{
  "title": "Proportion (Ratio and Proportion) - Grade 5 ICSE",
  "total_questions": 90,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "Are 2:3 and 4:6 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Cannot say", "D": "Maybe" },
      "correct_answer": "A"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "Find the missing number: 3:5 = 6:___",
      "options": { "A": "8", "B": "9", "C": "10", "D": "12" },
      "correct_answer": "C"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "Are 4:8 and 6:12 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "Find x if 2:3 = x:9",
      "options": { "A": "4", "B": "5", "C": "6", "D": "7" },
      "correct_answer": "C"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "Are 5:10 and 10:20 in proportion?",
      "options": {
        "A": "Yes",
        "B": "No",
        "C": "Only sometimes",
        "D": "Depends"
      },
      "correct_answer": "A"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "Find the missing number: 4:7 = 12:___",
      "options": { "A": "18", "B": "20", "C": "21", "D": "24" },
      "correct_answer": "C"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Are 3:4 and 9:16 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Always" },
      "correct_answer": "B"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "Find x if 5:8 = 15:x",
      "options": { "A": "20", "B": "22", "C": "24", "D": "26" },
      "correct_answer": "C"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Are 6:9 and 10:15 in proportion?",
      "options": {
        "A": "Yes",
        "B": "No",
        "C": "Cannot determine",
        "D": "Both"
      },
      "correct_answer": "A"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "Find the missing number: 7:11 = 21:___",
      "options": { "A": "30", "B": "31", "C": "32", "D": "33" },
      "correct_answer": "D"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "Are 8:12 and 12:18 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Rarely" },
      "correct_answer": "A"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "Find x if 9:13 = 27:x",
      "options": { "A": "36", "B": "37", "C": "38", "D": "39" },
      "correct_answer": "D"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Are 10:15 and 14:21 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Always" },
      "correct_answer": "A"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "Find the missing number: 11:17 = 33:___",
      "options": { "A": "49", "B": "50", "C": "51", "D": "52" },
      "correct_answer": "C"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "Are 12:16 and 15:25 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Often", "D": "Seldom" },
      "correct_answer": "B"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Find x if 13:19 = 26:x",
      "options": { "A": "36", "B": "37", "C": "38", "D": "39" },
      "correct_answer": "C"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "Are 14:21 and 18:27 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Usually", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "Find the missing number: 15:23 = 45:___",
      "options": { "A": "67", "B": "68", "C": "69", "D": "70" },
      "correct_answer": "C"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "Are 16:24 and 20:30 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Always", "D": "Sometimes" },
      "correct_answer": "A"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "Find x if 17:25 = 34:x",
      "options": { "A": "48", "B": "49", "C": "50", "D": "51" },
      "correct_answer": "C"
    },
    {
      "id": 21,
      "difficulty": "easy",
      "question": "Are 18:27 and 22:33 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Often" },
      "correct_answer": "A"
    },
    {
      "id": 22,
      "difficulty": "easy",
      "question": "Find the missing number: 19:29 = 38:___",
      "options": { "A": "56", "B": "57", "C": "58", "D": "59" },
      "correct_answer": "C"
    },
    {
      "id": 23,
      "difficulty": "easy",
      "question": "Are 20:30 and 24:36 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Usually" },
      "correct_answer": "A"
    },
    {
      "id": 24,
      "difficulty": "easy",
      "question": "Find x if 21:31 = 42:x",
      "options": { "A": "60", "B": "61", "C": "62", "D": "63" },
      "correct_answer": "C"
    },
    {
      "id": 25,
      "difficulty": "easy",
      "question": "Are 22:33 and 26:39 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Always", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 26,
      "difficulty": "easy",
      "question": "Find the missing number: 23:35 = 46:___",
      "options": { "A": "68", "B": "69", "C": "70", "D": "71" },
      "correct_answer": "C"
    },
    {
      "id": 27,
      "difficulty": "easy",
      "question": "Are 24:36 and 28:42 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Often" },
      "correct_answer": "A"
    },
    {
      "id": 28,
      "difficulty": "easy",
      "question": "Find x if 25:37 = 50:x",
      "options": { "A": "72", "B": "73", "C": "74", "D": "75" },
      "correct_answer": "C"
    },
    {
      "id": 29,
      "difficulty": "easy",
      "question": "Are 26:39 and 30:45 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Usually" },
      "correct_answer": "A"
    },
    {
      "id": 30,
      "difficulty": "easy",
      "question": "Find the missing number: 27:41 = 54:___",
      "options": { "A": "81", "B": "82", "C": "83", "D": "84" },
      "correct_answer": "B"
    },
    {
      "id": 31,
      "difficulty": "easy",
      "question": "Are 28:42 and 32:48 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Always", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 32,
      "difficulty": "easy",
      "question": "Find x if 29:43 = 58:x",
      "options": { "A": "84", "B": "85", "C": "86", "D": "87" },
      "correct_answer": "C"
    },
    {
      "id": 33,
      "difficulty": "easy",
      "question": "Are 30:45 and 34:51 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Often" },
      "correct_answer": "A"
    },
    {
      "id": 34,
      "difficulty": "easy",
      "question": "Find the missing number: 31:47 = 62:___",
      "options": { "A": "93", "B": "94", "C": "95", "D": "96" },
      "correct_answer": "B"
    },
    {
      "id": 35,
      "difficulty": "easy",
      "question": "Are 32:48 and 36:54 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Usually" },
      "correct_answer": "A"
    },
    {
      "id": 36,
      "difficulty": "easy",
      "question": "Find x if 33:49 = 66:x",
      "options": { "A": "96", "B": "97", "C": "98", "D": "99" },
      "correct_answer": "C"
    },
    {
      "id": 37,
      "difficulty": "easy",
      "question": "Are 34:51 and 38:57 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Always", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 38,
      "difficulty": "easy",
      "question": "Find the missing number: 35:53 = 70:___",
      "options": { "A": "105", "B": "106", "C": "107", "D": "108" },
      "correct_answer": "B"
    },
    {
      "id": 39,
      "difficulty": "easy",
      "question": "Are 36:54 and 40:60 in proportion?",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Often" },
      "correct_answer": "A"
    },
    {
      "id": 40,
      "difficulty": "easy",
      "question": "Find x if 37:55 = 74:x",
      "options": { "A": "108", "B": "109", "C": "110", "D": "111" },
      "correct_answer": "C"
    },
    {
      "id": 41,
      "difficulty": "medium",
      "question": "If 4, 6, 8, x are in proportion, find x.",
      "options": { "A": "10", "B": "11", "C": "12", "D": "13" },
      "correct_answer": "C"
    },
    {
      "id": 42,
      "difficulty": "medium",
      "question": "Check if 12, 16, 21, 28 are in proportion.",
      "options": {
        "A": "Yes",
        "B": "No",
        "C": "Only first two",
        "D": "Only last two"
      },
      "correct_answer": "A"
    },
    {
      "id": 43,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 5, 7, 15.",
      "options": { "A": "18", "B": "19", "C": "20", "D": "21" },
      "correct_answer": "D"
    },
    {
      "id": 44,
      "difficulty": "medium",
      "question": "If 18, 24, 27, x are in proportion, find x.",
      "options": { "A": "34", "B": "35", "C": "36", "D": "37" },
      "correct_answer": "C"
    },
    {
      "id": 45,
      "difficulty": "medium",
      "question": "Check if 15, 25, 18, 30 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Only sometimes", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 8, 12, 20.",
      "options": { "A": "28", "B": "29", "C": "30", "D": "31" },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "medium",
      "question": "If 22, 33, 44, x are in proportion, find x.",
      "options": { "A": "64", "B": "65", "C": "66", "D": "67" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "medium",
      "question": "Check if 24, 36, 30, 45 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Always" },
      "correct_answer": "A"
    },
    {
      "id": 49,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 11, 13, 33.",
      "options": { "A": "38", "B": "39", "C": "40", "D": "41" },
      "correct_answer": "B"
    },
    {
      "id": 50,
      "difficulty": "medium",
      "question": "If 28, 42, 56, x are in proportion, find x.",
      "options": { "A": "82", "B": "83", "C": "84", "D": "85" },
      "correct_answer": "C"
    },
    {
      "id": 51,
      "difficulty": "medium",
      "question": "Check if 32, 48, 40, 60 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 52,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 14, 17, 42.",
      "options": { "A": "50", "B": "51", "C": "52", "D": "53" },
      "correct_answer": "B"
    },
    {
      "id": 53,
      "difficulty": "medium",
      "question": "If 35, 49, 60, x are in proportion, find x.",
      "options": { "A": "82", "B": "83", "C": "84", "D": "85" },
      "correct_answer": "C"
    },
    {
      "id": 54,
      "difficulty": "medium",
      "question": "Check if 40, 60, 50, 75 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Usually", "D": "Seldom" },
      "correct_answer": "A"
    },
    {
      "id": 55,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 16, 19, 48.",
      "options": { "A": "56", "B": "57", "C": "58", "D": "59" },
      "correct_answer": "B"
    },
    {
      "id": 56,
      "difficulty": "medium",
      "question": "If 44, 66, 77, x are in proportion, find x.",
      "options": {
        "A": "114",
        "B": "115",
        "C": "115.5",
        "D": "116"
      },
      "correct_answer": "C"
    },
    {
      "id": 57,
      "difficulty": "medium",
      "question": "Check if 48, 72, 60, 90 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Often" },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 18, 21, 54.",
      "options": { "A": "62", "B": "63", "C": "64", "D": "65" },
      "correct_answer": "B"
    },
    {
      "id": 59,
      "difficulty": "medium",
      "question": "If 52, 78, 91, x are in proportion, find x.",
      "options": {
        "A": "136",
        "B": "136.5",
        "C": "137",
        "D": "138"
      },
      "correct_answer": "B"
    },
    {
      "id": 60,
      "difficulty": "medium",
      "question": "Check if 56, 84, 70, 105 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Always", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 61,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 20, 23, 60.",
      "options": { "A": "68", "B": "69", "C": "70", "D": "71" },
      "correct_answer": "B"
    },
    {
      "id": 62,
      "difficulty": "medium",
      "question": "If 60, 90, 105, x are in proportion, find x.",
      "options": {
        "A": "157",
        "B": "157.5",
        "C": "158",
        "D": "159"
      },
      "correct_answer": "B"
    },
    {
      "id": 63,
      "difficulty": "medium",
      "question": "Check if 64, 96, 80, 120 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Usually" },
      "correct_answer": "A"
    },
    {
      "id": 64,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 22, 25, 66.",
      "options": { "A": "74", "B": "75", "C": "76", "D": "77" },
      "correct_answer": "B"
    },
    {
      "id": 65,
      "difficulty": "medium",
      "question": "If 68, 102, 119, x are in proportion, find x.",
      "options": {
        "A": "178",
        "B": "178.5",
        "C": "179",
        "D": "180"
      },
      "correct_answer": "B"
    },
    {
      "id": 66,
      "difficulty": "medium",
      "question": "Check if 72, 108, 90, 135 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Often" },
      "correct_answer": "A"
    },
    {
      "id": 67,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 24, 27, 72.",
      "options": { "A": "80", "B": "81", "C": "82", "D": "83" },
      "correct_answer": "B"
    },
    {
      "id": 68,
      "difficulty": "medium",
      "question": "If 76, 114, 133, x are in proportion, find x.",
      "options": {
        "A": "199",
        "B": "199.5",
        "C": "200",
        "D": "201"
      },
      "correct_answer": "B"
    },
    {
      "id": 69,
      "difficulty": "medium",
      "question": "Check if 80, 120, 100, 150 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Always", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 70,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 26, 29, 78.",
      "options": { "A": "86", "B": "87", "C": "88", "D": "89" },
      "correct_answer": "B"
    },
    {
      "id": 71,
      "difficulty": "medium",
      "question": "If 84, 126, 147, x are in proportion, find x.",
      "options": {
        "A": "220",
        "B": "220.5",
        "C": "221",
        "D": "222"
      },
      "correct_answer": "B"
    },
    {
      "id": 72,
      "difficulty": "medium",
      "question": "Check if 88, 132, 110, 165 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Sometimes", "D": "Usually" },
      "correct_answer": "A"
    },
    {
      "id": 73,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 28, 31, 84.",
      "options": { "A": "92", "B": "93", "C": "94", "D": "95" },
      "correct_answer": "B"
    },
    {
      "id": 74,
      "difficulty": "medium",
      "question": "If 92, 138, 161, x are in proportion, find x.",
      "options": {
        "A": "241",
        "B": "241.5",
        "C": "242",
        "D": "243"
      },
      "correct_answer": "B"
    },
    {
      "id": 75,
      "difficulty": "medium",
      "question": "Check if 96, 144, 120, 180 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Maybe", "D": "Often" },
      "correct_answer": "A"
    },
    {
      "id": 76,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 30, 33, 90.",
      "options": { "A": "98", "B": "99", "C": "100", "D": "101" },
      "correct_answer": "B"
    },
    {
      "id": 77,
      "difficulty": "medium",
      "question": "If 100, 150, 175, x are in proportion, find x.",
      "options": {
        "A": "262",
        "B": "262.5",
        "C": "263",
        "D": "264"
      },
      "correct_answer": "B"
    },
    {
      "id": 78,
      "difficulty": "medium",
      "question": "Check if 104, 156, 130, 195 are in proportion.",
      "options": { "A": "Yes", "B": "No", "C": "Always", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 79,
      "difficulty": "medium",
      "question": "Find the fourth proportional to 32, 35, 96.",
      "options": { "A": "104", "B": "105", "C": "106", "D": "107" },
      "correct_answer": "B"
    },
    {
      "id": 80,
      "difficulty": "medium",
      "question": "If 108, 162, 189, x are in proportion, find x.",
      "options": {
        "A": "283",
        "B": "283.5",
        "C": "284",
        "D": "285"
      },
      "correct_answer": "B"
    },
    {
      "id": 81,
      "difficulty": "hard",
      "question": "Find the mean proportional between 4 and 9.",
      "options": { "A": "5", "B": "6", "C": "7", "D": "8" },
      "correct_answer": "B"
    },
    {
      "id": 82,
      "difficulty": "hard",
      "question": "If a, b, c are in continued proportion, and a=12, c=27, find b.",
      "options": { "A": "16", "B": "17", "C": "18", "D": "19" },
      "correct_answer": "C"
    },
    {
      "id": 83,
      "difficulty": "hard",
      "question": "Find the mean proportional between 16 and 25.",
      "options": { "A": "18", "B": "19", "C": "20", "D": "21" },
      "correct_answer": "C"
    },
    {
      "id": 84,
      "difficulty": "hard",
      "question": "If 2, x, 8 are in continued proportion, find x.",
      "options": { "A": "3", "B": "4", "C": "5", "D": "6" },
      "correct_answer": "B"
    },
    {
      "id": 85,
      "difficulty": "hard",
      "question": "Find the mean proportional between 36 and 49.",
      "options": { "A": "40", "B": "41", "C": "42", "D": "43" },
      "correct_answer": "C"
    },
    {
      "id": 86,
      "difficulty": "hard",
      "question": "If 5, 15, x are in continued proportion, find x.",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "B"
    },
    {
      "id": 87,
      "difficulty": "hard",
      "question": "Find the mean proportional between 64 and 81.",
      "options": { "A": "70", "B": "71", "C": "72", "D": "73" },
      "correct_answer": "C"
    },
    {
      "id": 88,
      "difficulty": "hard",
      "question": "If 3, 12, x are in continued proportion, find x.",
      "options": { "A": "45", "B": "46", "C": "47", "D": "48" },
      "correct_answer": "D"
    },
    {
      "id": 89,
      "difficulty": "hard",
      "question": "Find the mean proportional between 100 and 121.",
      "options": { "A": "108", "B": "109", "C": "110", "D": "111" },
      "correct_answer": "C"
    },
    {
      "id": 90,
      "difficulty": "hard",
      "question": "If 7, 28, x are in continued proportion, find x.",
      "options": { "A": "110", "B": "111", "C": "112", "D": "113" },
      "correct_answer": "C"
    }
  ]
}