)", "options": {"A": "3x − 2y + 3", "B": "3x − y + 3", "C": "3x − 4y + 7", "D": "2x − 2y + 3"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "Subtract: (8m − 3n + 2) − (5m + n − 4)", "options": {"A": "3m − 4n + 6", "B": "3m − 4n + 6", "C": "13m − 2n − 2", "D": "3m + n + 6"}, "correct_answer": "D"},
    {"id": 25, "difficulty": "medium", "question": "Simplify: (4a + 6b) − (a − 2b)", "options": {"A": "3a + 8b", "B": "3a + 4b", "C": "5a + 4b", "D": "3a + b"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "Add: (5p − 2q + 7) + (3p + q − 4)", "options": {"A": "8p − q + 3", "B": "8p + q + 3", "C": "8p − q + 1", "D": "8p − 3q + 3"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Subtract: (9x + 4y − 3) − (2x − 6y + 5)", "options": {"A": "7x + 10y − 8", "B": "7x + 10y + 2", "C": "11x − 2y − 8", "D": "7x − 2y − 8"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "Simplify: (6m − 3n) + (4m + n − 2)", "options": {"A": "10m − 2n − 2", "B": "10m − 3n", "C": "10m − 2n − 1", "D": "10m − 4n − 2"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "Add: (3a + 2b − 1) + (a − b + 4)", "options": {"A": "4a + b + 3", "B": "4a + b + 3", "C": "4a + 3b + 3", "D": "2a + b + 3"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "Subtract: (7p − q + 6) − (3p + 2q − 1)", "options": {"A": "4p − 3q + 7", "B": "4p − 3q + 7", "C": "10p + q + 7", "D": "4p − q + 7"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "Simplify: (2x + 3y − 4) + (5x − y + 6)", "options": {"A": "7x + 2y + 2", "B": "7x + 4y + 2", "C": "7x + 3y − 2", "D": "7x + y + 2"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "Add: (8a − 2b + 5) + (−3a + b − 3)", "options": {"A": "5a − b + 2", "B": "5a − b + 2", "C": "11a − b + 8", "D": "5a + 3b + 2"}, "correct_answer": "D"},
    {"id": 33, "difficulty": "medium", "question": "Subtract: (5y − 3x + 4) − (2y + x − 2)", "options": {"A": "3y − 4x + 6", "B": "3y − 3x + 6", "C": "3y − 4x + 6", "D": "3y − 3x + 2"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "Simplify: (x − 4y + 6) + (2x + y − 3)", "options": {"A": "3x − 3y + 3", "B": "3x − 5y + 9", "C": "3x − 2y + 3", "D": "x − 2y + 3"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Add: (7p − q + 2) + (−p + 3q − 5)", "options": {"A": "6p + 2q − 3", "B": "6p − q − 3", "C": "8p + 2q − 3", "D": "6p + 4q − 3"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "Subtract: (4m + 6n − 1) − (2m − n − 4)", "options": {"A": "2m + 7n + 3", "B": "2m + 5n + 3", "C": "6m + 5n + 3", "D": "2m + 7n + 5"}, "correct_answer": "D"},
    {"id": 37, "difficulty": "medium", "question": "Simplify: (3x + y − 2) + (−2x + 4y + 5)", "options": {"A": "x + 5y + 3", "B": "x + 3y + 3", "C": "5x + 3y + 3", "D": "x + 2y + 3"}, "correct_answer": "A"},
    {"id": 38, "difficulty": "medium", "question": "Subtract: (6a − 3b + 9) − (4a + b − 2)", "options": {"A": "2a − 4b + 11", "B": "6a − 3b + 11", "C": "10a − 4b + 11", "D": "2a − 3b + 11"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "Add: (x − 2y + 7) + (3x + y − 4)", "options": {"A": "4x − y + 3", "B": "4x + y + 3", "C": "3x − y + 3", "D": "4x − 3y + 3"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "Simplify: (5p + 3q − 4) − (2p − q + 1)", "options": {"A": "3p + 4q − 5", "B": "3p + 2q − 5", "C": "7p + 4q − 5", "D": "3p + 4q − 3"}, "correct_answer": "D"},

   
    {"id": 41, "difficulty": "hard", "question": "Simplify: (3x − 4y + 7) + (5x + 2y − 9) − (2x − 3y + 4)", "options": {"A": "6x + y − 6", "B": "6x + y − 8", "C": "8x + y − 6", "D": "6x + 2y − 6"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "Add: (2a − 3b + 5) + (−4a + b − 2) + (3a + 2b + 1)", "options": {"A": "a + 0b + 4", "B": "a + b + 4", "C": "a − b + 4", "D": "a − 2b + 4"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "Subtract: (6m + 4n − 8) − (3m − 2n + 5) − (m + n − 3)", "options": {"A": "2m + 5n − 10", "B": "2m − 3n − 10", "C": "3m + 3n − 16", "D": "2m + 5n − 16"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "Simplify: 4x − (3x − 2y + 7) + (x + y − 5)", "options": {"A": "2y − 8", "B": "2y − 12", "C": "2x − 2y − 12", "D": "2y − 10"}, "correct_answer": "D"},
    {"id": 45, "difficulty": "hard", "question": "Simplify: (7p − 5q + 6) − (−3p + 2q − 4)", "options": {"A": "10p − 7q + 10", "B": "10p − 3q + 10", "C": "4p − 3q + 2", "D": "10p − 7q + 2"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "Add: (3x + 2y − 9) + (−5x + 4y + 3) + (2x − y + 6)", "options": {"A": "0x + 5y + 0", "B": "0x + 5y + 6", "C": "0x + 5y + 3", "D": "0x + 4y + 0"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "Simplify: (8a − 3b + 4) − (2a + 5b − 6) + (4a − b + 2)", "options": {"A": "10a − 9b + 12", "B": "10a − 9b + 12", "C": "12a − 7b + 12", "D": "10a − 7b + 12"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "Subtract: (5x + y − 8) − (2x − 3y + 4) + (−x + 2y − 1)", "options": {"A": "2x + 6y − 13", "B": "2x + 6y − 15", "C": "2x + 4y − 13", "D": "3x + 6y − 13"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "hard", "question": "Simplify: (9m − 4n + 11) + (3m + 2n − 7) − (5m − n + 6)", "options": {"A": "7m + 5n − 2", "B": "7m − n − 2", "C": "7m − n − 2", "D": "7m + 3n − 2"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "Add: (6p − q + 3) + (−p + 4q − 5) − (3p − 2q + 1)", "options": {"A": "2p + 5q − 3", "B": "2p + 3q − 3", "C": "3p + 5q − 3", "D": "2p + 5q − 1"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "hard", "question": "Simplify: (2x − 3y + 4) − (−4x + y − 6) + (3x + 2y − 1)", "options": {"A": "9x + 0y + 9", "B": "9x + 0y + 9", "C": "8x + 0y + 9", "D": "9x + y + 9"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "Simplify: 4a − (2a − 3b + 7) + (−a + b − 2)", "options": {"A": "a − 4b − 9", "B": "a + 4b − 9", "C": "a − 2b − 9", "D": "a − 4b − 11"}, "correct_answer": "D"},
    {"id": 53, "difficulty": "hard", "question": "Add: (3m − n + 5) + (−2m + 4n − 3) + (m − 2n + 1)", "options": {"A": "2m + n + 3", "B": "2m + n + 3", "C": "3m + n + 3", "D": "2m − 3n + 3"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "Subtract: (8x + y − 4) − (3x − 2y + 6) + (−x + 4y − 3)", "options": {"A": "4x + 7y − 13", "B": "4x + 7y − 9", "C": "4x + 7y − 11", "D": "6x + 7y − 13"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "Simplify: (5p + 3q − 2) + (2p − 4q + 6) − (3p + q − 5)", "options": {"A": "4p − 2q + 9", "B": "4p + 2q + 9", "C": "4p − 2q + 9", "D": "4p + 2q + 7"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "Add: (x − y + 8) + (−2x + 3y − 5) + (4x − y + 2)", "options": {"A": "3x + y + 5", "B": "2x + y + 5", "C": "3x + y + 7", "D": "2x + y + 5"}, "correct_answer": "D"},
    {"id": 57, "difficulty": "hard", "question": "Simplify: (9m − 2n + 5) − (2m + 3n − 6) + (−m + n + 4)", "options": {"A": "6m − 4n + 15", "B": "6m − 4n + 13", "C": "6m − 4n + 15", "D": "7m − 4n + 15"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "Subtract: (4x − 5y + 7) − (2x + y − 3) + (−x + 3y + 4)", "options": {"A": "x − 3y + 14", "B": "x − 3y + 10", "C": "x − 2y + 14", "D": "x − y + 14"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Simplify: (6a + 3b − 1) + (−3a + 4b − 5) − (2a − b + 3)", "options": {"A": "a + 8b − 9", "B": "a + 6b − 9", "C": "a + 7b − 9", "D": "a + 4b − 9"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "Add: (7x − 3y + 9) + (−2x + y − 4) + (x + 2y + 1)", "options": {"A": "6x + 0y + 6", "B": "6x + y + 6", "C": "6x + 0y + 6", "D": "6x − y + 6"}, "correct_answer": "D"}

  ]
}