{
  "title": "Perimeter of Triangle, Square & Rectangle (Mensuration) - Grade 6 CBSE",
  "total_questions": 150,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "Perimeter of triangle with sides 3 cm, 4 cm, 5 cm?", "options": {"A": "6 cm", "B": "10 cm", "C": "12 cm", "D": "15 cm"}, "correct_answer": "C"},
    {"id": 2, "difficulty": "easy", "question": "Perimeter of square with side 6 cm?", "options": {"A": "12 cm", "B": "18 cm", "C": "24 cm", "D": "36 cm"}, "correct_answer": "C"},
    {"id": 3, "difficulty": "easy", "question": "Perimeter of rectangle: length 8 cm, width 5 cm?", "options": {"A": "13 cm", "B": "26 cm", "C": "40 cm", "D": "80 cm"}, "correct_answer": "B"},
    {"id": 4, "difficulty": "easy", "question": "Triangle sides: 7 cm, 9 cm, 11 cm. Perimeter?", "options": {"A": "25 cm", "B": "27 cm", "C": "29 cm", "D": "31 cm"}, "correct_answer": "B"},
    {"id": 5, "difficulty": "easy", "question": "Square side = 9 m. Perimeter?", "options": {"A": "18 m", "B": "27 m", "C": "36 m", "D": "81 m"}, "correct_answer": "C"},
    {"id": 6, "difficulty": "easy", "question": "Rectangle: 12 m long, 7 m wide. Perimeter?", "options": {"A": "19 m", "B": "38 m", "C": "84 m", "D": "168 m"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "Triangle with sides 5 cm, 12 cm, 13 cm. Perimeter?", "options": {"A": "25 cm", "B": "28 cm", "C": "30 cm", "D": "35 cm"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "Square side = 15 cm. Perimeter?", "options": {"A": "30 cm", "B": "45 cm", "C": "60 cm", "D": "225 cm"}, "correct_answer": "C"},
    {"id": 9, "difficulty": "easy", "question": "Rectangle: 20 cm × 8 cm. Perimeter?", "options": {"A": "28 cm", "B": "56 cm", "C": "160 cm", "D": "320 cm"}, "correct_answer": "B"},
    {"id": 10, "difficulty": "easy", "question": "Triangle sides: 6 m, 8 m, 10 m. Perimeter?", "options": {"A": "22 m", "B": "24 m", "C": "26 m", "D": "28 m"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Square side = 11 m. Perimeter?", "options": {"A": "22 m", "B": "33 m", "C": "44 m", "D": "121 m"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Rectangle: 14 cm × 9 cm. Perimeter?", "options": {"A": "23 cm", "B": "46 cm", "C": "126 cm", "D": "252 cm"}, "correct_answer": "B"},
    {"id": 13, "difficulty": "easy", "question": "Triangle: 9 cm, 12 cm, 15 cm. Perimeter?", "options": {"A": "34 cm", "B": "35 cm", "C": "36 cm", "D": "37 cm"}, "correct_answer": "C"},
    {"id": 14, "difficulty": "easy", "question": "Square side = 18 cm. Perimeter?", "options": {"A": "36 cm", "B": "54 cm", "C": "72 cm", "D": "324 cm"}, "correct_answer": "C"},
    {"id": 15, "difficulty": "easy", "question": "Rectangle: 25 m × 10 m. Perimeter?", "options": {"A": "35 m", "B": "70 m", "C": "250 m", "D": "500 m"}, "correct_answer": "B"},
    {"id": 16, "difficulty": "easy", "question": "Triangle sides: 11 m, 13 m, 16 m. Perimeter?", "options": {"A": "38 m", "B": "39 m", "C": "40 m", "D": "41 m"}, "correct_answer": "C"},
    {"id": 17, "difficulty": "easy", "question": "Square side = 22 m. Perimeter?", "options": {"A": "44 m", "B": "66 m", "C": "88 m", "D": "484 m"}, "correct_answer": "C"},
    {"id": 18, "difficulty": "easy", "question": "Rectangle: 30 cm × 12 cm. Perimeter?", "options": {"A": "42 cm", "B": "84 cm", "C": "360 cm", "D": "720 cm"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "Triangle: 14 cm, 16 cm, 20 cm. Perimeter?", "options": {"A": "48 cm", "B": "49 cm", "C": "50 cm", "D": "51 cm"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "Square side = 17 cm. Perimeter?", "options": {"A": "34 cm", "B": "51 cm", "C": "68 cm", "D": "289 cm"}, "correct_answer": "C"},
    {"id": 21, "difficulty": "medium", "question": "Equilateral triangle side = 12 cm. Perimeter?", "options": {"A": "24 cm", "B": "36 cm", "C": "48 cm", "D": "60 cm"}, "correct_answer": "B"},
    {"id": 22, "difficulty": "medium", "question": "Isosceles triangle: equal sides 15 cm, base 12 cm. Perimeter?", "options": {"A": "27 cm", "B": "30 cm", "C": "42 cm", "D": "45 cm"}, "correct_answer": "C"},
    {"id": 23, "difficulty": "medium", "question": "Scalene triangle: sides 8.5 cm, 11.2 cm, 9.7 cm. Perimeter?", "options": {"A": "28.4 cm", "B": "29.4 cm", "C": "30.4 cm", "D": "31.4 cm"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "Rectangle: length = 3.5 times width. Width = 4 cm. Perimeter?", "options": {"A": "18 cm", "B": "24 cm", "C": "36 cm", "D": "48 cm"}, "correct_answer": "C"},
    {"id": 25, "difficulty": "medium", "question": "Square perimeter = 48 cm. Find side.", "options": {"A": "8 cm", "B": "10 cm", "C": "12 cm", "D": "14 cm"}, "correct_answer": "C"},
    {"id": 26, "difficulty": "medium", "question": "Triangle perimeter = 45 cm. Two sides are 15 cm and 18 cm. Find third side.", "options": {"A": "10 cm", "B": "11 cm", "C": "12 cm", "D": "13 cm"}, "correct_answer": "C"},
    {"id": 27, "difficulty": "medium", "question": "Rectangle perimeter = 56 m. Length = 16 m. Find width.", "options": {"A": "10 m", "B": "11 m", "C": "12 m", "D": "13 m"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "Equilateral triangle perimeter = 63 cm. Find side.", "options": {"A": "18 cm", "B": "19 cm", "C": "20 cm", "D": "21 cm"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "Isosceles triangle: perimeter = 40 cm, equal sides = 12 cm each. Find base.", "options": {"A": "14 cm", "B": "15 cm", "C": "16 cm", "D": "17 cm"}, "correct_answer": "C"},
    {"id": 30, "difficulty": "medium", "question": "Square and equilateral triangle have same perimeter 60 cm. Difference in sides?", "options": {"A": "5 cm", "B": "10 cm", "C": "15 cm", "D": "20 cm"}, "correct_answer": "A"},
    {"id": 31, "difficulty": "medium", "question": "Triangle sides in ratio 3:4:5. Perimeter = 72 cm. Find smallest side.", "options": {"A": "12 cm", "B": "15 cm", "C": "18 cm", "D": "21 cm"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "Rectangle: length twice width. Perimeter = 54 m. Find dimensions.", "options": {"A": "9 m × 18 m", "B": "10 m × 20 m", "C": "11 m × 22 m", "D": "12 m × 24 m"}, "correct_answer": "A"},
    {"id": 33, "difficulty": "medium", "question": "Square perimeter = 84 cm. Find area.", "options": {"A": "441 cm²", "B": "484 cm²", "C": "529 cm²", "D": "576 cm²"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "Triangle: sides (x+2), (2x-1), (3x-4). Perimeter = 32 cm. Find x.", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Rectangle and square have same perimeter 48 cm. Rectangle length = 14 cm. Find rectangle width.", "options": {"A": "8 cm", "B": "9 cm", "C": "10 cm", "D": "11 cm"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "Equilateral triangle side increased by 2 cm. Perimeter increased by?", "options": {"A": "2 cm", "B": "4 cm", "C": "6 cm", "D": "8 cm"}, "correct_answer": "C"},
    {"id": 37, "difficulty": "medium", "question": "Square side decreased by 3 cm. Perimeter decreased by?", "options": {"A": "3 cm", "B": "6 cm", "C": "9 cm", "D": "12 cm"}, "correct_answer": "D"},
    {"id": 38, "difficulty": "medium", "question": "Rectangle: length increased by 20%, width decreased by 20%. Perimeter change?", "options": {"A": "No change", "B": "4% decrease", "C": "4% increase", "D": "8% decrease"}, "correct_answer": "A"},
    {"id": 39, "difficulty": "medium", "question": "Triangle sides increased by 10% each. Perimeter increased by?", "options": {"A": "10%", "B": "20%", "C": "30%", "D": "33%"}, "correct_answer": "A"},
    {"id": 40, "difficulty": "medium", "question": "Two squares: side ratio 2:3. Perimeter ratio?", "options": {"A": "2:3", "B": "4:6", "C": "4:9", "D": "8:27"}, "correct_answer": "A"},
    {"id": 41, "difficulty": "medium", "question": "Perimeter of right triangle: legs 6 cm and 8 cm. Find perimeter.", "options": {"A": "20 cm", "B": "22 cm", "C": "24 cm", "D": "26 cm"}, "correct_answer": "C"},
    {"id": 42, "difficulty": "medium", "question": "Isosceles right triangle: hypotenuse = 10√2 cm. Find perimeter.", "options": {"A": "20 cm", "B": "20+10√2 cm", "C": "20+20√2 cm", "D": "40 cm"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "medium", "question": "Rectangle diagonal = 25 cm, length = 24 cm. Find perimeter.", "options": {"A": "56 cm", "B": "62 cm", "C": "68 cm", "D": "74 cm"}, "correct_answer": "B"},
    {"id": 44, "difficulty": "medium", "question": "Square diagonal = 14√2 cm. Find perimeter.", "options": {"A": "28 cm", "B": "42 cm", "C": "56 cm", "D": "84 cm"}, "correct_answer": "C"},
    {"id": 45, "difficulty": "medium", "question": "Triangle: two angles 60° each, side between them = 12 cm. Find perimeter.", "options": {"A": "30 cm", "B": "33 cm", "C": "36 cm", "D": "39 cm"}, "correct_answer": "C"},
    {"id": 46, "difficulty": "medium", "question": "Rectangle area = 96 cm², length = 12 cm. Find perimeter.", "options": {"A": "38 cm", "B": "40 cm", "C": "42 cm", "D": "44 cm"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "medium", "question": "Square area = 144 cm². Find perimeter.", "options": {"A": "36 cm", "B": "42 cm", "C": "48 cm", "D": "52 cm"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "medium", "question": "Triangle area = 24 cm², base = 8 cm, height = 6 cm. If it's right triangle, find perimeter.", "options": {"A": "22 cm", "B": "24 cm", "C": "26 cm", "D": "28 cm"}, "correct_answer": "B"},
    {"id": 49, "difficulty": "medium", "question": "Rectangle perimeter = 50 m, area = 150 m². Find dimensions.", "options": {"A": "10 m × 15 m", "B": "12 m × 13 m", "C": "5 m × 30 m", "D": "6 m × 25 m"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "medium", "question": "Square perimeter = perimeter of equilateral triangle. Triangle side = 16 cm. Find square side.", "options": {"A": "10 cm", "B": "11 cm", "C": "12 cm", "D": "13 cm"}, "correct_answer": "C"},
    {"id": 51, "difficulty": "medium", "question": "Triangle: sides 3x, 4x, 5x. Perimeter = 72 cm. Find longest side.", "options": {"A": "18 cm", "B": "24 cm", "C": "30 cm", "D": "36 cm"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "medium", "question": "Rectangle: length = 3/2 times width. Perimeter = 100 m. Find area.", "options": {"A": "500 m²", "B": "550 m²", "C": "600 m²", "D": "650 m²"}, "correct_answer": "C"},
    {"id": 53, "difficulty": "medium", "question": "Square and rectangle have same area 64 cm². Rectangle length = 16 cm. Find difference in perimeters.", "options": {"A": "4 cm", "B": "8 cm", "C": "12 cm", "D": "16 cm"}, "correct_answer": "B"},
    {"id": 54, "difficulty": "medium", "question": "Equilateral triangle and square have same perimeter. Triangle side = 20 cm. Find square area.", "options": {"A": "225 cm²", "B": "256 cm²", "C": "289 cm²", "D": "324 cm²"}, "correct_answer": "A"},
    {"id": 55, "difficulty": "medium", "question": "Triangle perimeter = 45 cm. If each side increased by 3 cm, new perimeter?", "options": {"A": "48 cm", "B": "51 cm", "C": "54 cm", "D": "57 cm"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "medium", "question": "Rectangle: if length and width both doubled, perimeter becomes?", "options": {"A": "Same", "B": "Double", "C": "Triple", "D": "Quadruple"}, "correct_answer": "B"},
    {"id": 57, "difficulty": "medium", "question": "Square: if side halved, perimeter becomes?", "options": {"A": "Half", "B": "One-fourth", "C": "Double", "D": "Same"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "medium", "question": "Triangle: if all sides multiplied by 1.5, perimeter multiplied by?", "options": {"A": "1.5", "B": "2.25", "C": "3", "D": "4.5"}, "correct_answer": "A"},
    {"id": 59, "difficulty": "medium", "question": "Perimeter of regular hexagon side 5 cm equals perimeter of square. Find square side.", "options": {"A": "6.5 cm", "B": "7 cm", "C": "7.5 cm", "D": "8 cm"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "medium", "question": "Rectangle perimeter 48 cm. If converted to square of same perimeter, area change?", "options": {"A": "Increases", "B": "Decreases", "C": "Same", "D": "Cannot determine"}, "correct_answer": "D"},
    {"id": 61, "difficulty": "medium", "question": "Find perimeter of triangle with sides 8.5 cm, 12.3 cm, 9.8 cm.", "options": {"A": "29.6 cm", "B": "30.6 cm", "C": "31.6 cm", "D": "32.6 cm"}, "correct_answer": "B"},
    {"id": 62, "difficulty": "medium", "question": "Square side = 15.6 cm. Perimeter?", "options": {"A": "31.2 cm", "B": "46.8 cm", "C": "62.4 cm", "D": "93.6 cm"}, "correct_answer": "C"},
    {"id": 63, "difficulty": "medium", "question": "Rectangle: 22.5 m × 14.8 m. Perimeter?", "options": {"A": "37.3 m", "B": "74.6 m", "C": "333 m", "D": "666 m"}, "correct_answer": "B"},
    {"id": 64, "difficulty": "medium", "question": "Triangle: 18.7 cm, 24.3 cm, 19.6 cm. Perimeter?", "options": {"A": "61.6 cm", "B": "62.6 cm", "C": "63.6 cm", "D": "64.6 cm"}, "correct_answer": "B"},
    {"id": 65, "difficulty": "medium", "question": "Square perimeter = 85.6 cm. Find side.", "options": {"A": "20.4 cm", "B": "21.4 cm", "C": "22.4 cm", "D": "23.4 cm"}, "correct_answer": "B"},
    {"id": 66, "difficulty": "medium", "question": "Rectangle perimeter = 123.4 m. Length = 35.2 m. Find width.", "options": {"A": "25.5 m", "B": "26.5 m", "C": "27.5 m", "D": "28.5 m"}, "correct_answer": "B"},
    {"id": 67, "difficulty": "medium", "question": "Triangle perimeter = 89.7 cm. Two sides: 28.4 cm and 31.6 cm. Find third side.", "options": {"A": "28.7 cm", "B": "29.7 cm", "C": "30.7 cm", "D": "31.7 cm"}, "correct_answer": "B"},
    {"id": 68, "difficulty": "medium", "question": "Equilateral triangle perimeter = 78.9 cm. Find side.", "options": {"A": "25.3 cm", "B": "26.3 cm", "C": "27.3 cm", "D": "28.3 cm"}, "correct_answer": "B"},
    {"id": 69, "difficulty": "medium", "question": "Isosceles triangle: equal sides = 18.5 cm each, perimeter = 56.8 cm. Find base.", "options": {"A": "18.8 cm", "B": "19.8 cm", "C": "20.8 cm", "D": "21.8 cm"}, "correct_answer": "B"},
    {"id": 70, "difficulty": "medium", "question": "Square and equilateral triangle have same perimeter 126.6 cm. Find square side.", "options": {"A": "31.65 cm", "B": "31.65 m", "C": "42.2 cm", "D": "42.2 m"}, "correct_answer": "A"},
    {"id": 71, "difficulty": "medium", "question": "Perimeter in meters: triangle sides 250 cm, 1.8 m, 3200 mm.", "options": {"A": "7.5 m", "B": "8.5 m", "C": "9.5 m", "D": "10.5 m"}, "correct_answer": "A"},
    {"id": 72, "difficulty": "medium", "question": "Square side = 0.45 m. Perimeter in cm?", "options": {"A": "45 cm", "B": "90 cm", "C": "180 cm", "D": "450 cm"}, "correct_answer": "C"},
    {"id": 73, "difficulty": "medium", "question": "Rectangle: 1.2 m × 85 cm. Perimeter in meters?", "options": {"A": "2.05 m", "B": "3.1 m", "C": "4.1 m", "D": "5.1 m"}, "correct_answer": "C"},
    {"id": 74, "difficulty": "medium", "question": "Triangle: 650 mm, 0.8 m, 92 cm. Perimeter in cm?", "options": {"A": "237 cm", "B": "247 cm", "C": "257 cm", "D": "267 cm"}, "correct_answer": "A"},
    {"id": 75, "difficulty": "medium", "question": "Square perimeter = 3.6 m. Side in cm?", "options": {"A": "45 cm", "B": "60 cm", "C": "75 cm", "D": "90 cm"}, "correct_answer": "D"},
    {"id": 76, "difficulty": "medium", "question": "Rectangle perimeter = 12.8 m. Length = 3.5 m. Width in cm?", "options": {"A": "190 cm", "B": "240 cm", "C": "290 cm", "D": "340 cm"}, "correct_answer": "C"},
    {"id": 77, "difficulty": "medium", "question": "Equilateral triangle perimeter = 7.5 m. Side in mm?", "options": {"A": "2500 mm", "B": "3000 mm", "C": "3500 mm", "D": "4000 mm"}, "correct_answer": "A"},
    {"id": 78, "difficulty": "medium", "question": "Triangle: 0.12 dam, 1300 mm, 1.5 m. Perimeter in meters?", "options": {"A": "4 m", "B": "5 m", "C": "6 m", "D": "7 m"}, "correct_answer": "A"},
    {"id": 79, "difficulty": "medium", "question": "Square side = 250 mm. Perimeter in dm?", "options": {"A": "10 dm", "B": "15 dm", "C": "20 dm", "D": "25 dm"}, "correct_answer": "A"},
    {"id": 80, "difficulty": "medium", "question": "Rectangle: 0.045 hm × 320 cm. Perimeter in meters?", "options": {"A": "15.4 m", "B": "16.4 m", "C": "17.4 m", "D": "18.4 m"}, "correct_answer": "A"},
    {"id": 81, "difficulty": "hard", "question": "Right triangle: area = 24 cm², one leg = 6 cm. Find perimeter.", "options": {"A": "20 cm", "B": "22 cm", "C": "24 cm", "D": "26 cm"}, "correct_answer": "C"},
    {"id": 82, "difficulty": "hard", "question": "Square and equilateral triangle have same perimeter 96 cm. Find difference in areas.", "options": {"A": "64√3 cm²", "B": "256 - 64√3 cm²", "C": "256 - 192√3 cm²", "D": "576 - 256√3 cm²"}, "correct_answer": "B"},
    {"id": 83, "difficulty": "hard", "question": "Rectangle: diagonal = 25 cm, perimeter = 62 cm. Find dimensions.", "options": {"A": "7 cm × 24 cm", "B": "9 cm × 22 cm", "C": "11 cm × 20 cm", "D": "13 cm × 18 cm"}, "correct_answer": "A"},
    {"id": 84, "difficulty": "hard", "question": "Triangle sides: (x+3), (2x-1), (3x-5). Perimeter = 47 cm. Find longest side.", "options": {"A": "12 cm", "B": "15 cm", "C": "18 cm", "D": "21 cm"}, "correct_answer": "C"},
    {"id": 85, "difficulty": "hard", "question": "Square perimeter increased by 20%. Area increased by?", "options": {"A": "20%", "B": "40%", "C": "44%", "D": "50%"}, "correct_answer": "C"},
    {"id": 86, "difficulty": "hard", "question": "Rectangle: length increased by 25%, width decreased to maintain same perimeter. Find width change.", "options": {"A": "20% decrease", "B": "25% decrease", "C": "30% decrease", "D": "33.33% decrease"}, "correct_answer": "A"},
    {"id": 87, "difficulty": "hard", "question": "Triangle sides in arithmetic progression. Perimeter = 45 cm, smallest side = 10 cm. Find sides.", "options": {"A": "10, 15, 20", "B": "10, 14, 21", "C": "10, 16, 19", "D": "10, 17, 18"}, "correct_answer": "A"},
    {"id": 88, "difficulty": "hard", "question": "Square and regular hexagon have same perimeter 72 cm. Find ratio of areas.", "options": {"A": "2:3√3", "B": "4:9√3", "C": "8:27√3", "D": "16:81√3"}, "correct_answer": "B"},
    {"id": 89, "difficulty": "hard", "question": "Right triangle inscribed in circle diameter 26 cm. Perimeter = 60 cm. Find legs.", "options": {"A": "10 cm, 24 cm", "B": "12 cm, 22 cm", "C": "14 cm, 20 cm", "D": "16 cm, 18 cm"}, "correct_answer": "A"},
    {"id": 90, "difficulty": "hard", "question": "Rectangle folded to form square. Rectangle perimeter = 50 cm, square perimeter = 40 cm. Find rectangle dimensions.", "options": {"A": "10 cm × 15 cm", "B": "12 cm × 13 cm", "C": "14 cm × 11 cm", "D": "16 cm × 9 cm"}, "correct_answer": "A"},
    {"id": 91, "difficulty": "hard", "question": "Triangle formed by points (0,0), (6,0), (0,8). Find perimeter.", "options": {"A": "20 units", "B": "22 units", "C": "24 units", "D": "26 units"}, "correct_answer": "C"},
    {"id": 92, "difficulty": "hard", "question": "Square divided into 4 equal squares. Original perimeter = 80 cm. Total perimeter of 4 small squares?", "options": {"A": "80 cm", "B": "120 cm", "C": "160 cm", "D": "200 cm"}, "correct_answer": "C"},
    {"id": 93, "difficulty": "hard", "question": "Equilateral triangle and square have same area. Triangle side = 12 cm. Find square perimeter.", "options": {"A": "24√√3 cm", "B": "36√√3 cm", "C": "48√√3 cm", "D": "72√√3 cm"}, "correct_answer": "C"},
    {"id": 94, "difficulty": "hard", "question": "Rectangle: if length and width increased by 2 cm each, area increases by 48 cm². Original perimeter = 40 cm. Find original dimensions.", "options": {"A": "6 cm × 14 cm", "B": "8 cm × 12 cm", "C": "10 cm × 10 cm", "D": "9 cm × 11 cm"}, "correct_answer": "B"},
    {"id": 95, "difficulty": "hard", "question": "Right triangle: hypotenuse 25 cm, perimeter 56 cm. Find area.", "options": {"A": "84 cm²", "B": "96 cm²", "C": "108 cm²", "D": "120 cm²"}, "correct_answer": "A"},
    {"id": 96, "difficulty": "hard", "question": "Square corners cut to form regular octagon. Original square side = 20 cm. Octagon perimeter?", "options": {"A": "64 cm", "B": "72 cm", "C": "80 cm", "D": "88 cm"}, "correct_answer": "C"},
    {"id": 97, "difficulty": "hard", "question": "Triangle sides: √50 cm, √72 cm, √98 cm. Find perimeter in simplest form.", "options": {"A": "10√2 cm", "B": "12√2 cm", "C": "14√2 cm", "D": "16√2 cm"}, "correct_answer": "C"},
    {"id": 98, "difficulty": "hard", "question": "Rectangle and circle have same perimeter 44 cm. Find difference in areas. (π≈22/7)", "options": {"A": "49 cm²", "B": "56 cm²", "C": "63 cm²", "D": "70 cm²"}, "correct_answer": "A"},
    {"id": 99, "difficulty": "hard", "question": "Square folded along diagonal. Perimeter of resulting triangle = 20+10√2 cm. Find original square perimeter.", "options": {"A": "20 cm", "B": "30 cm", "C": "40 cm", "D": "50 cm"}, "correct_answer": "C"},
    {"id": 100, "difficulty": "hard", "question": "Triangle sides: x², (x+1)², (x+2)². Perimeter = 77 cm. Find x.", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"}
 ,
{"id":101,"difficulty":"easy","question":"Find the perimeter of a triangle with sides 4 cm, 6 cm, and 8 cm.","options":{"A":"16 cm","B":"18 cm","C":"20 cm","D":"24 cm"},"correct_answer":"B"},
  {"id":102,"difficulty":"easy","question":"What is the perimeter of a square whose side is 10 cm?","options":{"A":"20 cm","B":"30 cm","C":"40 cm","D":"100 cm"},"correct_answer":"C"},
  {"id":103,"difficulty":"easy","question":"Find the perimeter of a rectangle of length 9 cm and breadth 4 cm.","options":{"A":"26 cm","B":"24 cm","C":"18 cm","D":"13 cm"},"correct_answer":"A"},
  {"id":104,"difficulty":"easy","question":"A triangle has sides 9 cm, 10 cm and 11 cm. What is its perimeter?","options":{"A":"28 cm","B":"29 cm","C":"30 cm","D":"31 cm"},"correct_answer":"C"},
  {"id":105,"difficulty":"easy","question":"What is the perimeter of a square of side 13 m?","options":{"A":"39 m","B":"52 m","C":"26 m","D":"169 m"},"correct_answer":"B"},
  {"id":106,"difficulty":"easy","question":"Find the perimeter of a rectangle measuring 15 m by 5 m.","options":{"A":"20 m","B":"30 m","C":"40 m","D":"50 m"},"correct_answer":"C"},
  {"id":107,"difficulty":"easy","question":"A triangle has sides 7 cm, 7 cm and 10 cm. Find its perimeter.","options":{"A":"21 cm","B":"22 cm","C":"23 cm","D":"24 cm"},"correct_answer":"D"},
  {"id":108,"difficulty":"easy","question":"What is the perimeter of a square of side 14 cm?","options":{"A":"42 cm","B":"49 cm","C":"56 cm","D":"196 cm"},"correct_answer":"C"},
  {"id":109,"difficulty":"easy","question":"Find the perimeter of a rectangle of length 18 cm and width 7 cm.","options":{"A":"25 cm","B":"36 cm","C":"50 cm","D":"70 cm"},"correct_answer":"C"},
  {"id":110,"difficulty":"easy","question":"Find the perimeter of a triangle with sides 8 m, 9 m and 13 m.","options":{"A":"28 m","B":"29 m","C":"30 m","D":"32 m"},"correct_answer":"D"},

  {"id":111,"difficulty":"medium","question":"An equilateral triangle has perimeter 75 cm. Find the length of one side.","options":{"A":"20 cm","B":"22 cm","C":"25 cm","D":"30 cm"},"correct_answer":"C"},
  {"id":112,"difficulty":"medium","question":"The perimeter of a rectangle is 64 cm. If its length is 18 cm, find its breadth.","options":{"A":"12 cm","B":"14 cm","C":"16 cm","D":"18 cm"},"correct_answer":"B"},
  {"id":113,"difficulty":"medium","question":"The sides of a triangle are in the ratio 2:3:4 and its perimeter is 54 cm. Find the longest side.","options":{"A":"12 cm","B":"18 cm","C":"24 cm","D":"30 cm"},"correct_answer":"C"},
  {"id":114,"difficulty":"medium","question":"A square has the same perimeter as a rectangle of length 14 cm and breadth 6 cm. Find the side of the square.","options":{"A":"8 cm","B":"9 cm","C":"10 cm","D":"11 cm"},"correct_answer":"C"},
  {"id":115,"difficulty":"medium","question":"The perimeter of a triangle is 48 cm. Two of its sides are 14 cm and 16 cm. Find the third side.","options":{"A":"16 cm","B":"17 cm","C":"18 cm","D":"20 cm"},"correct_answer":"C"},
  {"id":116,"difficulty":"medium","question":"A rectangle has length three times its breadth. If its perimeter is 96 m, find its breadth.","options":{"A":"8 m","B":"10 m","C":"12 m","D":"16 m"},"correct_answer":"C"},
  {"id":117,"difficulty":"medium","question":"The perimeter of a square is 72 cm. Find its area.","options":{"A":"144 cm²","B":"225 cm²","C":"324 cm²","D":"400 cm²"},"correct_answer":"C"},
  {"id":118,"difficulty":"medium","question":"The perimeter of a right triangle is 36 cm. If its two smaller sides are 9 cm and 12 cm, find the third side.","options":{"A":"13 cm","B":"14 cm","C":"15 cm","D":"16 cm"},"correct_answer":"C"},
  {"id":119,"difficulty":"medium","question":"Two squares have sides in the ratio 3:5. What is the ratio of their perimeters?","options":{"A":"3:5","B":"9:25","C":"6:25","D":"15:9"},"correct_answer":"A"},
  {"id":120,"difficulty":"medium","question":"A triangle has perimeter 60 cm. If each side is increased by 2 cm, what is the new perimeter?","options":{"A":"62 cm","B":"64 cm","C":"66 cm","D":"68 cm"},"correct_answer":"C"},

  {"id":121,"difficulty":"hard","question":"The perimeter of a square is numerically equal to the area of the square. Find the side of the square.","options":{"A":"3 cm","B":"4 cm","C":"5 cm","D":"6 cm"},"correct_answer":"B"},
  {"id":122,"difficulty":"hard","question":"A rectangle has perimeter 50 cm and area 144 cm². Find its dimensions.","options":{"A":"8 cm × 18 cm","B":"9 cm × 16 cm","C":"10 cm × 14.4 cm","D":"12 cm × 12 cm"},"correct_answer":"B"},
  {"id":123,"difficulty":"hard","question":"The sides of a triangle are x, x+2 and x+4. If the perimeter is 42 cm, find the value of x.","options":{"A":"10","B":"12","C":"14","D":"16"},"correct_answer":"A"},
  {"id":124,"difficulty":"hard","question":"A square and an equilateral triangle have the same perimeter of 60 cm. Find the difference between their sides.","options":{"A":"4 cm","B":"5 cm","C":"6 cm","D":"8 cm"},"correct_answer":"B"},
  {"id":125,"difficulty":"hard","question":"The perimeter of a rectangle is 88 m. If its length is 4 m more than its breadth, find its dimensions.","options":{"A":"20 m × 24 m","B":"18 m × 26 m","C":"22 m × 22 m","D":"16 m × 28 m"},"correct_answer":"A"},
  {"id":126,"difficulty":"hard","question":"A triangle has sides in arithmetic progression. Its perimeter is 45 cm and smallest side is 12 cm. Find the sides.","options":{"A":"12, 15, 18","B":"12, 14, 19","C":"12, 16, 17","D":"12, 18, 15"},"correct_answer":"A"},
  {"id":127,"difficulty":"hard","question":"The perimeter of a square is equal to the perimeter of a rectangle of length 18 cm and breadth 6 cm. Find the side of the square.","options":{"A":"10 cm","B":"12 cm","C":"14 cm","D":"15 cm"},"correct_answer":"B"},
  {"id":128,"difficulty":"hard","question":"A triangle has sides 5x, 6x and 7x. If its perimeter is 72 cm, find the longest side.","options":{"A":"24 cm","B":"28 cm","C":"30 cm","D":"36 cm"},"correct_answer":"C"},
  {"id":129,"difficulty":"hard","question":"A rectangle is changed into a square by reducing its length by 4 cm and increasing its breadth by 6 cm. If the original perimeter was 64 cm, find the side of the square.","options":{"A":"14 cm","B":"15 cm","C":"16 cm","D":"18 cm"},"correct_answer":"C"},
  {"id":130,"difficulty":"hard","question":"The perimeter of an equilateral triangle is equal to that of a square whose side is 12 cm. Find the side of the triangle.","options":{"A":"14 cm","B":"15 cm","C":"16 cm","D":"18 cm"},"correct_answer":"B"}
 ]
}