{
  "title": "3D Shapes & Nets - Grade 5 ICSE",
  "total_questions": 100,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "Which 3D shape has 6 square faces? 🧊",
      "options": { "A": "Cylinder", "B": "Cube", "C": "Sphere", "D": "Cone" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "Which net can be folded to make a cube? 🔲",
      "options": {
        "A": "Net of a Cylinder",
        "B": "Net of a Sphere",
        "C": "Net of a Cube",
        "D": "Net of a Cone"
      },
      "correct_answer": "C"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "A pyramid has a ________ base. 🏔️",
      "options": {
        "A": "Round",
        "B": "Curved",
        "C": "Square or Triangle",
        "D": "No base"
      },
      "correct_answer": "C"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "How many faces does a cuboid have? 📦",
      "options": { "A": "4", "B": "5", "C": "6", "D": "8" },
      "correct_answer": "C"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "A cylinder has ______ flat faces. 🥫",
      "options": { "A": "0", "B": "1", "C": "2", "D": "3" },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "Which shape is completely round? ⚽",
      "options": { "A": "Cube", "B": "Pyramid", "C": "Sphere", "D": "Cuboid" },
      "correct_answer": "C"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Which net would make a triangular prism? 🔺",
      "options": {
        "A": "Net with two triangles",
        "B": "Net with one circle",
        "C": "Net with a square only",
        "D": "Net with a pentagon"
      },
      "correct_answer": "A"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "A cone has ____ vertex (corner point). 🎯",
      "options": { "A": "0", "B": "1", "C": "2", "D": "4" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Which 3D shape looks like a party hat? 🎉",
      "options": { "A": "Cylinder", "B": "Cube", "C": "Cone", "D": "Sphere" },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "How many edges does a cube have? ⬜",
      "options": { "A": "6", "B": "8", "C": "12", "D": "4" },
      "correct_answer": "C"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "Which shape can roll? 🌀",
      "options": { "A": "Cube", "B": "Sphere", "C": "Pyramid", "D": "Cuboid" },
      "correct_answer": "B"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "A rectangular prism is also called a _____. 🧱",
      "options": { "A": "Sphere", "B": "Cone", "C": "Cuboid", "D": "Cylinder" },
      "correct_answer": "C"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Which is NOT a 3D shape? ❌",
      "options": { "A": "Square", "B": "Cube", "C": "Cone", "D": "Sphere" },
      "correct_answer": "A"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "A triangular pyramid is also called a _______. 🔺",
      "options": {
        "A": "Cube",
        "B": "Tetrahedron",
        "C": "Cuboid",
        "D": "Prism"
      },
      "correct_answer": "B"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "How many vertices does a cuboid have? 📐",
      "options": { "A": "6", "B": "8", "C": "10", "D": "12" },
      "correct_answer": "B"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Which shape has a curved surface and no edges? 🔄",
      "options": {
        "A": "Cylinder",
        "B": "Cube",
        "C": "Sphere",
        "D": "Pyramid"
      },
      "correct_answer": "C"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "Which net has circles? ⭕",
      "options": {
        "A": "Net of a Cube",
        "B": "Net of a Cylinder",
        "C": "Net of a Cuboid",
        "D": "Net of a Pyramid"
      },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "A square pyramid has a square base and ______ faces. 🔳",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "C"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "Which 3D shape is like a can of juice? 🥤",
      "options": { "A": "Cone", "B": "Sphere", "C": "Cylinder", "D": "Cube" },
      "correct_answer": "C"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "True or False: A cube and a cuboid have the same number of faces. 🤔",
      "options": {
        "A": "True",
        "B": "False",
        "C": "Only sometimes",
        "D": "Cannot say"
      },
      "correct_answer": "A"
    },
    {
      "id": 21,
      "difficulty": "medium",
      "question": "Which net below will NOT form a closed cube? ❌",
      "options": {
        "A": "A net with 6 squares",
        "B": "A net with 4 squares in a row",
        "C": "A net with 5 squares",
        "D": "A net with a cross of 6 squares"
      },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "How many rectangles are in the net of a cuboid? 📦",
      "options": { "A": "4", "B": "5", "C": "6", "D": "8" },
      "correct_answer": "C"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "If a pyramid has a hexagonal base, how many faces does it have? 🔶",
      "options": { "A": "6", "B": "7", "C": "8", "D": "9" },
      "correct_answer": "B"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "A cylinder has ______ edges. 🥫",
      "options": { "A": "0", "B": "2", "C": "1", "D": "3" },
      "correct_answer": "B"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Which shape has more vertices: Cube or Square Pyramid? ⚖️",
      "options": {
        "A": "Cube",
        "B": "Square Pyramid",
        "C": "Both are equal",
        "D": "Cannot compare"
      },
      "correct_answer": "A"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "A triangular prism has how many faces? 🔺",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Which 3D shape has all faces that are triangles? 🔺🔺",
      "options": {
        "A": "Triangular Prism",
        "B": "Triangular Pyramid",
        "C": "Cube",
        "D": "Cylinder"
      },
      "correct_answer": "B"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "How many pairs of parallel faces does a cube have? ⏹️",
      "options": { "A": "2", "B": "3", "C": "4", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "Which net can form a cone? 🍦",
      "options": {
        "A": "A semicircle",
        "B": "A circle and a rectangle",
        "C": "A sector of a circle",
        "D": "Two triangles"
      },
      "correct_answer": "C"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "A pentagonal prism has how many edges? 🔷",
      "options": { "A": "10", "B": "15", "C": "12", "D": "18" },
      "correct_answer": "B"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "Which shape has exactly 5 vertices? 🔺",
      "options": {
        "A": "Square Pyramid",
        "B": "Triangular Prism",
        "C": "Cuboid",
        "D": "Cylinder"
      },
      "correct_answer": "A"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "True or False: Every face of a cuboid is a rectangle. 📦",
      "options": {
        "A": "True",
        "B": "False",
        "C": "Only for some cuboids",
        "D": "Not sure"
      },
      "correct_answer": "A"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "How many lateral (side) faces does a square pyramid have? 🗻",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "Which 3D shape has no flat surfaces? 🌐",
      "options": {
        "A": "Cone",
        "B": "Cylinder",
        "C": "Sphere",
        "D": "Pyramid"
      },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "A net of a 3D shape shows all its faces laid out ____. 📜",
      "options": { "A": "Stacked", "B": "Flat", "C": "Curved", "D": "Rotated" },
      "correct_answer": "B"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Which shape has more edges: Triangular Prism or Triangular Pyramid? 🔺⚖️",
      "options": {
        "A": "Triangular Prism",
        "B": "Triangular Pyramid",
        "C": "Both equal",
        "D": "Depends on size"
      },
      "correct_answer": "A"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "A cube is a special type of cuboid where all sides are ____. ⬜",
      "options": {
        "A": "Rectangular",
        "B": "Equal",
        "C": "Different",
        "D": "Round"
      },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "Which shape's net will always include triangles? 🔺",
      "options": {
        "A": "Cube",
        "B": "Cylinder",
        "C": "Pyramid",
        "D": "Sphere"
      },
      "correct_answer": "C"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "How many faces meet at each vertex of a cube? 🔳",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "B"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "Which is the odd one out based on faces? 🤨",
      "options": {
        "A": "Cube",
        "B": "Cuboid",
        "C": "Cone",
        "D": "Triangular Prism"
      },
      "correct_answer": "C"
    },
    {
      "id": 41,
      "difficulty": "hard",
      "question": "A hexagonal pyramid has a base with 6 sides. How many edges does it have? 🔶",
      "options": { "A": "12", "B": "18", "C": "10", "D": "15" },
      "correct_answer": "A"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "How many different nets are possible for a cube? 🤯",
      "options": { "A": "6", "B": "8", "C": "10", "D": "11" },
      "correct_answer": "D"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "A prism has 15 edges. What shape is its base? 📏",
      "options": {
        "A": "Pentagon",
        "B": "Hexagon",
        "C": "Triangle",
        "D": "Square"
      },
      "correct_answer": "A"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "If a 3D shape has 7 faces and 15 edges, how many vertices does it have? (Euler's formula: F + V = E + 2) 🧮",
      "options": { "A": "8", "B": "9", "C": "10", "D": "11" },
      "correct_answer": "C"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "Which shape has exactly 9 edges? 📐",
      "options": {
        "A": "Triangular Prism",
        "B": "Square Pyramid",
        "C": "Triangular Pyramid",
        "D": "Pentagonal Pyramid"
      },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "A cylinder is NOT a polyhedron because it has ____ surfaces. 🔄",
      "options": { "A": "Flat", "B": "Curved", "C": "Many", "D": "Triangular" },
      "correct_answer": "B"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Which net will form an open cylinder (like a pipe)? 🚰",
      "options": {
        "A": "A rectangle only",
        "B": "Two circles and a rectangle",
        "C": "One circle and a rectangle",
        "D": "A sector of a circle"
      },
      "correct_answer": "A"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "An octagonal prism has how many faces? 🛑",
      "options": { "A": "8", "B": "10", "C": "12", "D": "14" },
      "correct_answer": "B"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "True or False: A cone has 2 faces (one flat and one curved). 🍦",
      "options": {
        "A": "True",
        "B": "False",
        "C": "Only for some cones",
        "D": "It has 1 face"
      },
      "correct_answer": "A"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "Which shape has the same number of faces as a square pyramid? ⚖️",
      "options": {
        "A": "Triangular Prism",
        "B": "Cube",
        "C": "Triangular Pyramid",
        "D": "Cuboid"
      },
      "correct_answer": "A"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "If you cut a cube along its edges to make a net, what is the maximum number of squares that can be attached in a single row? 🔳",
      "options": { "A": "4", "B": "5", "C": "6", "D": "3" },
      "correct_answer": "A"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "A pyramid has 8 edges. What is the shape of its base? 🔺",
      "options": {
        "A": "Triangle",
        "B": "Square",
        "C": "Pentagon",
        "D": "Hexagon"
      },
      "correct_answer": "B"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "Which 3D shape can have a net that is a single rectangle? 📜",
      "options": { "A": "Cylinder", "B": "Cube", "C": "Cone", "D": "Sphere" },
      "correct_answer": "A"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "How many vertices does a hexagonal prism have? 🔶",
      "options": { "A": "10", "B": "12", "C": "14", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "A 3D shape has 5 faces and 5 vertices. What is it? 🔺",
      "options": {
        "A": "Square Pyramid",
        "B": "Triangular Prism",
        "C": "Triangular Pyramid",
        "D": "Pentagon"
      },
      "correct_answer": "A"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "Which is NOT a net of a cuboid? ❌",
      "options": {
        "A": "Net with 6 rectangles",
        "B": "Net with 4 rectangles in a row and 2 squares",
        "C": "Net with all squares",
        "D": "Net with 3 pairs of equal rectangles"
      },
      "correct_answer": "C"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "A pyramid's net always has one polygon and the rest are ____. 🟦",
      "options": {
        "A": "Squares",
        "B": "Circles",
        "C": "Triangles",
        "D": "Rectangles"
      },
      "correct_answer": "C"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "A cube and a square pyramid are joined base to base. How many faces does the new shape have? 🧱",
      "options": { "A": "8", "B": "9", "C": "10", "D": "12" },
      "correct_answer": "B"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "A prism has 18 edges. How many vertices does it have? 📏",
      "options": { "A": "10", "B": "12", "C": "14", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "Which shape has Euler's formula F + V - E = 2 NOT applicable? 🧮",
      "options": {
        "A": "Cube",
        "B": "Sphere",
        "C": "Cuboid",
        "D": "Triangular Pyramid"
      },
      "correct_answer": "B"
    },
    {
      "id": 61,
      "difficulty": "hard",
      "question": "How many pairs of parallel edges does a cuboid have? 📦",
      "options": {
        "A": "6",
        "B": "9",
        "C": "12",
        "D": "18"
      },
      "correct_answer": "D"
    },
    {
      "id": 62,
      "difficulty": "hard",
      "question": "A tetrahedron has how many faces? 🔺",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 63,
      "difficulty": "hard",
      "question": "Which net could be for a triangular prism? 🔺",
      "options": {
        "A": "2 triangles, 3 rectangles",
        "B": "1 hexagon, 6 triangles",
        "C": "2 pentagons, 5 rectangles",
        "D": "1 square, 4 triangles"
      },
      "correct_answer": "A"
    },
    {
      "id": 64,
      "difficulty": "hard",
      "question": "If a pyramid has 10 edges, what is the base polygon? 🔟",
      "options": {
        "A": "Pentagon",
        "B": "Hexagon",
        "C": "Square",
        "D": "Octagon"
      },
      "correct_answer": "A"
    },
    {
      "id": 65,
      "difficulty": "hard",
      "question": "Which shape has exactly 7 faces? 🟦",
      "options": {
        "A": "Hexagonal Pyramid",
        "B": "Pentagonal Prism",
        "C": "Octagonal Pyramid",
        "D": "Heptagonal Prism"
      },
      "correct_answer": "B"
    },
    {
      "id": 66,
      "difficulty": "hard",
      "question": "A cube is painted and cut into smaller cubes. How many faces does a smaller cube at the corner have painted? 🎨",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "C"
    },
    {
      "id": 67,
      "difficulty": "hard",
      "question": "True or False: A cylinder has two edges. 🔄",
      "options": {
        "A": "True",
        "B": "False",
        "C": "It has one edge",
        "D": "It has no edges"
      },
      "correct_answer": "B"
    },
    {
      "id": 68,
      "difficulty": "hard",
      "question": "A shape has 12 edges and all faces are triangles. What is it? 🔺",
      "options": {
        "A": "Triangular Prism",
        "B": "Square Pyramid",
        "C": "Octahedron",
        "D": "Hexagonal Pyramid"
      },
      "correct_answer": "C"
    },
    {
      "id": 69,
      "difficulty": "hard",
      "question": "Which 3D shape's net always contains a circle? ⭕",
      "options": { "A": "Cone", "B": "Cube", "C": "Pyramid", "D": "Prism" },
      "correct_answer": "A"
    },
    {
      "id": 70,
      "difficulty": "hard",
      "question": "A cuboid has dimensions 4cm, 3cm, 2cm. Which net shows the correct face sizes? 📐",
      "options": {
        "A": "Rectangles: 4x3, 4x2, 3x2",
        "B": "All squares",
        "C": "Rectangles: 4x4, 3x3, 2x2",
        "D": "Triangles and rectangles"
      },
      "correct_answer": "A"
    },
    {
      "id": 71,
      "difficulty": "hard",
      "question": "How many faces does a dodecahedron have? 🟦",
      "options": { "A": "10", "B": "12", "C": "14", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 72,
      "difficulty": "hard",
      "question": "A shape with 20 faces is called an ______. 🔳",
      "options": {
        "A": "Icosahedron",
        "B": "Dodecahedron",
        "C": "Octahedron",
        "D": "Tetrahedron"
      },
      "correct_answer": "A"
    },
    {
      "id": 73,
      "difficulty": "hard",
      "question": "Which shape can have a parallelogram as a face? 🔷",
      "options": {
        "A": "Cube",
        "B": "Triangular Prism",
        "C": "Square Pyramid",
        "D": "Cone"
      },
      "correct_answer": "B"
    },
    {
      "id": 74,
      "difficulty": "hard",
      "question": "If a prism has a base with n sides, how many edges does it have? 🔢",
      "options": { "A": "2n", "B": "3n", "C": "n+2", "D": "n x n" },
      "correct_answer": "B"
    },
    {
      "id": 75,
      "difficulty": "hard",
      "question": "A pyramid has a base with 8 sides. How many faces does it have? 🛑",
      "options": { "A": "8", "B": "9", "C": "10", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 76,
      "difficulty": "hard",
      "question": "Which net is impossible for a closed cube? ❌",
      "options": {
        "A": "T-shape of 6 squares",
        "B": "Cross shape of 6 squares",
        "C": "Line of 6 squares",
        "D": "Shape with 5 squares"
      },
      "correct_answer": "C"
    },
    {
      "id": 77,
      "difficulty": "hard",
      "question": "A cylinder's net has two circles and one ______. 🔄",
      "options": {
        "A": "Square",
        "B": "Triangle",
        "C": "Rectangle",
        "D": "Sector"
      },
      "correct_answer": "C"
    },
    {
      "id": 78,
      "difficulty": "hard",
      "question": "A shape with 30 edges and 12 faces is a _______. 📏",
      "options": {
        "A": "Dodecahedron",
        "B": "Icosahedron",
        "C": "Cube",
        "D": "Cylinder"
      },
      "correct_answer": "A"
    },
    {
      "id": 79,
      "difficulty": "hard",
      "question": "Which polyhedron has all faces that are regular pentagons? 🔶",
      "options": {
        "A": "Cube",
        "B": "Dodecahedron",
        "C": "Octahedron",
        "D": "Tetrahedron"
      },
      "correct_answer": "B"
    },
    {
      "id": 80,
      "difficulty": "hard",
      "question": "If F=6, V=8, then E=? (Euler's formula) 🧮",
      "options": { "A": "10", "B": "12", "C": "14", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 81,
      "difficulty": "hard",
      "question": "How many rectangular faces does a pentagonal prism have? 🔷",
      "options": { "A": "5", "B": "6", "C": "7", "D": "10" },
      "correct_answer": "A"
    },
    {
      "id": 82,
      "difficulty": "hard",
      "question": "A shape with 4 faces, all triangles, is a ______. 🔺",
      "options": {
        "A": "Triangular Prism",
        "B": "Square Pyramid",
        "C": "Tetrahedron",
        "D": "Cone"
      },
      "correct_answer": "C"
    },
    {
      "id": 83,
      "difficulty": "hard",
      "question": "Which shape has a net that includes a hexagon? 🔶",
      "options": {
        "A": "Hexagonal Prism",
        "B": "Cube",
        "C": "Cylinder",
        "D": "Cone"
      },
      "correct_answer": "A"
    },
    {
      "id": 84,
      "difficulty": "hard",
      "question": "A cube has a surface area made of ____ squares. ⬜",
      "options": { "A": "4", "B": "5", "C": "6", "D": "8" },
      "correct_answer": "C"
    },
    {
      "id": 85,
      "difficulty": "hard",
      "question": "True or False: A sphere has one face. 🌐",
      "options": {
        "A": "True",
        "B": "False",
        "C": "It has two",
        "D": "It has none"
      },
      "correct_answer": "A"
    },
    {
      "id": 86,
      "difficulty": "hard",
      "question": "How many edges does a cone have? 🍦",
      "options": { "A": "0", "B": "1", "C": "2", "D": "3" },
      "correct_answer": "B"
    },
    {
      "id": 87,
      "difficulty": "hard",
      "question": "A pyramid with a heptagonal base has how many vertices? 🔺",
      "options": { "A": "7", "B": "8", "C": "14", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 88,
      "difficulty": "hard",
      "question": "Which shape's net will have exactly 5 faces, made of 2 triangles and 3 rectangles? 🟦",
      "options": {
        "A": "Square Pyramid",
        "B": "Triangular Prism",
        "C": "Cube",
        "D": "Cylinder"
      },
      "correct_answer": "B"
    },
    {
      "id": 89,
      "difficulty": "hard",
      "question": "A prism always has two bases that are ______. 🔳",
      "options": {
        "A": "Triangles",
        "B": "Congruent polygons",
        "C": "Squares",
        "D": "Circles"
      },
      "correct_answer": "B"
    },
    {
      "id": 90,
      "difficulty": "hard",
      "question": "If a pyramid has 6 faces, what is the base? 🔺",
      "options": {
        "A": "Pentagon",
        "B": "Hexagon",
        "C": "Square",
        "D": "Triangle"
      },
      "correct_answer": "A"
    },
    {
      "id": 91,
      "difficulty": "hard",
      "question": "Which 3D shape has exactly 12 edges and 6 faces? 📏",
      "options": {
        "A": "Cube",
        "B": "Triangular Prism",
        "C": "Square Pyramid",
        "D": "Hexagonal Pyramid"
      },
      "correct_answer": "A"
    },
    {
      "id": 92,
      "difficulty": "hard",
      "question": "A net with 2 pentagons and 5 rectangles forms a _______. 🔷",
      "options": {
        "A": "Pentagonal Prism",
        "B": "Pentagonal Pyramid",
        "C": "Hexagonal Prism",
        "D": "Cube"
      },
      "correct_answer": "A"
    },
    {
      "id": 93,
      "difficulty": "hard",
      "question": "How many faces does a pentahedron have? 🔺",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "B"
    },
    {
      "id": 94,
      "difficulty": "hard",
      "question": "A shape with F=8, V=6, then E=? 🧮",
      "options": { "A": "10", "B": "12", "C": "14", "D": "16" },
      "correct_answer": "B"
    },
    {
      "id": 95,
      "difficulty": "hard",
      "question": "Which is a Platonic solid? 🔳",
      "options": { "A": "Cube", "B": "Cylinder", "C": "Cone", "D": "Sphere" },
      "correct_answer": "A"
    },
    {
      "id": 96,
      "difficulty": "hard",
      "question": "A prism with 10 vertices has a ______ base. 🔷",
      "options": {
        "A": "Pentagon",
        "B": "Hexagon",
        "C": "Square",
        "D": "Triangle"
      },
      "correct_answer": "A"
    },
    {
      "id": 97,
      "difficulty": "hard",
      "question": "How many faces meet at each vertex of an octahedron? 🔺",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 98,
      "difficulty": "hard",
      "question": "Which shape has all edges equal and all angles 90°? ⬜",
      "options": { "A": "Cube", "B": "Cuboid", "C": "Sphere", "D": "Cylinder" },
      "correct_answer": "A"
    },
    {
      "id": 99,
      "difficulty": "hard",
      "question": "A pyramid's lateral faces are always ______. 🔺",
      "options": {
        "A": "Squares",
        "B": "Triangles",
        "C": "Rectangles",
        "D": "Circles"
      },
      "correct_answer": "B"
    },
    {
      "id": 100,
      "difficulty": "hard",
      "question": "Euler's formula works for polyhedra that are ______. 🧮",
      "options": {
        "A": "Flat-faced",
        "B": "Curved",
        "C": "Round",
        "D": "Any shape"
      },
      "correct_answer": "A"
    }
  ]
}