{
  "title": "Quadrilaterals Properties - Grade 5 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "How many sides does a quadrilateral have? 🔲",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "A quadrilateral with all sides equal is a ____. ⬜",
      "options": {
        "A": "Rectangle",
        "B": "Square",
        "C": "Trapezium",
        "D": "Kite"
      },
      "correct_answer": "B"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "The sum of interior angles of a quadrilateral is ____. 📐",
      "options": { "A": "180°", "B": "270°", "C": "360°", "D": "450°" },
      "correct_answer": "C"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "A quadrilateral with only one pair of parallel sides is a ____. ↔️",
      "options": {
        "A": "Parallelogram",
        "B": "Rectangle",
        "C": "Trapezium",
        "D": "Rhombus"
      },
      "correct_answer": "C"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "All angles in a rectangle are ____. 📐",
      "options": {
        "A": "Acute",
        "B": "Obtuse",
        "C": "Right angles",
        "D": "Different"
      },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "A parallelogram with all sides equal is a ____. 🔷",
      "options": {
        "A": "Rectangle",
        "B": "Square",
        "C": "Rhombus",
        "D": "Trapezium"
      },
      "correct_answer": "C"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "In a parallelogram, opposite sides are ____. ↔️",
      "options": {
        "A": "Equal",
        "B": "Unequal",
        "C": "Perpendicular",
        "D": "Curved"
      },
      "correct_answer": "A"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "A square has ____ lines of symmetry. ⭐",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "D"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Which quadrilateral has no parallel sides? ❌",
      "options": {
        "A": "Square",
        "B": "Trapezium",
        "C": "Kite",
        "D": "Rectangle"
      },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "How many right angles does a square have? 🔳",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "D"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "In a rectangle, diagonals are ____. ✖️",
      "options": {
        "A": "Equal",
        "B": "Unequal",
        "C": "Perpendicular",
        "D": "Half length"
      },
      "correct_answer": "A"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "A quadrilateral with two pairs of equal adjacent sides is a ____. 🪁",
      "options": {
        "A": "Parallelogram",
        "B": "Rhombus",
        "C": "Kite",
        "D": "Trapezium"
      },
      "correct_answer": "C"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Which has all sides equal and all angles 90°? ⬜",
      "options": {
        "A": "Rectangle",
        "B": "Rhombus",
        "C": "Square",
        "D": "Parallelogram"
      },
      "correct_answer": "C"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "How many vertices does a quadrilateral have? 🔲",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "In a parallelogram, opposite angles are ____. ⚖️",
      "options": {
        "A": "Complementary",
        "B": "Supplementary",
        "C": "Equal",
        "D": "Different"
      },
      "correct_answer": "C"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "A trapezium has ____ pair(s) of parallel sides. ↔️",
      "options": { "A": "0", "B": "1", "C": "2", "D": "3" },
      "correct_answer": "B"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "Which quadrilateral is also a parallelogram? 🔄",
      "options": {
        "A": "Trapezium",
        "B": "Kite",
        "C": "Rectangle",
        "D": "None"
      },
      "correct_answer": "C"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "All squares are rectangles. True or False? 🤔",
      "options": { "A": "True", "B": "False", "C": "Sometimes", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "A rhombus with one right angle becomes a ____. 🔲",
      "options": {
        "A": "Rectangle",
        "B": "Square",
        "C": "Trapezium",
        "D": "Kite"
      },
      "correct_answer": "B"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "How many diagonals does a quadrilateral have? ✖️",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "B"
    },
    {
      "id": 21,
      "difficulty": "medium",
      "question": "If three angles of a quadrilateral are 80°, 90°, 100°, the fourth angle is ____. 📐",
      "options": { "A": "70°", "B": "80°", "C": "90°", "D": "100°" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "In a parallelogram, adjacent angles are ____. ↔️",
      "options": {
        "A": "Equal",
        "B": "Complementary",
        "C": "Supplementary",
        "D": "Right"
      },
      "correct_answer": "C"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "The diagonals of a rhombus bisect each other at ____ angles. 📐",
      "options": { "A": "Acute", "B": "Right", "C": "Obtuse", "D": "Straight" },
      "correct_answer": "B"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "A quadrilateral with all sides equal but angles not 90° is a ____. 🔷",
      "options": {
        "A": "Square",
        "B": "Rectangle",
        "C": "Rhombus",
        "D": "Trapezium"
      },
      "correct_answer": "C"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "If one angle of a parallelogram is 70°, its adjacent angle is ____. 🔍",
      "options": { "A": "70°", "B": "90°", "C": "110°", "D": "140°" },
      "correct_answer": "C"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "In a rectangle, diagonals bisect each other and are ____. ✂️",
      "options": {
        "A": "Equal",
        "B": "Perpendicular",
        "C": "Half length",
        "D": "Parallel"
      },
      "correct_answer": "A"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Which quadrilateral has diagonals that are perpendicular bisectors? ⭐",
      "options": {
        "A": "Rectangle",
        "B": "Parallelogram",
        "C": "Rhombus",
        "D": "Trapezium"
      },
      "correct_answer": "C"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "In an isosceles trapezium, non-parallel sides are ____. ↔️",
      "options": {
        "A": "Equal",
        "B": "Unequal",
        "C": "Parallel",
        "D": "Perpendicular"
      },
      "correct_answer": "A"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "A kite has ____ line(s) of symmetry. 🪁",
      "options": { "A": "0", "B": "1", "C": "2", "D": "4" },
      "correct_answer": "B"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "If diagonals of a quadrilateral are equal and bisect at right angles, it is a ____. ✖️",
      "options": {
        "A": "Rectangle",
        "B": "Square",
        "C": "Rhombus",
        "D": "Kite"
      },
      "correct_answer": "B"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "In a parallelogram ABCD, if ∠A = 65°, then ∠C = ____. 🔍",
      "options": { "A": "65°", "B": "115°", "C": "25°", "D": "90°" },
      "correct_answer": "A"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "Which is NOT true for a rectangle? ❌",
      "options": {
        "A": "Opposite sides equal",
        "B": "All angles 90°",
        "C": "Diagonals perpendicular",
        "D": "Diagonals equal"
      },
      "correct_answer": "C"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "A quadrilateral with diagonals equal but not perpendicular could be a ____. ⚖️",
      "options": {
        "A": "Square",
        "B": "Rhombus",
        "C": "Rectangle",
        "D": "Kite"
      },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "In a rhombus, if one diagonal is equal to a side, all angles are ____. 🔷",
      "options": { "A": "45°", "B": "60°", "C": "90°", "D": "120°" },
      "correct_answer": "B"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "The angles of a quadrilateral are in ratio 1:2:3:4. The largest angle is ____. 📊",
      "options": { "A": "144°", "B": "120°", "C": "100°", "D": "90°" },
      "correct_answer": "A"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Which quadrilateral always has congruent diagonals? ↔️",
      "options": {
        "A": "Parallelogram",
        "B": "Rhombus",
        "C": "Rectangle",
        "D": "Kite"
      },
      "correct_answer": "C"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "In a kite, one pair of opposite angles are ____. 🪁",
      "options": {
        "A": "Equal",
        "B": "Supplementary",
        "C": "Complementary",
        "D": "Right"
      },
      "correct_answer": "A"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "A parallelogram with perpendicular diagonals is a ____. 📐",
      "options": {
        "A": "Rectangle",
        "B": "Rhombus",
        "C": "Square",
        "D": "Kite"
      },
      "correct_answer": "B"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "If one angle of a cyclic quadrilateral is 70°, the opposite angle is ____. 🔄",
      "options": { "A": "70°", "B": "90°", "C": "110°", "D": "180°" },
      "correct_answer": "C"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "Which has both pairs of opposite sides parallel? ↔️↔️",
      "options": {
        "A": "Trapezium",
        "B": "Kite",
        "C": "Parallelogram",
        "D": "None"
      },
      "correct_answer": "C"
    },
    {
      "id": 41,
      "difficulty": "hard",
      "question": "In quadrilateral ABCD, ∠A:∠B:∠C:∠D = 2:3:4:5. ∠D = ____. 📐",
      "options": {
        "A": "120°",
        "B": "125°",
        "C": "900/7°",
        "D": "135°"
      },
      "correct_answer": "C"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "The diagonals of a rhombus are 16 cm and 12 cm. Its side length is ____. 📏",
      "options": { "A": "10 cm", "B": "12 cm", "C": "14 cm", "D": "20 cm" },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "In a parallelogram, diagonals are 10 cm and 14 cm. They bisect at 60°. Area ≈ ____ cm². 🔍",
      "options": {
        "A": "35√3",
        "B": "40√3",
        "C": "50√3",
        "D": "60√3"
      },
      "correct_answer": "A"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "In a cyclic quadrilateral, opposite angles sum to ____. 🔄",
      "options": { "A": "90°", "B": "180°", "C": "270°", "D": "360°" },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "A quadrilateral with vertices (0,0), (4,0), (4,3), (0,3) is a ____. 📊",
      "options": {
        "A": "Square",
        "B": "Rectangle",
        "C": "Rhombus",
        "D": "Trapezium"
      },
      "correct_answer": "B"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "In rectangle ABCD, AB=8cm, BC=6cm. Diagonal AC = ____ cm. 📐",
      "options": { "A": "8", "B": "10", "C": "12", "D": "14" },
      "correct_answer": "B"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "If angles of quadrilateral are (x+10)°, (2x+20)°, (3x+30)°, (4x+40)°, find smallest angle. 🔍",
      "options": {
        "A": "30°",
        "B": "36°",
        "C": "40°",
        "D": "50°"
      },
      "correct_answer": "B"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "In rhombus, diagonals are in ratio 3:4. Perimeter=40cm. Longer diagonal=____ cm. 📏",
      "options": { "A": "12", "B": "16", "C": "20", "D": "24" },
      "correct_answer": "B"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "A parallelogram becomes a rectangle when ____. 🔲",
      "options": {
        "A": "Diagonals equal",
        "B": "Diagonals perpendicular",
        "C": "One angle 90°",
        "D": "All sides equal"
      },
      "correct_answer": "C"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "In trapezium, parallel sides are 10cm, 6cm. Distance=4cm. Area=____ cm². 📐",
      "options": { "A": "24", "B": "32", "C": "40", "D": "48" },
      "correct_answer": "B"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "Quadrilateral with vertices (1,1), (4,1), (3,4), (2,4) is a ____. 📊",
      "options": {
        "A": "Square",
        "B": "Rectangle",
        "C": "Parallelogram",
        "D": "Trapezium"
      },
      "correct_answer": "D"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "In kite, diagonals are 8cm, 15cm. Area=____ cm². 🪁",
      "options": { "A": "30", "B": "40", "C": "50", "D": "60" },
      "correct_answer": "D"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "If one diagonal of rhombus equals side, angles are ____ and ____. 🔷",
      "options": {
        "A": "60°,120°",
        "B": "45°,135°",
        "C": "30°,150°",
        "D": "90°,90°"
      },
      "correct_answer": "A"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "In cyclic quadrilateral ABCD, ∠A=80°, ∠B=95°, ∠C=____. 🔄",
      "options": { "A": "80°", "B": "85°", "C": "95°", "D": "100°" },
      "correct_answer": "D"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "Rectangle has perimeter 28cm, length 8cm. Area=____ cm². 📏",
      "options": { "A": "24", "B": "32", "C": "40", "D": "48" },
      "correct_answer": "D"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "Parallelogram with base 12cm, height 5cm, area=____ cm². 📐",
      "options": { "A": "30", "B": "50", "C": "60", "D": "72" },
      "correct_answer": "C"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "Square and rhombus have same perimeter. Which has larger area? ⚖️",
      "options": {
        "A": "Square",
        "B": "Rhombus",
        "C": "Equal",
        "D": "Cannot say"
      },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "In quadrilateral, sum of three angles is 290°. Fourth angle=____. 📐",
      "options": { "A": "50°", "B": "60°", "C": "70°", "D": "80°" },
      "correct_answer": "C"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "Diagonals of rectangle are 2x+3 and 3x-7. Find x. 🔍",
      "options": { "A": "5", "B": "8", "C": "10", "D": "12" },
      "correct_answer": "C"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "In parallelogram, if one angle is 5x and adjacent is 3x+40, find angles. 🔍",
      "options": {
        "A": "85°,95°",
        "B": "87.5°,92.5°",
        "C": "80°,100°",
        "D": "75°,105°"
      },
      "correct_answer": "B"
    }
  ]
}