{
  "title": "Meaning of Boundary - Grade 3 CBSE",
  "total_questions": 100,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "What do we call the total length around a shape?", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Boundary"}, "correct_answer": "B"},
    {"id": 2, "difficulty": "easy", "question": "If you walk around your classroom, what are you measuring?", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Weight"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "What is the boundary of a circle called?", "options": {"A": "Diameter", "B": "Radius", "C": "Circumference", "D": "Chord"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "To put a fence around a garden, you need to know its:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Weight"}, "correct_answer": "B"},
    {"id": 5, "difficulty": "easy", "question": "The outline or edge of any shape is called its:", "options": {"A": "Area", "B": "Boundary", "C": "Volume", "D": "Center"}, "correct_answer": "B"},
    {"id": 6, "difficulty": "easy", "question": "If you want to put tape around a picture frame, you measure its:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Weight"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "The distance around a shape is called:", "options": {"A": "Boundary length", "B": "Perimeter", "C": "Both A and B", "D": "Area"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "To find how much ribbon you need to go around a box, you calculate:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Density"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "The border of a country on a map shows its:", "options": {"A": "Area", "B": "Boundary", "C": "Volume", "D": "Population"}, "correct_answer": "B"},
    {"id": 10, "difficulty": "easy", "question": "When you run around a football field, you cover its:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Surface"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "The line that separates your notebook page from the margin is a:", "options": {"A": "Boundary", "B": "Area", "C": "Volume", "D": "Line"}, "correct_answer": "A"},
    {"id": 12, "difficulty": "easy", "question": "To put lights around a Christmas tree, you need to know its:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Height"}, "correct_answer": "B"},
    {"id": 13, "difficulty": "easy", "question": "The edge of a swimming pool is its:", "options": {"A": "Area", "B": "Boundary", "C": "Volume", "D": "Depth"}, "correct_answer": "B"},
    {"id": 14, "difficulty": "easy", "question": "If you want to build a wall around your house, you measure:", "options": {"A": "Area of house", "B": "Perimeter of land", "C": "Volume of house", "D": "Height of house"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "The total length of all sides of a polygon is its:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Boundary"}, "correct_answer": "B"},
    {"id": 16, "difficulty": "easy", "question": "When you draw a shape, the line you draw is its:", "options": {"A": "Area", "B": "Boundary", "C": "Volume", "D": "Interior"}, "correct_answer": "B"},
    {"id": 17, "difficulty": "easy", "question": "To find how much wire needed to fence a field, calculate:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Weight"}, "correct_answer": "B"},
    {"id": 18, "difficulty": "easy", "question": "The outline of your shadow is its:", "options": {"A": "Area", "B": "Boundary", "C": "Volume", "D": "Length"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "If you want to put a border around a photo, you need its:", "options": {"A": "Area", "B": "Perimeter", "C": "Volume", "D": "Diagonal"}, "correct_answer": "B"},
    {"id": 20, "difficulty": "easy", "question": "The distance around a circular track is its:", "options": {"A": "Diameter", "B": "Radius", "C": "Circumference", "D": "Area"}, "correct_answer": "C"},
    {"id": 21, "difficulty": "medium", "question": "A farmer wants to fence his rectangular field 60m × 40m. What length of fencing needed?", "options": {"A": "180 m", "B": "190 m", "C": "200 m", "D": "210 m"}, "correct_answer": "C"},
    {"id": 22, "difficulty": "medium", "question": "The boundary of a square park is 400m. What is length of each side?", "options": {"A": "95 m", "B": "100 m", "C": "105 m", "D": "110 m"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "A triangular garden has sides 15m, 20m, 25m. What is length of its boundary?", "options": {"A": "55 m", "B": "58 m", "C": "60 m", "D": "62 m"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "If boundary of a rectangle is 48cm and length is 15cm, what is width?", "options": {"A": "7 cm", "B": "8 cm", "C": "9 cm", "D": "10 cm"}, "correct_answer": "C"},
    {"id": 25, "difficulty": "medium", "question": "A regular hexagon has side 8cm. What is its boundary length?", "options": {"A": "44 cm", "B": "46 cm", "C": "48 cm", "D": "50 cm"}, "correct_answer": "C"},
    {"id": 26, "difficulty": "medium", "question": "Boundary of a square is 56cm. What is area?", "options": {"A": "184 sq cm", "B": "190 sq cm", "C": "196 sq cm", "D": "200 sq cm"}, "correct_answer": "C"},
    {"id": 27, "difficulty": "medium", "question": "A pentagon has sides 7cm, 8cm, 9cm, 10cm, 11cm. Boundary length?", "options": {"A": "43 cm", "B": "44 cm", "C": "45 cm", "D": "46 cm"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "Rectangle boundary 70cm. Width 12cm. What is length?", "options": {"A": "21 cm", "B": "22 cm", "C": "23 cm", "D": "24 cm"}, "correct_answer": "C"},
    {"id": 29, "difficulty": "medium", "question": "Regular octagon side 6cm. Boundary length?", "options": {"A": "46 cm", "B": "47 cm", "C": "48 cm", "D": "49 cm"}, "correct_answer": "C"},
    {"id": 30, "difficulty": "medium", "question": "Boundary of equilateral triangle is 45cm. Each side?", "options": {"A": "13 cm", "B": "14 cm", "C": "15 cm", "D": "16 cm"}, "correct_answer": "C"},
    {"id": 31, "difficulty": "medium", "question": "A field boundary is 180m. If it's square, side length?", "options": {"A": "42 m", "B": "43 m", "C": "44 m", "D": "45 m"}, "correct_answer": "D"},
    {"id": 32, "difficulty": "medium", "question": "Rectangle boundary 84cm. Length 25cm. Width?", "options": {"A": "15 cm", "B": "16 cm", "C": "17 cm", "D": "18 cm"}, "correct_answer": "C"},
    {"id": 33, "difficulty": "medium", "question": "Regular heptagon side 9cm. Boundary?", "options": {"A": "61 cm", "B": "62 cm", "C": "63 cm", "D": "64 cm"}, "correct_answer": "C"},
    {"id": 34, "difficulty": "medium", "question": "Boundary of rhombus is 52cm. Each side?", "options": {"A": "12 cm", "B": "13 cm", "C": "14 cm", "D": "15 cm"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "A park boundary 240m. If rectangular 70m long, width?", "options": {"A": "48 m", "B": "49 m", "C": "50 m", "D": "51 m"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "Regular nonagon side 7cm. Boundary length?", "options": {"A": "61 cm", "B": "62 cm", "C": "63 cm", "D": "64 cm"}, "correct_answer": "C"},
    {"id": 37, "difficulty": "medium", "question": "Boundary of parallelogram 58cm. Two sides 15cm each. Other sides?", "options": {"A": "13 cm", "B": "14 cm", "C": "15 cm", "D": "16 cm"}, "correct_answer": "B"},
    {"id": 38, "difficulty": "medium", "question": "Square boundary 92cm. Side?", "options": {"A": "22 cm", "B": "23 cm", "C": "24 cm", "D": "25 cm"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "Regular decagon side 8cm. Boundary?", "options": {"A": "78 cm", "B": "79 cm", "C": "80 cm", "D": "81 cm"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "Triangle boundary 54cm. Two sides 18cm, 20cm. Third side?", "options": {"A": "15 cm", "B": "16 cm", "C": "17 cm", "D": "18 cm"}, "correct_answer": "B"},
    {"id": 41, "difficulty": "medium", "question": "A garden boundary 110m. If square, area?", "options": {"A": "750 sq m", "B": "756.25 sq m", "C": "760 sq m", "D": "765 sq m"}, "correct_answer": "B"},
    {"id": 42, "difficulty": "medium", "question": "Rectangle boundary 96cm. Width 18cm. Length?", "options": {"A": "28 cm", "B": "29 cm", "C": "30 cm", "D": "31 cm"}, "correct_answer": "C"},
    {"id": 43, "difficulty": "medium", "question": "Regular polygon 12 sides, each 5cm. Boundary?", "options": {"A": "58 cm", "B": "59 cm", "C": "60 cm", "D": "61 cm"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "medium", "question": "Boundary of isosceles triangle 65cm. Equal sides 20cm each. Base?", "options": {"A": "23 cm", "B": "24 cm", "C": "25 cm", "D": "26 cm"}, "correct_answer": "C"},
    {"id": 45, "difficulty": "medium", "question": "A field boundary 300m. Rectangular, length 85m. Width?", "options": {"A": "63 m", "B": "64 m", "C": "65 m", "D": "66 m"}, "correct_answer": "C"},
    {"id": 46, "difficulty": "medium", "question": "Regular octagon boundary 64cm. Each side?", "options": {"A": "7 cm", "B": "8 cm", "C": "9 cm", "D": "10 cm"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "medium", "question": "Boundary of trapezium 48cm. Sides 12cm, 10cm, 8cm. Fourth side?", "options": {"A": "16 cm", "B": "17 cm", "C": "18 cm", "D": "19 cm"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "medium", "question": "Square boundary 108cm. Area?", "options": {"A": "729 sq cm", "B": "730 sq cm", "C": "731 sq cm", "D": "732 sq cm"}, "correct_answer": "A"},
    {"id": 49, "difficulty": "medium", "question": "Regular pentagon boundary 75cm. Each side?", "options": {"A": "14 cm", "B": "15 cm", "C": "16 cm", "D": "17 cm"}, "correct_answer": "B"},
    {"id": 50, "difficulty": "medium", "question": "Triangle boundary 72cm. Sides ratio 3:4:5. Longest side?", "options": {"A": "28 cm", "B": "29 cm", "C": "30 cm", "D": "31 cm"}, "correct_answer": "C"},
    {"id": 51, "difficulty": "medium", "question": "A playground boundary 180m. Square, side?", "options": {"A": "43 m", "B": "44 m", "C": "45 m", "D": "46 m"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "medium", "question": "Rectangle boundary 124cm. Length 35cm. Width?", "options": {"A": "25 cm", "B": "26 cm", "C": "27 cm", "D": "28 cm"}, "correct_answer": "C"},
    {"id": 53, "difficulty": "medium", "question": "Regular hexagon boundary 78cm. Each side?", "options": {"A": "12 cm", "B": "13 cm", "C": "14 cm", "D": "15 cm"}, "correct_answer": "B"},
    {"id": 54, "difficulty": "medium", "question": "Boundary of rhombus 68cm. Each side?", "options": {"A": "16 cm", "B": "17 cm", "C": "18 cm", "D": "19 cm"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "medium", "question": "A park boundary 200m. Rectangular, width 45m. Length?", "options": {"A": "53 m", "B": "54 m", "C": "55 m", "D": "56 m"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "medium", "question": "Regular nonagon boundary 81cm. Each side?", "options": {"A": "8 cm", "B": "9 cm", "C": "10 cm", "D": "11 cm"}, "correct_answer": "B"},
    {"id": 57, "difficulty": "medium", "question": "Boundary of parallelogram 86cm. Two sides 22cm each. Other sides?", "options": {"A": "20 cm", "B": "21 cm", "C": "22 cm", "D": "23 cm"}, "correct_answer": "B"},
    {"id": 58, "difficulty": "medium", "question": "Square boundary 116cm. Side?", "options": {"A": "28 cm", "B": "29 cm", "C": "30 cm", "D": "31 cm"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "medium", "question": "Regular decagon boundary 90cm. Each side?", "options": {"A": "8 cm", "B": "9 cm", "C": "10 cm", "D": "11 cm"}, "correct_answer": "B"},
    {"id": 60, "difficulty": "medium", "question": "Triangle boundary 84cm. Sides 28cm, 30cm. Third side?", "options": {"A": "24 cm", "B": "25 cm", "C": "26 cm", "D": "27 cm"}, "correct_answer": "C"},
    {"id": 61, "difficulty": "hard", "question": "A circular track has circumference 440m. What is its radius? (π=22/7)", "options": {"A": "68 m", "B": "69 m", "C": "70 m", "D": "71 m"}, "correct_answer": "C"},
    {"id": 62, "difficulty": "hard", "question": "Boundary of regular 15-gon is 120cm. Each side?", "options": {"A": "7 cm", "B": "8 cm", "C": "9 cm", "D": "10 cm"}, "correct_answer": "B"},
    {"id": 63, "difficulty": "hard", "question": "Rectangle boundary 150cm. Length is twice width. Area?", "options": {"A": "1250 sq cm", "B": "1200 sq cm", "C": "1150 sq cm", "D": "1100 sq cm"}, "correct_answer": "A"},
    {"id": 64, "difficulty": "hard", "question": "Regular polygon with 18 sides, boundary 144cm. Each side?", "options": {"A": "7 cm", "B": "8 cm", "C": "9 cm", "D": "10 cm"}, "correct_answer": "B"},
    {"id": 65, "difficulty": "hard", "question": "A wheel covers 66m in 100 revolutions. What is its radius? (π=22/7)", "options": {"A": "0.105 m", "B": "0.115 m", "C": "0.125 m", "D": "0.135 m"}, "correct_answer": "A"},
    {"id": 66, "difficulty": "hard", "question": "Boundary of regular 24-gon is 168cm. Each side?", "options": {"A": "6 cm", "B": "7 cm", "C": "8 cm", "D": "9 cm"}, "correct_answer": "B"},
    {"id": 67, "difficulty": "hard", "question": "Square and equilateral triangle have same boundary. Square side 15cm. Triangle area? (√3=1.73)", "options": {"A": "95 sq cm", "B": "96 sq cm", "C": "97 sq cm", "D": "98 sq cm"}, "correct_answer": "C"},
    {"id": 68, "difficulty": "hard", "question": "Regular polygon with 30 sides, boundary 180cm. Each side?", "options": {"A": "5 cm", "B": "6 cm", "C": "7 cm", "D": "8 cm"}, "correct_answer": "B"},
    {"id": 69, "difficulty": "hard", "question": "A circular garden has circumference 88m. What is its area? (π=22/7)", "options": {"A": "616 sq m", "B": "617 sq m", "C": "618 sq m", "D": "619 sq m"}, "correct_answer": "A"},
    {"id": 70, "difficulty": "hard", "question": "Boundary of regular 36-gon is 216cm. Each side?", "options": {"A": "5 cm", "B": "6 cm", "C": "7 cm", "D": "8 cm"}, "correct_answer": "B"},
    {"id": 71, "difficulty": "hard", "question": "Rectangle boundary 200cm. Length 3cm more than twice width. Area?", "options": {"A": "2475 sq cm", "B": "2476 sq cm", "C": "2477 sq cm", "D": "2478 sq cm"}, "correct_answer": "B"},
    {"id": 72, "difficulty": "hard", "question": "Regular polygon with 42 sides, boundary 210cm. Each side?", "options": {"A": "4 cm", "B": "5 cm", "C": "6 cm", "D": "7 cm"}, "correct_answer": "B"},
    {"id": 73, "difficulty": "hard", "question": "A wire bent into square of side 14cm. If bent into circle, radius? (π=22/7)", "options": {"A": "8 cm", "B": "9 cm", "C": "10 cm", "D": "11 cm"}, "correct_answer": "B"},
    {"id": 74, "difficulty": "hard", "question": "Boundary of regular 48-gon is 240cm. Each side?", "options": {"A": "4 cm", "B": "5 cm", "C": "6 cm", "D": "7 cm"}, "correct_answer": "B"},
    {"id": 75, "difficulty": "hard", "question": "Square and regular hexagon have same boundary. Square area 256 sq cm. Hexagon side?", "options": {"A": "10 cm", "B": "11 cm", "C": "12 cm", "D": "13 cm"}, "correct_answer": "B"},
    {"id": 76, "difficulty": "hard", "question": "Regular polygon with 54 sides, boundary 270cm. Each side?", "options": {"A": "4 cm", "B": "5 cm", "C": "6 cm", "D": "7 cm"}, "correct_answer": "B"},
    {"id": 77, "difficulty": "hard", "question": "A circular path has circumference 132m. What is diameter? (π=22/7)", "options": {"A": "40 m", "B": "41 m", "C": "42 m", "D": "43 m"}, "correct_answer": "C"},
    {"id": 78, "difficulty": "hard", "question": "Boundary of regular 60-gon is 300cm. Each side?", "options": {"A": "4 cm", "B": "5 cm", "C": "6 cm", "D": "7 cm"}, "correct_answer": "B"},
    {"id": 79, "difficulty": "hard", "question": "Rectangle boundary 180cm. Length and width differ by 10cm. Area?", "options": {"A": "2000 sq cm", "B": "2010 sq cm", "C": "2020 sq cm", "D": "2030 sq cm"}, "correct_answer": "A"},
    {"id": 80, "difficulty": "hard", "question": "Regular polygon with 72 sides, boundary 360cm. Each side?", "options": {"A": "4 cm", "B": "5 cm", "C": "6 cm", "D": "7 cm"}, "correct_answer": "B"}
  ]
}