{
  "title": "Angle Sum Property (Quadrilaterals) - Grade 8 CBSE",
  "total_questions": 60,
  "questions": [

    {"id": 1, "difficulty": "easy", "question": "What is the angle sum of any quadrilateral?", "options": {"A": "360°", "B": "180°", "C": "270°", "D": "300°"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "If three angles of a quadrilateral are 80°, 100°, and 120°, what is the fourth angle?", "options": {"A": "40°", "B": "60°", "C": "70°", "D": "50°"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "If one angle of a quadrilateral is 90°, what is the sum of the remaining three angles?", "options": {"A": "260°", "B": "240°", "C": "270°", "D": "300°"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "A quadrilateral has angles 70°, 110°, and 140°. Find the fourth angle.", "options": {"A": "30°", "B": "40°", "C": "50°", "D": "60°"}, "correct_answer": "D"},
    {"id": 5, "difficulty": "easy", "question": "Find the missing angle if the angles are 100°, 90°, and 80°.", "options": {"A": "90°", "B": "100°", "C": "80°", "D": "70°"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "The sum of two angles of a quadrilateral is 200°. What is the sum of the remaining two angles?", "options": {"A": "160°", "B": "180°", "C": "200°", "D": "150°"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "If one angle is 120°, what is the sum of the other three?", "options": {"A": "240°", "B": "260°", "C": "220°", "D": "200°"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "Angles of a quadrilateral are 60°, 80°, and 90°. Find the fourth.", "options": {"A": "130°", "B": "140°", "C": "150°", "D": "160°"}, "correct_answer": "D"},
    {"id": 9, "difficulty": "easy", "question": "If all angles of a quadrilateral are equal, what is one angle?", "options": {"A": "90°", "B": "100°", "C": "80°", "D": "120°"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "If the angles are 120°, 110°, and 80°, find the fourth.", "options": {"A": "50°", "B": "40°", "C": "60°", "D": "70°"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "What is the sum of opposite angles in any quadrilateral?", "options": {"A": "Varies", "B": "180°", "C": "360°", "D": "90°"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Find the fourth angle: 150°, 90°, 70°.", "options": {"A": "60°", "B": "50°", "C": "40°", "D": "30°"}, "correct_answer": "A"},
    {"id": 13, "difficulty": "easy", "question": "Angles of a quadrilateral add up to?", "options": {"A": "360°", "B": "180°", "C": "270°", "D": "400°"}, "correct_answer": "B"},
    {"id": 14, "difficulty": "easy", "question": "If three angles sum to 250°, missing angle is?", "options": {"A": "100°", "B": "90°", "C": "110°", "D": "120°"}, "correct_answer": "C"},
    {"id": 15, "difficulty": "easy", "question": "In a quadrilateral, if one angle is 75°, remaining sum is?", "options": {"A": "285°", "B": "275°", "C": "295°", "D": "300°"}, "correct_answer": "D"},
    {"id": 16, "difficulty": "easy", "question": "If two angles are 90° each, sum of remaining two is?", "options": {"A": "200°", "B": "180°", "C": "160°", "D": "140°"}, "correct_answer": "A"},
    {"id": 17, "difficulty": "easy", "question": "Find the missing angle: 45°, 135°, 120°.", "options": {"A": "50°", "B": "60°", "C": "70°", "D": "80°"}, "correct_answer": "B"},
    {"id": 18, "difficulty": "easy", "question": "If a quadrilateral has one right angle, remaining angles sum to?", "options": {"A": "260°", "B": "270°", "C": "280°", "D": "300°"}, "correct_answer": "C"},
    {"id": 19, "difficulty": "easy", "question": "Angles: 100°, 95°, 85°. Fourth angle?", "options": {"A": "60°", "B": "70°", "C": "80°", "D": "90°"}, "correct_answer": "D"},
    {"id": 20, "difficulty": "easy", "question": "If angles are 110°, 90°, 60°, the fourth angle is?", "options": {"A": "100°", "B": "90°", "C": "110°", "D": "120°"}, "correct_answer": "A"},


    {"id": 21, "difficulty": "medium", "question": "A quadrilateral has angles 90°, 120°, and 80°. Find fourth angle.", "options": {"A": "70°", "B": "60°", "C": "50°", "D": "40°"}, "correct_answer": "B"},
    {"id": 22, "difficulty": "medium", "question": "Angles of a quadrilateral are in ratio 2:3:4:5. Find smallest angle.", "options": {"A": "40°", "B": "60°", "C": "80°", "D": "20°"}, "correct_answer": "C"},
    {"id": 23, "difficulty": "medium", "question": "Three angles add to 200°. Fourth angle is?", "options": {"A": "140°", "B": "160°", "C": "180°", "D": "120°"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "If two angles are 130° and 110°, sum of other two?", "options": {"A": "130°", "B": "120°", "C": "110°", "D": "90°"}, "correct_answer": "D"},
    {"id": 25, "difficulty": "medium", "question": "If one angle is 150°, what is sum of others?", "options": {"A": "210°", "B": "220°", "C": "230°", "D": "240°"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "In a quadrilateral, two angles are 95° and 85°. Remaining sum?", "options": {"A": "160°", "B": "170°", "C": "180°", "D": "190°"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Angles are in ratio 1:2:3:4. Largest angle?", "options": {"A": "90°", "B": "120°", "C": "150°", "D": "180°"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "If angles are 80°, 100°, and 90°, find the fourth.", "options": {"A": "70°", "B": "80°", "C": "90°", "D": "100°"}, "correct_answer": "B"},
    {"id": 29, "difficulty": "medium", "question": "Quad angles sum to?", "options": {"A": "360°", "B": "180°", "C": "540°", "D": "720°"}, "correct_answer": "C"},
    {"id": 30, "difficulty": "medium", "question": "Angles: 112°, 88°, 75°. Fourth angle?", "options": {"A": "85°", "B": "90°", "C": "95°", "D": "100°"}, "correct_answer": "D"},
    {"id": 31, "difficulty": "medium", "question": "If two angles sum to 250°, remaining sum is?", "options": {"A": "90°", "B": "100°", "C": "110°", "D": "120°"}, "correct_answer": "A"},
    {"id": 32, "difficulty": "medium", "question": "Angles are 70°, 95°, and x. If fourth angle is 110°, find x.", "options": {"A": "85°", "B": "90°", "C": "95°", "D": "105°"}, "correct_answer": "B"},
    {"id": 33, "difficulty": "medium", "question": "If angles are equal, each must be?", "options": {"A": "90°", "B": "80°", "C": "100°", "D": "110°"}, "correct_answer": "C"},
    {"id": 34, "difficulty": "medium", "question": "If three angles are 100°, 120°, and 60°, fourth is?", "options": {"A": "60°", "B": "70°", "C": "80°", "D": "90°"}, "correct_answer": "D"},
    {"id": 35, "difficulty": "medium", "question": "Angles of quad: 2x, 3x, 4x, x. Solve for x.", "options": {"A": "20°", "B": "25°", "C": "30°", "D": "35°"}, "correct_answer": "A"},
    {"id": 36, "difficulty": "medium", "question": "Quad has two right angles. Remaining sum is?", "options": {"A": "180°", "B": "160°", "C": "200°", "D": "140°"}, "correct_answer": "B"},
    {"id": 37, "difficulty": "medium", "question": "If angles are 45°, 75°, 135°, fourth is?", "options": {"A": "105°", "B": "110°", "C": "115°", "D": "120°"}, "correct_answer": "C"},
    {"id": 38, "difficulty": "medium", "question": "Angles in ratio 3:4:5:6. Largest angle?", "options": {"A": "120°", "B": "135°", "C": "150°", "D": "90°"}, "correct_answer": "D"},
    {"id": 39, "difficulty": "medium", "question": "Two angles are 110° and 95°. Remaining sum?", "options": {"A": "155°", "B": "165°", "C": "175°", "D": "185°"}, "correct_answer": "A"},
    {"id": 40, "difficulty": "medium", "question": "Angles: 100°, 100°, 90°. Fourth angle?", "options": {"A": "60°", "B": "70°", "C": "80°", "D": "90°"}, "correct_answer": "B"},

    {"id": 41, "difficulty": "hard", "question": "Angles of quad in ratio 1:2:3:4. Smallest angle?", "options": {"A": "20°", "B": "30°", "C": "40°", "D": "50°"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "If angles are 2x, 3x, 4x, 5x, find x.", "options": {"A": "12°", "B": "15°", "C": "18°", "D": "20°"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "Quad has angles 3x, 4x, 5x, 6x. Largest angle?", "options": {"A": "140°", "B": "150°", "C": "160°", "D": "180°"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "If three angles sum to 290°, fourth is?", "options": {"A": "70°", "B": "60°", "C": "80°", "D": "90°"}, "correct_answer": "D"},
    {"id": 45, "difficulty": "hard", "question": "Angles: x, x+20, x+40, x+60. Solve x.", "options": {"A": "50°", "B": "45°", "C": "40°", "D": "35°"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "Angles: 2x+10, 3x-20, 4x+30, 5x-10. Find x.", "options": {"A": "20°", "B": "25°", "C": "30°", "D": "35°"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "If angles are 100°, 120°, x, 3x, find x.", "options": {"A": "30°", "B": "35°", "C": "40°", "D": "45°"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "Angles: 4x, 5x, 6x, 7x. Find 7x.", "options": {"A": "140°", "B": "150°", "C": "160°", "D": "180°"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "hard", "question": "Angles: 90°, x, 2x, 3x. Find the largest angle.", "options": {"A": "180°", "B": "150°", "C": "160°", "D": "170°"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "Angles: x+10, x+20, x+30, x+40. Find second biggest angle.", "options": {"A": "110°", "B": "120°", "C": "130°", "D": "140°"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "hard", "question": "Angles 3x, 4x, 5x, y sum to 360°. Find y.", "options": {"A": "60°", "B": "50°", "C": "40°", "D": "30°"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "Quad angles: x, 2x, 3x, 4x. Find 3x.", "options": {"A": "90°", "B": "100°", "C": "110°", "D": "120°"}, "correct_answer": "D"},
    {"id": 53, "difficulty": "hard", "question": "If angles are x, 2x, 3x, 4x, find sum of two largest.", "options": {"A": "180°", "B": "200°", "C": "220°", "D": "240°"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "Quad has angles 2x, 3x, 4x, 6x. Find smallest angle.", "options": {"A": "20°", "B": "30°", "C": "40°", "D": "50°"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "Angles: 5x, 4x, 3x, 2x. Find largest angle.", "options": {"A": "150°", "B": "160°", "C": "170°", "D": "180°"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "If angle sum of quad is 360°, smallest angle ratio method: 1:2:3:4 → find 1st angle.", "options": {"A": "30°", "B": "20°", "C": "40°", "D": "50°"}, "correct_answer": "D"},
    {"id": 57, "difficulty": "hard", "question": "Angles: x, x+30, x+60, x+90. Find x.", "options": {"A": "30°", "B": "35°", "C": "40°", "D": "45°"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "Angles: 90°, 80°, x, 2x. Find x.", "options": {"A": "50°", "B": "45°", "C": "40°", "D": "55°"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Angles: x, 2x, 3x, 5x. Find 5x.", "options": {"A": "150°", "B": "180°", "C": "200°", "D": "220°"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "Angles: 110°, x, 2x, 3x. Find third largest angle.", "options": {"A": "110°", "B": "120°", "C": "130°", "D": "140°"}, "correct_answer": "D"}

  ]
}