{
  "title": "Perimeter of Rectangle & Square - Grade 4 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "📏 Square side = 5 cm. Perimeter = ?",
      "options": { "A": "15 cm", "B": "20 cm", "C": "25 cm", "D": "30 cm" },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "🟦 Rectangle: length 7 cm, width 3 cm. Perimeter = ?",
      "options": { "A": "17 cm", "B": "18 cm", "C": "19 cm", "D": "20 cm" },
      "correct_answer": "D"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "📐 Square side = 8 m. Perimeter = ?",
      "options": { "A": "24 m", "B": "28 m", "C": "32 m", "D": "36 m" },
      "correct_answer": "C"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "🟨 Rectangle: 6 cm long, 4 cm wide. Perimeter = ?",
      "options": { "A": "18 cm", "B": "20 cm", "C": "22 cm", "D": "24 cm" },
      "correct_answer": "B"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "📏 Square side = 12 cm. Perimeter = ?",
      "options": { "A": "36 cm", "B": "42 cm", "C": "48 cm", "D": "54 cm" },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "🟦 Rectangle: 9 m long, 5 m wide. Perimeter = ?",
      "options": { "A": "26 m", "B": "28 m", "C": "30 m", "D": "32 m" },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "📐 Square side = 15 cm. Perimeter = ?",
      "options": { "A": "45 cm", "B": "50 cm", "C": "55 cm", "D": "60 cm" },
      "correct_answer": "D"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "🟨 Rectangle: 11 cm long, 8 cm wide. Perimeter = ?",
      "options": { "A": "36 cm", "B": "38 cm", "C": "40 cm", "D": "42 cm" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "📏 Square side = 20 m. Perimeter = ?",
      "options": { "A": "60 m", "B": "70 m", "C": "80 m", "D": "90 m" },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "🟦 Rectangle: 14 cm long, 10 cm wide. Perimeter = ?",
      "options": { "A": "44 cm", "B": "46 cm", "C": "48 cm", "D": "50 cm" },
      "correct_answer": "C"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "📐 Square side = 25 cm. Perimeter = ?",
      "options": { "A": "75 cm", "B": "90 cm", "C": "100 cm", "D": "125 cm" },
      "correct_answer": "C"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "🟨 Rectangle: 18 m long, 12 m wide. Perimeter = ?",
      "options": { "A": "54 m", "B": "58 m", "C": "60 m", "D": "64 m" },
      "correct_answer": "C"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "📏 Square side = 30 cm. Perimeter = ?",
      "options": { "A": "90 cm", "B": "100 cm", "C": "110 cm", "D": "120 cm" },
      "correct_answer": "D"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "🟦 Rectangle: 22 cm long, 15 cm wide. Perimeter = ?",
      "options": { "A": "70 cm", "B": "72 cm", "C": "74 cm", "D": "76 cm" },
      "correct_answer": "C"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "📐 Square side = 35 m. Perimeter = ?",
      "options": { "A": "120 m", "B": "130 m", "C": "140 m", "D": "150 m" },
      "correct_answer": "C"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "🟨 Rectangle: 16 cm long, 9 cm wide. Perimeter = ?",
      "options": { "A": "48 cm", "B": "50 cm", "C": "52 cm", "D": "54 cm" },
      "correct_answer": "B"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "📏 Square side = 40 cm. Perimeter = ?",
      "options": { "A": "140 cm", "B": "150 cm", "C": "160 cm", "D": "170 cm" },
      "correct_answer": "C"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "🟦 Rectangle: 24 m long, 18 m wide. Perimeter = ?",
      "options": { "A": "78 m", "B": "82 m", "C": "84 m", "D": "88 m" },
      "correct_answer": "C"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "📐 Square side = 45 cm. Perimeter = ?",
      "options": { "A": "160 cm", "B": "170 cm", "C": "180 cm", "D": "190 cm" },
      "correct_answer": "C"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "🟨 Rectangle: 13 cm long, 7 cm wide. Perimeter = ?",
      "options": { "A": "38 cm", "B": "40 cm", "C": "42 cm", "D": "44 cm" },
      "correct_answer": "B"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "🏠 A room 8m×6m. Perimeter of floor? 🏡",
      "options": { "A": "24 m", "B": "26 m", "C": "28 m", "D": "30 m" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "📏 Square perimeter = 36 cm. Side = ?",
      "options": { "A": "6 cm", "B": "7 cm", "C": "8 cm", "D": "9 cm" },
      "correct_answer": "D"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "🟦 Rectangle perimeter = 40 m, length = 12 m. Width = ?",
      "options": { "A": "6 m", "B": "7 m", "C": "8 m", "D": "9 m" },
      "correct_answer": "C"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "📐 Square perimeter = 64 cm. Area = ?",
      "options": {
        "A": "196 cm²",
        "B": "225 cm²",
        "C": "256 cm²",
        "D": "289 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "🟨 Rectangle: length twice width, perimeter=48 cm. Length = ?",
      "options": { "A": "12 cm", "B": "14 cm", "C": "16 cm", "D": "18 cm" },
      "correct_answer": "C"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "📏 Square perimeter = 100 m. Side = ?",
      "options": { "A": "22 m", "B": "23 m", "C": "24 m", "D": "25 m" },
      "correct_answer": "D"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "🟦 Rectangle perimeter = 56 cm, width = 10 cm. Length = ?",
      "options": { "A": "16 cm", "B": "17 cm", "C": "18 cm", "D": "19 cm" },
      "correct_answer": "C"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "📐 Square side increased from 5 cm to 8 cm. Perimeter increase?",
      "options": { "A": "6 cm", "B": "9 cm", "C": "12 cm", "D": "15 cm" },
      "correct_answer": "C"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "🟨 Rectangle: length=15 cm, perimeter=50 cm. Width = ?",
      "options": { "A": "8 cm", "B": "9 cm", "C": "10 cm", "D": "11 cm" },
      "correct_answer": "C"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "📏 Square perimeter = 84 cm. Area = ?",
      "options": {
        "A": "400 cm²",
        "B": "441 cm²",
        "C": "484 cm²",
        "D": "529 cm²"
      },
      "correct_answer": "B"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "🏀 Basketball court 28m×15m. Perimeter = ?",
      "options": { "A": "78 m", "B": "82 m", "C": "86 m", "D": "90 m" },
      "correct_answer": "C"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "🟦 Rectangle perimeter = 72 m, length=24 m. Width = ?",
      "options": { "A": "10 m", "B": "11 m", "C": "12 m", "D": "13 m" },
      "correct_answer": "C"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "📐 Square perimeter = 120 cm. Side = ?",
      "options": { "A": "28 cm", "B": "29 cm", "C": "30 cm", "D": "31 cm" },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "🟨 Rectangle length:width = 3:2, perimeter=50 cm. Length = ?",
      "options": { "A": "12 cm", "B": "14 cm", "C": "15 cm", "D": "16 cm" },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "📏 Square perimeter = 144 m. Area = ?",
      "options": {
        "A": "1224 m²",
        "B": "1260 m²",
        "C": "1296 m²",
        "D": "1332 m²"
      },
      "correct_answer": "C"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "🟦 Rectangle: width=8 cm, perimeter=44 cm. Length = ?",
      "options": { "A": "12 cm", "B": "13 cm", "C": "14 cm", "D": "15 cm" },
      "correct_answer": "C"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "📐 Square perimeter in cm equals area in cm². Side = ?",
      "options": { "A": "3 cm", "B": "4 cm", "C": "5 cm", "D": "6 cm" },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "🟨 Rectangle perimeter = 68 m, length=20 m. Width = ?",
      "options": { "A": "12 m", "B": "13 m", "C": "14 m", "D": "15 m" },
      "correct_answer": "C"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "📏 Square perimeter increased by 20 cm. Each side increased by?",
      "options": { "A": "4 cm", "B": "5 cm", "C": "6 cm", "D": "7 cm" },
      "correct_answer": "B"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "🏠 Room perimeter 40 m, length 12 m. Area = ?",
      "options": { "A": "84 m²", "B": "90 m²", "C": "96 m²", "D": "102 m²" },
      "correct_answer": "C"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "🏡 Rectangular garden length twice width. Perimeter=180 m. Area = ?",
      "options": {
        "A": "1600 m²",
        "B": "1700 m²",
        "C": "1800 m²",
        "D": "1900 m²"
      },
      "correct_answer": "C"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "📏 Square and rectangle have same perimeter 48 cm. Rectangle length=15 cm. Which has larger area?",
      "options": {
        "A": "Square",
        "B": "Rectangle",
        "C": "Same",
        "D": "Can't say"
      },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "🟦 Rectangle perimeter decreased by 20% when both dimensions decreased by same %. Each decreased by?",
      "options": {
        "A": "10%",
        "B": "15%",
        "C": "20%",
        "D": "25%"
      },
      "correct_answer": "C"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "📐 Square perimeter = Rectangle perimeter. Rectangle length=18 cm, width=14 cm. Square area = ?",
      "options": {
        "A": "225 cm²",
        "B": "256 cm²",
        "C": "289 cm²",
        "D": "324 cm²"
      },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "🟨 Two rectangles: A=12×8, B=15×5. Difference in perimeters?",
      "options": { "A": "0", "B": "2", "C": "4", "D": "6" },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "🏠 Room 10m×8m. Border of 1m width carpet. Perimeter of inner area?",
      "options": {
        "A": "28 m",
        "B": "30 m",
        "C": "32 m",
        "D": "34 m"
      },
      "correct_answer": "A"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "📏 Square perimeter increased from 40 cm to 60 cm. Area increase?",
      "options": {
        "A": "125 cm²",
        "B": "150 cm²",
        "C": "175 cm²",
        "D": "200 cm²"
      },
      "correct_answer": "A"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "🟦 Rectangle length:width = 5:3. Perimeter=64 cm. Area = ?",
      "options": {
        "A": "180 cm²",
        "B": "210 cm²",
        "C": "240 cm²",
        "D": "225 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "📐 Square divided into 4 equal squares. Each small square perimeter=24 cm. Original square perimeter?",
      "options": { "A": "36 cm", "B": "42 cm", "C": "48 cm", "D": "54 cm" },
      "correct_answer": "C"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "🟨 Rectangle perimeter 54 cm. If length increased 3 cm, width decreased 3 cm, perimeter?",
      "options": { "A": "Same", "B": "54 cm", "C": "56 cm", "D": "58 cm" },
      "correct_answer": "B"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "🏡 Garden 30m×20m with 2m wide path inside. Perimeter of inner garden?",
      "options": {
        "A": "84 m",
        "B": "88 m",
        "C": "92 m",
        "D": "96 m"
      },
      "correct_answer": "A"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "📏 Square area = 256 cm². Rectangle has same perimeter, length=20 cm. Width = ?",
      "options": { "A": "10 cm", "B": "11 cm", "C": "12 cm", "D": "13 cm" },
      "correct_answer": "C"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "🟦 Two rectangles have same area 96 cm². One 12×8, other 16×6. Difference in perimeters?",
      "options": { "A": "0", "B": "2 cm", "C": "4 cm", "D": "6 cm" },
      "correct_answer": "C"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "📐 Square perimeter = 80 cm. Rectangle length=22 cm, same perimeter. Width = ?",
      "options": { "A": "16 cm", "B": "17 cm", "C": "18 cm", "D": "19 cm" },
      "correct_answer": "C"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "🟨 Rectangle length increased by 25%, width decreased by 20%. Perimeter change?",
      "options": {
        "A": "+2.5%",
        "B": "+5%",
        "C": "+10%",
        "D": "No change"
      },
      "correct_answer": "A"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "🏠 Room perimeter 60 m. If length and width increased by 2 m each, new perimeter?",
      "options": { "A": "64 m", "B": "66 m", "C": "68 m", "D": "70 m" },
      "correct_answer": "C"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "📏 Square perimeter = 96 cm. Circle inside square touching all sides. Circle diameter?",
      "options": { "A": "20 cm", "B": "22 cm", "C": "24 cm", "D": "26 cm" },
      "correct_answer": "C"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "🟦 Rectangle perimeter 72 cm. If made into square of same perimeter, area increase by 36 cm². Original rectangle dimensions?",
      "options": { "A": "20×16", "B": "22×14", "C": "24×12", "D": "26×10" },
      "correct_answer": "C"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "📐 Two squares: side ratio 3:4. Perimeter ratio = ?",
      "options": { "A": "3:4", "B": "6:8", "C": "9:16", "D": "12:16" },
      "correct_answer": "A"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "🏡 Field 45m×30m with 3m wide path inside. Perimeter of path inner edge?",
      "options": {
        "A": "126 m",
        "B": "132 m",
        "C": "138 m",
        "D": "144 m"
      },
      "correct_answer": "A"
    }
  ]
}