{
  "title": "Proportion (Ratio_and_Proportion) - Grade 6 CBSE",
  "total_questions": 150,
  "questions": [


    {"id": 1, "difficulty": "easy", "question": "Which of the following is a proportion?", "options": {"A": "2:3 = 4:6", "B": "2:3 = 3:5", "C": "1:2 = 4:3", "D": "5:6 = 7:9"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "Proportion compares two _______.", "options": {"A": "numbers", "B": "ratios", "C": "fractions", "D": "values"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "2:5 = 6:__ ?", "options": {"A": "10", "B": "12", "C": "15", "D": "18"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "If 3:9 = 1:x, then x = ?", "options": {"A": "27", "B": "6", "C": "3", "D": "9"}, "correct_answer": "D"},
    {"id": 5, "difficulty": "easy", "question": "4:8 is equal to:", "options": {"A": "1:2", "B": "2:1", "C": "3:6", "D": "5:10"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "Which pair forms a proportion?", "options": {"A": "3:6 = 5:10", "B": "2:4 = 3:7", "C": "1:3 = 2:5", "D": "4:9 = 8:10"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "Complete the proportion: 5:15 = 1:__", "options": {"A": "5", "B": "3", "C": "4", "D": "15"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "If a:b = c:d, it represents a _______.", "options": {"A": "ratio", "B": "proportion", "C": "fraction", "D": "division"}, "correct_answer": "D"},
    {"id": 9, "difficulty": "easy", "question": "8:16 = __:2", "options": {"A": "4", "B": "1", "C": "6", "D": "8"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "Which is true?", "options": {"A": "6:12 = 1:2", "B": "6:12 = 2:3", "C": "6:12 = 3:4", "D": "6:12 = 4:5"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "If 2:3 = x:9, find x.", "options": {"A": "6", "B": "5", "C": "4", "D": "3"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "3:6 = __:4", "options": {"A": "1", "B": "2", "C": "3", "D": "4"}, "correct_answer": "D"},
    {"id": 13, "difficulty": "easy", "question": "5:20 equals:", "options": {"A": "1:2", "B": "1:4", "C": "2:5", "D": "3:6"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "12:24 = 1:__", "options": {"A": "10", "B": "4", "C": "2", "D": "12"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Proportion means two ratios are ______.", "options": {"A": "equal", "B": "different", "C": "large", "D": "small"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "Which shows a proportion?", "options": {"A": "9:3 = 6:2", "B": "2:3 = 3:4", "C": "4:5 = 3:6", "D": "3:9 = 1:4"}, "correct_answer": "D"},
    {"id": 17, "difficulty": "easy", "question": "Ratio 7:14 equals:", "options": {"A": "1:2", "B": "2:1", "C": "3:4", "D": "4:3"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "10:20 = __:5", "options": {"A": "4", "B": "3", "C": "2", "D": "1"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "Which is proportional to 3:6?", "options": {"A": "1:2", "B": "2:5", "C": "4:9", "D": "3:8"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "If 4:10 = x:5, find x.", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "D"},


    {"id": 21, "difficulty": "medium", "question": "If a:b = 3:4 and b:c = 8:9, find a:c.", "options": {"A": "6:9", "B": "6:8", "C": "3:9", "D": "3:8"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Find x: 6:9 = x:15", "options": {"A": "8", "B": "10", "C": "12", "D": "15"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "In the proportion 8:x = 2:5, x = ?", "options": {"A": "18", "B": "20", "C": "15", "D": "10"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "12:18 = 4:x. Find x.", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "D"},
    {"id": 25, "difficulty": "medium", "question": "If x:20 = 3:5, x = ?", "options": {"A": "10", "B": "12", "C": "15", "D": "18"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "Find missing term: 9:27 = 3:x", "options": {"A": "7", "B": "9", "C": "10", "D": "11"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "7:21 = x:9, find x.", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "The value of x in 5:x = 4:12 is:", "options": {"A": "10", "B": "12", "C": "15", "D": "20"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "If 4:6 = x:9, find x.", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "In proportion 14:21 = x:3, x = ?", "options": {"A": "1", "B": "2", "C": "3", "D": "4"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "If x:16 = 3:8, x = ?", "options": {"A": "6", "B": "5", "C": "7", "D": "8"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "Which is a true proportion?", "options": {"A": "9:12 = 6:8", "B": "8:10 = 4:6", "C": "2:3 = 3:5", "D": "3:4 = 5:6"}, "correct_answer": "D"},
    {"id": 33, "difficulty": "medium", "question": "Find x: 11:33 = x:9", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "3:x = 9:12. Find x.", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "If 18:27 = x:6, x = ?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "Find missing value: 16:x = 4:1", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "D"},
    {"id": 37, "difficulty": "medium", "question": "If 2:x = 5:15, x = ?", "options": {"A": "4", "B": "6", "C": "8", "D": "10"}, "correct_answer": "A"},
    {"id": 38, "difficulty": "medium", "question": "5:25 = 1:x. Find x.", "options": {"A": "3", "B": "5", "C": "25", "D": "30"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "9:x = 3:4. Find x.", "options": {"A": "10", "B": "11", "C": "12", "D": "13"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "If 4:9 = x:18, x = ?", "options": {"A": "6", "B": "7", "C": "8", "D": "9"}, "correct_answer": "D"},


    {"id": 41, "difficulty": "hard", "question": "If a:b = 2:3 and b:c = 6:7, find a:c.", "options": {"A": "4:7", "B": "4:6", "C": "2:7", "D": "2:6"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "Find x: 14:28 = x:56", "options": {"A": "24", "B": "28", "C": "30", "D": "32"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "If x:45 = 4:9, find x.", "options": {"A": "18", "B": "20", "C": "15", "D": "12"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "In 27:81 = x:9, x = ?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "D"},
    {"id": 45, "difficulty": "hard", "question": "Find x: 5:8 = x:24", "options": {"A": "10", "B": "12", "C": "15", "D": "20"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "If 18:x = 6:4, x = ?", "options": {"A": "8", "B": "10", "C": "12", "D": "14"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "Find missing: x:32 = 7:16", "options": {"A": "12", "B": "14", "C": "15", "D": "16"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "If 3:11 = x:44, find x.", "options": {"A": "10", "B": "12", "C": "15", "D": "18"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "hard", "question": "Solve x: 25:x = 5:1", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "If 4:x = 9:27, x = ?", "options": {"A": "8", "B": "10", "C": "12", "D": "14"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "hard", "question": "Find x: 13:x = 39:12", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "6:x = 15:25, find x.", "options": {"A": "8", "B": "9", "C": "10", "D": "12"}, "correct_answer": "D"},
    {"id": 53, "difficulty": "hard", "question": "If 12:18 = x:27, x = ?", "options": {"A": "15", "B": "16", "C": "17", "D": "18"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "Find x: 21:28 = 3:x", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "Solve: x:50 = 6:15", "options": {"A": "18", "B": "20", "C": "22", "D": "24"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "If 45:60 = x:20, find x.", "options": {"A": "10", "B": "12", "C": "15", "D": "18"}, "correct_answer": "D"},
    {"id": 57, "difficulty": "hard", "question": "Find missing: 33:44 = x:16", "options": {"A": "10", "B": "11", "C": "12", "D": "13"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "If 9:x = 27:12, x = ?", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Find x: 5:x = 20:32", "options": {"A": "6", "B": "7", "C": "8", "D": "9"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "Solve: 14:21 = x:9", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "D"}
,
  {"id":61,"difficulty":"easy","question":"Which of these is a true proportion?","options":{"A":"4:6 = 8:12","B":"5:6 = 10:15","C":"3:4 = 6:10","D":"7:8 = 14:18"},"correct_answer":"A"},
  {"id":62,"difficulty":"easy","question":"Complete the proportion: 3:6 = 5:__","options":{"A":"8","B":"9","C":"10","D":"12"},"correct_answer":"C"},
  {"id":63,"difficulty":"easy","question":"If 2:4 = x:10, find x.","options":{"A":"2","B":"4","C":"5","D":"6"},"correct_answer":"C"},
  {"id":64,"difficulty":"easy","question":"Which pair forms a proportion?","options":{"A":"6:9 = 2:3","B":"4:5 = 6:8","C":"3:7 = 6:15","D":"5:8 = 10:20"},"correct_answer":"A"},
  {"id":65,"difficulty":"easy","question":"8:12 = __:3","options":{"A":"1","B":"2","C":"3","D":"4"},"correct_answer":"B"},
  {"id":66,"difficulty":"easy","question":"Which is proportional to 5:10?","options":{"A":"2:4","B":"3:6","C":"4:7","D":"6:11"},"correct_answer":"A"},
  {"id":67,"difficulty":"easy","question":"If 7:14 = x:4, x = ?","options":{"A":"1","B":"2","C":"3","D":"4"},"correct_answer":"B"},
  {"id":68,"difficulty":"easy","question":"Which statement is true?","options":{"A":"9:3 = 6:2","B":"4:6 = 6:8","C":"5:7 = 10:21","D":"3:5 = 6:20"},"correct_answer":"A"},
  {"id":69,"difficulty":"easy","question":"10:20 = __:8","options":{"A":"2","B":"3","C":"4","D":"5"},"correct_answer":"C"},
  {"id":70,"difficulty":"easy","question":"Which ratio makes a proportion with 6:9?","options":{"A":"2:3","B":"3:4","C":"4:5","D":"5:6"},"correct_answer":"A"},
  {"id":71,"difficulty":"easy","question":"Complete: 4:12 = 1:__","options":{"A":"2","B":"3","C":"4","D":"6"},"correct_answer":"B"},
  {"id":72,"difficulty":"easy","question":"If 3:5 = x:25, x = ?","options":{"A":"10","B":"12","C":"15","D":"20"},"correct_answer":"C"},
  {"id":73,"difficulty":"easy","question":"Which is a proportion?","options":{"A":"2:3 = 6:9","B":"4:7 = 8:15","C":"5:6 = 15:20","D":"3:8 = 6:20"},"correct_answer":"A"},
  {"id":74,"difficulty":"easy","question":"6:18 = __:6","options":{"A":"1","B":"2","C":"3","D":"4"},"correct_answer":"B"},
  {"id":75,"difficulty":"easy","question":"If 1:4 = x:16, x = ?","options":{"A":"2","B":"3","C":"4","D":"5"},"correct_answer":"C"},
  {"id":76,"difficulty":"easy","question":"Which pair is proportional?","options":{"A":"8:12 = 2:3","B":"5:9 = 10:15","C":"6:10 = 9:15","D":"4:11 = 8:25"},"correct_answer":"A"},
  {"id":77,"difficulty":"easy","question":"9:27 = 1:__","options":{"A":"2","B":"3","C":"4","D":"5"},"correct_answer":"B"},
  {"id":78,"difficulty":"easy","question":"If 4:6 = x:15, x = ?","options":{"A":"8","B":"9","C":"10","D":"12"},"correct_answer":"C"},
  {"id":79,"difficulty":"easy","question":"Which shows a proportion?","options":{"A":"7:21 = 1:3","B":"5:8 = 10:18","C":"6:7 = 12:15","D":"9:10 = 18:25"},"correct_answer":"A"},
  {"id":80,"difficulty":"easy","question":"12:16 = __:4","options":{"A":"2","B":"3","C":"4","D":"5"},"correct_answer":"C"},

  {"id":81,"difficulty":"medium","question":"If 4:7 = x:21, find x.","options":{"A":"10","B":"12","C":"14","D":"16"},"correct_answer":"C"},
  {"id":82,"difficulty":"medium","question":"Solve: 9:x = 12:16","options":{"A":"10","B":"11","C":"12","D":"13"},"correct_answer":"C"},
  {"id":83,"difficulty":"medium","question":"If 5:8 = x:32, x = ?","options":{"A":"15","B":"18","C":"20","D":"22"},"correct_answer":"C"},
  {"id":84,"difficulty":"medium","question":"Find x: 14:35 = x:10","options":{"A":"2","B":"3","C":"4","D":"5"},"correct_answer":"D"},
  {"id":85,"difficulty":"medium","question":"Solve: 16:x = 4:5","options":{"A":"18","B":"20","C":"22","D":"24"},"correct_answer":"B"},
  {"id":86,"difficulty":"medium","question":"If 6:9 = x:27, x = ?","options":{"A":"12","B":"15","C":"18","D":"21"},"correct_answer":"C"},
  {"id":87,"difficulty":"medium","question":"Find missing term: 7:x = 21:30","options":{"A":"8","B":"9","C":"10","D":"12"},"correct_answer":"C"},
  {"id":88,"difficulty":"medium","question":"If 15:20 = x:12, x = ?","options":{"A":"6","B":"8","C":"9","D":"10"},"correct_answer":"C"},
  {"id":89,"difficulty":"medium","question":"Solve: x:18 = 5:6","options":{"A":"12","B":"14","C":"15","D":"16"},"correct_answer":"C"},
  {"id":90,"difficulty":"medium","question":"If 10:x = 25:40, x = ?","options":{"A":"12","B":"14","C":"16","D":"18"},"correct_answer":"C"},

  {"id":91,"difficulty":"medium","question":"Find x: 8:12 = x:18","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":92,"difficulty":"medium","question":"Solve: 21:x = 7:5","options":{"A":"12","B":"13","C":"14","D":"15"},"correct_answer":"C"},
  {"id":93,"difficulty":"medium","question":"If 18:24 = x:16, x = ?","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":94,"difficulty":"medium","question":"Find x: 11:22 = x:6","options":{"A":"2","B":"3","C":"4","D":"5"},"correct_answer":"B"},
  {"id":95,"difficulty":"medium","question":"Solve: 20:x = 5:4","options":{"A":"14","B":"15","C":"16","D":"18"},"correct_answer":"C"},
  {"id":96,"difficulty":"medium","question":"If 9:15 = x:25, x = ?","options":{"A":"12","B":"13","C":"15","D":"18"},"correct_answer":"C"},
  {"id":97,"difficulty":"medium","question":"Find missing value: 14:x = 7:9","options":{"A":"16","B":"18","C":"20","D":"22"},"correct_answer":"B"},
  {"id":98,"difficulty":"medium","question":"Solve: x:20 = 6:10","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":99,"difficulty":"medium","question":"If 24:36 = x:18, x = ?","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":100,"difficulty":"medium","question":"Find x: 5:9 = x:27","options":{"A":"12","B":"13","C":"15","D":"18"},"correct_answer":"C"},

  {"id":101,"difficulty":"medium","question":"Solve: 16:24 = x:30","options":{"A":"18","B":"19","C":"20","D":"22"},"correct_answer":"C"},
  {"id":102,"difficulty":"medium","question":"If 7:x = 14:20, x = ?","options":{"A":"9","B":"10","C":"11","D":"12"},"correct_answer":"B"},
  {"id":103,"difficulty":"medium","question":"Find x: 12:18 = x:24","options":{"A":"14","B":"15","C":"16","D":"18"},"correct_answer":"C"},
  {"id":104,"difficulty":"medium","question":"Solve: 30:x = 6:4","options":{"A":"18","B":"19","C":"20","D":"22"},"correct_answer":"C"},
  {"id":105,"difficulty":"medium","question":"If 10:14 = x:21, x = ?","options":{"A":"12","B":"13","C":"15","D":"18"},"correct_answer":"C"},
  {"id":106,"difficulty":"medium","question":"Find missing term: 9:x = 27:30","options":{"A":"9","B":"10","C":"11","D":"12"},"correct_answer":"B"},
  {"id":107,"difficulty":"medium","question":"Solve: 18:x = 9:5","options":{"A":"8","B":"9","C":"10","D":"12"},"correct_answer":"C"},
  {"id":108,"difficulty":"medium","question":"If 25:40 = x:16, x = ?","options":{"A":"8","B":"9","C":"10","D":"12"},"correct_answer":"C"},
  {"id":109,"difficulty":"medium","question":"Find x: 14:21 = x:28","options":{"A":"16","B":"17","C":"18","D":"20"},"correct_answer":"C"},
  {"id":110,"difficulty":"medium","question":"Solve: 20:x = 15:9","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},

  {"id":111,"difficulty":"medium","question":"If 12:20 = x:30, x = ?","options":{"A":"16","B":"17","C":"18","D":"20"},"correct_answer":"C"},
  {"id":112,"difficulty":"medium","question":"Solve: 8:x = 12:18","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":113,"difficulty":"medium","question":"Find x: 15:25 = x:20","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":114,"difficulty":"medium","question":"Solve: 21:x = 14:8","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":115,"difficulty":"medium","question":"If 18:30 = x:20, x = ?","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":116,"difficulty":"medium","question":"Find x: 24:36 = x:30","options":{"A":"18","B":"19","C":"20","D":"22"},"correct_answer":"C"},
  {"id":117,"difficulty":"medium","question":"Solve: 16:x = 12:9","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":118,"difficulty":"medium","question":"If 10:15 = x:18, x = ?","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":119,"difficulty":"medium","question":"Find x: 18:27 = x:36","options":{"A":"22","B":"23","C":"24","D":"26"},"correct_answer":"C"},
  {"id":120,"difficulty":"medium","question":"Solve: 20:x = 30:18","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},

  {"id":121,"difficulty":"medium","question":"If 12:16 = x:20, x = ?","options":{"A":"14","B":"15","C":"16","D":"18"},"correct_answer":"C"},
  {"id":122,"difficulty":"medium","question":"Solve: 15:x = 9:6","options":{"A":"8","B":"9","C":"10","D":"12"},"correct_answer":"C"},
  {"id":123,"difficulty":"medium","question":"Find x: 21:28 = x:40","options":{"A":"28","B":"29","C":"30","D":"32"},"correct_answer":"C"},
  {"id":124,"difficulty":"medium","question":"Solve: 18:x = 12:8","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":125,"difficulty":"medium","question":"If 25:35 = x:28, x = ?","options":{"A":"18","B":"19","C":"20","D":"22"},"correct_answer":"C"},
  {"id":126,"difficulty":"medium","question":"Find x: 16:24 = x:36","options":{"A":"22","B":"23","C":"24","D":"26"},"correct_answer":"C"},
  {"id":127,"difficulty":"medium","question":"Solve: 14:x = 21:30","options":{"A":"18","B":"19","C":"20","D":"22"},"correct_answer":"C"},
  {"id":128,"difficulty":"medium","question":"If 9:12 = x:20, x = ?","options":{"A":"13","B":"14","C":"15","D":"18"},"correct_answer":"C"},
  {"id":129,"difficulty":"medium","question":"Find x: 20:30 = x:45","options":{"A":"28","B":"29","C":"30","D":"32"},"correct_answer":"C"},
  {"id":130,"difficulty":"medium","question":"Solve: 24:x = 18:12","options":{"A":"14","B":"15","C":"16","D":"18"},"correct_answer":"C"},

  {"id":131,"difficulty":"hard","question":"If a:b = 4:5 and b:c = 10:12, find a:c.","options":{"A":"2:3","B":"4:6","C":"8:15","D":"10:15"},"correct_answer":"A"},
  {"id":132,"difficulty":"hard","question":"Solve: x:36 = 14:21","options":{"A":"22","B":"23","C":"24","D":"26"},"correct_answer":"C"},
  {"id":133,"difficulty":"hard","question":"If 15:x = 25:40, x = ?","options":{"A":"20","B":"22","C":"24","D":"25"},"correct_answer":"C"},
  {"id":134,"difficulty":"hard","question":"Find x: 27:45 = x:60","options":{"A":"34","B":"35","C":"36","D":"38"},"correct_answer":"C"},
  {"id":135,"difficulty":"hard","question":"Solve: 18:x = 24:16","options":{"A":"10","B":"11","C":"12","D":"14"},"correct_answer":"C"},
  {"id":136,"difficulty":"hard","question":"If 21:28 = x:56, x = ?","options":{"A":"40","B":"41","C":"42","D":"44"},"correct_answer":"C"},
  {"id":137,"difficulty":"hard","question":"Find x: 35:49 = x:84","options":{"A":"58","B":"59","C":"60","D":"62"},"correct_answer":"C"},
  {"id":138,"difficulty":"hard","question":"Solve: 16:x = 20:25","options":{"A":"18","B":"19","C":"20","D":"22"},"correct_answer":"C"},
  {"id":139,"difficulty":"hard","question":"If 24:36 = x:54, x = ?","options":{"A":"34","B":"35","C":"36","D":"38"},"correct_answer":"C"},
  {"id":140,"difficulty":"hard","question":"Find x: 45:60 = x:80","options":{"A":"58","B":"59","C":"60","D":"62"},"correct_answer":"C"},
  {"id":141,"difficulty":"hard","question":"Solve: 18:x = 27:15","options":{"A":"8","B":"9","C":"10","D":"12"},"correct_answer":"C"},
  {"id":142,"difficulty":"hard","question":"If 32:48 = x:72, x = ?","options":{"A":"46","B":"47","C":"48","D":"50"},"correct_answer":"C"},
  {"id":143,"difficulty":"hard","question":"Find x: 14:21 = x:63","options":{"A":"40","B":"41","C":"42","D":"44"},"correct_answer":"C"},
  {"id":144,"difficulty":"hard","question":"Solve: 25:x = 30:18","options":{"A":"14","B":"15","C":"16","D":"18"},"correct_answer":"C"},
  {"id":145,"difficulty":"hard","question":"If 36:54 = x:81, x = ?","options":{"A":"52","B":"53","C":"54","D":"56"},"correct_answer":"C"},
  {"id":146,"difficulty":"hard","question":"Find x: 40:60 = x:90","options":{"A":"58","B":"59","C":"60","D":"62"},"correct_answer":"C"},
  {"id":147,"difficulty":"hard","question":"Solve: 21:x = 28:20","options":{"A":"14","B":"15","C":"16","D":"18"},"correct_answer":"C"},
  {"id":148,"difficulty":"hard","question":"If 27:36 = x:96, x = ?","options":{"A":"70","B":"71","C":"72","D":"74"},"correct_answer":"C"},
  {"id":149,"difficulty":"hard","question":"Find x: 18:24 = x:64","options":{"A":"46","B":"47","C":"48","D":"50"},"correct_answer":"C"},
  {"id":150,"difficulty":"hard","question":"Solve: 35:49 = x:98","options":{"A":"68","B":"69","C":"70","D":"72"},"correct_answer":"C"}

  ]
}