{
  "title": "Successor and Predecessor - Grade 6 CBSE",
  "total_questions": 150,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "What is the successor of 5?", "options": {"A": "4", "B": "5", "C": "6", "D": "7"}, "correct_answer": "C"},
    {"id": 2, "difficulty": "easy", "question": "What is the predecessor of 10?", "options": {"A": "8", "B": "9", "C": "10", "D": "11"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Successor of 0 is:", "options": {"A": "0", "B": "1", "C": "-1", "D": "2"}, "correct_answer": "B"},
    {"id": 4, "difficulty": "easy", "question": "Predecessor of 1 is:", "options": {"A": "0", "B": "1", "C": "2", "D": "-1"}, "correct_answer": "A"},
    {"id": 5, "difficulty": "easy", "question": "What comes after 15?", "options": {"A": "14", "B": "15", "C": "16", "D": "17"}, "correct_answer": "C"},
    {"id": 6, "difficulty": "easy", "question": "What comes before 20?", "options": {"A": "18", "B": "19", "C": "20", "D": "21"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "Successor of 25 is:", "options": {"A": "24", "B": "25", "C": "26", "D": "27"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "Predecessor of 30 is:", "options": {"A": "28", "B": "29", "C": "30", "D": "31"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "What number comes immediately after 99?", "options": {"A": "98", "B": "99", "C": "100", "D": "101"}, "correct_answer": "C"},
    {"id": 10, "difficulty": "easy", "question": "What number comes immediately before 50?", "options": {"A": "48", "B": "49", "C": "50", "D": "51"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Successor of 75 is:", "options": {"A": "74", "B": "75", "C": "76", "D": "77"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Predecessor of 100 is:", "options": {"A": "98", "B": "99", "C": "100", "D": "101"}, "correct_answer": "B"},
    {"id": 13, "difficulty": "easy", "question": "What comes after 125?", "options": {"A": "124", "B": "125", "C": "126", "D": "127"}, "correct_answer": "C"},
    {"id": 14, "difficulty": "easy", "question": "What comes before 150?", "options": {"A": "148", "B": "149", "C": "150", "D": "151"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Successor of 200 is:", "options": {"A": "199", "B": "200", "C": "201", "D": "202"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "Predecessor of 250 is:", "options": {"A": "248", "B": "249", "C": "250", "D": "251"}, "correct_answer": "B"},
    {"id": 17, "difficulty": "easy", "question": "What number is 1 more than 88?", "options": {"A": "87", "B": "88", "C": "89", "D": "90"}, "correct_answer": "C"},
    {"id": 18, "difficulty": "easy", "question": "What number is 1 less than 64?", "options": {"A": "62", "B": "63", "C": "64", "D": "65"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "Successor of 999 is:", "options": {"A": "998", "B": "999", "C": "1000", "D": "1001"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "Predecessor of 1000 is:", "options": {"A": "998", "B": "999", "C": "1000", "D": "1001"}, "correct_answer": "B"},
    {"id": 21, "difficulty": "medium", "question": "What is the successor of successor of 45?", "options": {"A": "46", "B": "47", "C": "48", "D": "49"}, "correct_answer": "B"},
    {"id": 22, "difficulty": "medium", "question": "What is the predecessor of predecessor of 72?", "options": {"A": "69", "B": "70", "C": "71", "D": "72"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "If n is a whole number, what is the successor of n?", "options": {"A": "n-1", "B": "n", "C": "n+1", "D": "n+2"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "If n is a whole number greater than 0, what is the predecessor of n?", "options": {"A": "n-2", "B": "n-1", "C": "n", "D": "n+1"}, "correct_answer": "B"},
    {"id": 25, "difficulty": "medium", "question": "What is the predecessor of successor of 58?", "options": {"A": "57", "B": "58", "C": "59", "D": "60"}, "correct_answer": "B"},
    {"id": 26, "difficulty": "medium", "question": "What is the successor of predecessor of 84?", "options": {"A": "82", "B": "83", "C": "84", "D": "85"}, "correct_answer": "C"},
    {"id": 27, "difficulty": "medium", "question": "The difference between successor and predecessor of a number is:", "options": {"A": "0", "B": "1", "C": "2", "D": "3"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "What is the successor of 299?", "options": {"A": "298", "B": "299", "C": "300", "D": "301"}, "correct_answer": "C"},
    {"id": 29, "difficulty": "medium", "question": "What is the predecessor of 450?", "options": {"A": "448", "B": "449", "C": "450", "D": "451"}, "correct_answer": "B"},
    {"id": 30, "difficulty": "medium", "question": "Successor of 9999 is:", "options": {"A": "9998", "B": "9999", "C": "10000", "D": "10001"}, "correct_answer": "C"},
    {"id": 31, "difficulty": "medium", "question": "Predecessor of 5000 is:", "options": {"A": "4998", "B": "4999", "C": "5000", "D": "5001"}, "correct_answer": "B"},
    {"id": 32, "difficulty": "medium", "question": "What is 1 more than the successor of 123?", "options": {"A": "123", "B": "124", "C": "125", "D": "126"}, "correct_answer": "C"},
    {"id": 33, "difficulty": "medium", "question": "What is 1 less than the predecessor of 256?", "options": {"A": "253", "B": "254", "C": "255", "D": "256"}, "correct_answer": "B"},
    {"id": 34, "difficulty": "medium", "question": "Successor of predecessor of 100 is:", "options": {"A": "98", "B": "99", "C": "100", "D": "101"}, "correct_answer": "C"},
    {"id": 35, "difficulty": "medium", "question": "Predecessor of successor of 75 is:", "options": {"A": "74", "B": "75", "C": "76", "D": "77"}, "correct_answer": "B"},
    {"id": 36, "difficulty": "medium", "question": "What is the sum of successor of 48 and predecessor of 52?", "options": {"A": "98", "B": "99", "C": "100", "D": "101"}, "correct_answer": "C"},
    {"id": 37, "difficulty": "medium", "question": "The average of successor and predecessor of 60 is:", "options": {"A": "59", "B": "60", "C": "61", "D": "62"}, "correct_answer": "B"},
    {"id": 38, "difficulty": "medium", "question": "What is the product of successor of 9 and predecessor of 11?", "options": {"A": "90", "B": "99", "C": "100", "D": "110"}, "correct_answer": "C"},
    {"id": 39, "difficulty": "medium", "question": "Successor of 0 added to predecessor of 2 equals:", "options": {"A": "0", "B": "1", "C": "2", "D": "3"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "What is the difference between successor of 100 and predecessor of 100?", "options": {"A": "0", "B": "1", "C": "2", "D": "3"}, "correct_answer": "C"},
    {"id": 41, "difficulty": "medium", "question": "Find the successor of 375.", "options": {"A": "374", "B": "375", "C": "376", "D": "377"}, "correct_answer": "C"},
    {"id": 42, "difficulty": "medium", "question": "Find the predecessor of 888.", "options": {"A": "886", "B": "887", "C": "888", "D": "889"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "medium", "question": "What is the successor of successor of 199?", "options": {"A": "200", "B": "201", "C": "202", "D": "203"}, "correct_answer": "B"},
    {"id": 44, "difficulty": "medium", "question": "What is the predecessor of predecessor of 300?", "options": {"A": "297", "B": "298", "C": "299", "D": "300"}, "correct_answer": "B"},
    {"id": 45, "difficulty": "medium", "question": "If x = successor of 49, what is predecessor of x?", "options": {"A": "48", "B": "49", "C": "50", "D": "51"}, "correct_answer": "B"},
    {"id": 46, "difficulty": "medium", "question": "If y = predecessor of 67, what is successor of y?", "options": {"A": "65", "B": "66", "C": "67", "D": "68"}, "correct_answer": "C"},
    {"id": 47, "difficulty": "medium", "question": "What is successor of 500 minus predecessor of 500?", "options": {"A": "0", "B": "1", "C": "2", "D": "3"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "medium", "question": "Find the predecessor of 1001.", "options": {"A": "999", "B": "1000", "C": "1001", "D": "1002"}, "correct_answer": "B"},
    {"id": 49, "difficulty": "medium", "question": "Find the successor of 2499.", "options": {"A": "2498", "B": "2499", "C": "2500", "D": "2501"}, "correct_answer": "C"},
    {"id": 50, "difficulty": "medium", "question": "What is the predecessor of 7500?", "options": {"A": "7498", "B": "7499", "C": "7500", "D": "7501"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "medium", "question": "Successor of 0 multiplied by predecessor of 5 equals:", "options": {"A": "0", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 52, "difficulty": "medium", "question": "Difference between successor of 250 and predecessor of 250 is:", "options": {"A": "0", "B": "1", "C": "2", "D": "3"}, "correct_answer": "C"},
    {"id": 53, "difficulty": "medium", "question": "Sum of successor of 375 and predecessor of 375 equals:", "options": {"A": "748", "B": "749", "C": "750", "D": "751"}, "correct_answer": "C"},
    {"id": 54, "difficulty": "medium", "question": "What is 2 more than successor of 98?", "options": {"A": "99", "B": "100", "C": "101", "D": "102"}, "correct_answer": "C"},
    {"id": 55, "difficulty": "medium", "question": "What is 3 less than predecessor of 105?", "options": {"A": "100", "B": "101", "C": "102", "D": "103"}, "correct_answer": "B"},
    {"id": 56, "difficulty": "medium", "question": "Successor of predecessor of successor of 66 is:", "options": {"A": "65", "B": "66", "C": "67", "D": "68"}, "correct_answer": "B"},
    {"id": 57, "difficulty": "medium", "question": "Predecessor of successor of predecessor of 89 is:", "options": {"A": "87", "B": "88", "C": "89", "D": "90"}, "correct_answer": "C"},
    {"id": 58, "difficulty": "medium", "question": "If successor of x is 45, what is x?", "options": {"A": "43", "B": "44", "C": "45", "D": "46"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "medium", "question": "If predecessor of y is 72, what is y?", "options": {"A": "71", "B": "72", "C": "73", "D": "74"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "medium", "question": "What is the successor of the largest 2-digit number?", "options": {"A": "98", "B": "99", "C": "100", "D": "101"}, "correct_answer": "C"},
    {"id": 61, "difficulty": "medium", "question": "What is the predecessor of the smallest 3-digit number?", "options": {"A": "98", "B": "99", "C": "100", "D": "101"}, "correct_answer": "B"},
    {"id": 62, "difficulty": "medium", "question": "Successor of 999 added to predecessor of 1001 equals:", "options": {"A": "1998", "B": "1999", "C": "2000", "D": "2001"}, "correct_answer": "C"},
    {"id": 63, "difficulty": "medium", "question": "Difference between successor of 1000 and predecessor of 1000 is:", "options": {"A": "0", "B": "1", "C": "2", "D": "3"}, "correct_answer": "C"},
    {"id": 64, "difficulty": "medium", "question": "What is successor of 4999?", "options": {"A": "4998", "B": "4999", "C": "5000", "D": "5001"}, "correct_answer": "C"},
    {"id": 65, "difficulty": "medium", "question": "What is predecessor of 6001?", "options": {"A": "5999", "B": "6000", "C": "6001", "D": "6002"}, "correct_answer": "B"},
    {"id": 66, "difficulty": "medium", "question": "Sum of successor of 333 and predecessor of 333 is:", "options": {"A": "664", "B": "665", "C": "666", "D": "667"}, "correct_answer": "C"},
    {"id": 67, "difficulty": "medium", "question": "Product of successor of 19 and predecessor of 21 is:", "options": {"A": "380", "B": "390", "C": "400", "D": "410"}, "correct_answer": "C"},
    {"id": 68, "difficulty": "medium", "question": "What is successor of 0 multiplied by 100?", "options": {"A": "0", "B": "1", "C": "100", "D": "101"}, "correct_answer": "C"},
    {"id": 69, "difficulty": "medium", "question": "What is predecessor of 1 multiplied by 50?", "options": {"A": "-50", "B": "0", "C": "50", "D": "100"}, "correct_answer": "B"},
    {"id": 70, "difficulty": "medium", "question": "If n is whole number, successor of n minus predecessor of n equals:", "options": {"A": "0", "B": "1", "C": "2", "D": "n"}, "correct_answer": "C"},
    {"id": 71, "difficulty": "medium", "question": "Successor of 777 plus predecessor of 777 equals:", "options": {"A": "1552", "B": "1553", "C": "1554", "D": "1555"}, "correct_answer": "C"},
    {"id": 72, "difficulty": "medium", "question": "Predecessor of 100 minus successor of 98 equals:", "options": {"A": "-1", "B": "0", "C": "1", "D": "2"}, "correct_answer": "B"},
    {"id": 73, "difficulty": "medium", "question": "What is successor of 8888?", "options": {"A": "8887", "B": "8888", "C": "8889", "D": "8890"}, "correct_answer": "C"},
    {"id": 74, "difficulty": "medium", "question": "What is predecessor of 1234?", "options": {"A": "1232", "B": "1233", "C": "1234", "D": "1235"}, "correct_answer": "B"},
    {"id": 75, "difficulty": "medium", "question": "Successor of 5000 divided by predecessor of 5002 equals:", "options": {"A": "1", "B": "5000/5001", "C": "5001/5000", "D": "5001/5001"}, "correct_answer": "D"},
    {"id": 76, "difficulty": "medium", "question": "If successor of x is 1000, what is predecessor of x?", "options": {"A": "997", "B": "998", "C": "999", "D": "1000"}, "correct_answer": "B"},
    {"id": 77, "difficulty": "medium", "question": "If predecessor of y is 2499, what is successor of y?", "options": {"A": "2500", "B": "2501", "C": "2502", "D": "2503"}, "correct_answer": "B"},
    {"id": 78, "difficulty": "medium", "question": "Sum of successor of 999 and predecessor of 1001 equals:", "options": {"A": "1998", "B": "1999", "C": "2000", "D": "2001"}, "correct_answer": "C"},
    {"id": 79, "difficulty": "medium", "question": "Difference between successor of 1500 and 1500 equals:", "options": {"A": "-1", "B": "0", "C": "1", "D": "2"}, "correct_answer": "C"},
    {"id": 80, "difficulty": "medium", "question": "Difference between 2000 and predecessor of 2000 equals:", "options": {"A": "-1", "B": "0", "C": "1", "D": "2"}, "correct_answer": "C"},
    {"id": 81, "difficulty": "hard", "question": "What is the successor of the largest 3-digit number?", "options": {"A": "998", "B": "999", "C": "1000", "D": "1001"}, "correct_answer": "C"},
    {"id": 82, "difficulty": "hard", "question": "What is the predecessor of the smallest 4-digit number?", "options": {"A": "998", "B": "999", "C": "1000", "D": "1001"}, "correct_answer": "B"},
    {"id": 83, "difficulty": "hard", "question": "If the successor of a number is 5000, what is the predecessor of that number?", "options": {"A": "4997", "B": "4998", "C": "4999", "D": "5000"}, "correct_answer": "B"},
    {"id": 84, "difficulty": "hard", "question": "The sum of a number and its successor is 201. What is the number?", "options": {"A": "99", "B": "100", "C": "101", "D": "102"}, "correct_answer": "B"},
    {"id": 85, "difficulty": "hard", "question": "The sum of a number and its predecessor is 199. What is the number?", "options": {"A": "99", "B": "100", "C": "101", "D": "102"}, "correct_answer": "B"},
    {"id": 86, "difficulty": "hard", "question": "If the sum of successor and predecessor of a number is 200, what is the number?", "options": {"A": "99", "B": "100", "C": "101", "D": "102"}, "correct_answer": "B"},
    {"id": 87, "difficulty": "hard", "question": "The product of a number and its successor is 600. What is the number?", "options": {"A": "23", "B": "24", "C": "25", "D": "26"}, "correct_answer": "B"},
    {"id": 88, "difficulty": "hard", "question": "The product of a number and its predecessor is 600. What is the number?", "options": {"A": "24", "B": "25", "C": "26", "D": "27"}, "correct_answer": "B"},
    {"id": 89, "difficulty": "hard", "question": "What is the successor of successor of predecessor of 1000?", "options": {"A": "998", "B": "999", "C": "1000", "D": "1001"}, "correct_answer": "C"},
    {"id": 90, "difficulty": "hard", "question": "What is the predecessor of predecessor of successor of 500?", "options": {"A": "498", "B": "499", "C": "500", "D": "501"}, "correct_answer": "B"},
    {"id": 91, "difficulty": "hard", "question": "The sum of three consecutive numbers is 300. What is the middle number?", "options": {"A": "99", "B": "100", "C": "101", "D": "102"}, "correct_answer": "B"},
    {"id": 92, "difficulty": "hard", "question": "The sum of five consecutive numbers is 500. What is the middle number?", "options": {"A": "98", "B": "99", "C": "100", "D": "101"}, "correct_answer": "C"},
    {"id": 93, "difficulty": "hard", "question": "If the difference between successor and predecessor of a number is 2, what is the number?", "options": {"A": "Any whole number", "B": "Only even numbers", "C": "Only odd numbers", "D": "Only prime numbers"}, "correct_answer": "A"},
    {"id": 94, "difficulty": "hard", "question": "What is the successor of the predecessor of the successor of 9999?", "options": {"A": "9998", "B": "9999", "C": "10000", "D": "10001"}, "correct_answer": "B"},
    {"id": 95, "difficulty": "hard", "question": "What is the predecessor of the successor of the predecessor of 7500?", "options": {"A": "7498", "B": "7499", "C": "7500", "D": "7501"}, "correct_answer": "B"},
    {"id": 96, "difficulty": "hard", "question": "The average of a number, its predecessor, and its successor is 100. What is the number?", "options": {"A": "99", "B": "100", "C": "101", "D": "102"}, "correct_answer": "B"},
    {"id": 97, "difficulty": "hard", "question": "If n + (n+1) + (n+2) = 303, what is n?", "options": {"A": "99", "B": "100", "C": "101", "D": "102"}, "correct_answer": "B"},
    {"id": 98, "difficulty": "hard", "question": "What is the successor of the largest 4-digit number?", "options": {"A": "9998", "B": "9999", "C": "10000", "D": "10001"}, "correct_answer": "C"},
    {"id": 99, "difficulty": "hard", "question": "What is the predecessor of the smallest 5-digit number?", "options": {"A": "9998", "B": "9999", "C": "10000", "D": "10001"}, "correct_answer": "B"},
    {"id": 100, "difficulty": "hard", "question": "The sum of successor of 1000 and predecessor of 1000 is:", "options": {"A": "1998", "B": "1999", "C": "2000", "D": "2001"}, "correct_answer": "C"}
  ,
  {"id":101,"difficulty":"easy","question":"What is the successor of 300?","options":{"A":"299","B":"300","C":"301","D":"302"},"correct_answer":"C"},
  {"id":102,"difficulty":"easy","question":"What is the predecessor of 400?","options":{"A":"398","B":"399","C":"400","D":"401"},"correct_answer":"B"},
  {"id":103,"difficulty":"easy","question":"What number comes after 999?","options":{"A":"998","B":"999","C":"1000","D":"1001"},"correct_answer":"C"},
  {"id":104,"difficulty":"easy","question":"What number comes before 100?","options":{"A":"98","B":"99","C":"100","D":"101"},"correct_answer":"B"},
  {"id":105,"difficulty":"easy","question":"Successor of 45 is:","options":{"A":"44","B":"45","C":"46","D":"47"},"correct_answer":"C"},
  {"id":106,"difficulty":"easy","question":"Predecessor of 60 is:","options":{"A":"58","B":"59","C":"60","D":"61"},"correct_answer":"B"},
  {"id":107,"difficulty":"easy","question":"What is 1 more than 250?","options":{"A":"249","B":"250","C":"251","D":"252"},"correct_answer":"C"},
  {"id":108,"difficulty":"easy","question":"What is 1 less than 700?","options":{"A":"698","B":"699","C":"700","D":"701"},"correct_answer":"B"},
  {"id":109,"difficulty":"easy","question":"Successor of 888 is:","options":{"A":"887","B":"888","C":"889","D":"890"},"correct_answer":"C"},
  {"id":110,"difficulty":"easy","question":"Predecessor of 321 is:","options":{"A":"319","B":"320","C":"321","D":"322"},"correct_answer":"B"},

  {"id":111,"difficulty":"medium","question":"What is the successor of successor of 120?","options":{"A":"121","B":"122","C":"123","D":"124"},"correct_answer":"B"},
  {"id":112,"difficulty":"medium","question":"What is the predecessor of predecessor of 90?","options":{"A":"87","B":"88","C":"89","D":"90"},"correct_answer":"B"},
  {"id":113,"difficulty":"medium","question":"What is the predecessor of successor of 345?","options":{"A":"344","B":"345","C":"346","D":"347"},"correct_answer":"B"},
  {"id":114,"difficulty":"medium","question":"What is the successor of predecessor of 678?","options":{"A":"676","B":"677","C":"678","D":"679"},"correct_answer":"C"},
  {"id":115,"difficulty":"medium","question":"Difference between successor and predecessor of 500 is:","options":{"A":"0","B":"1","C":"2","D":"3"},"correct_answer":"C"},
  {"id":116,"difficulty":"medium","question":"Sum of successor and predecessor of 250 is:","options":{"A":"498","B":"499","C":"500","D":"501"},"correct_answer":"C"},
  {"id":117,"difficulty":"medium","question":"What is the average of successor and predecessor of 80?","options":{"A":"79","B":"80","C":"81","D":"82"},"correct_answer":"B"},
  {"id":118,"difficulty":"medium","question":"What is successor of 0 minus predecessor of 0?","options":{"A":"0","B":"1","C":"2","D":"-1"},"correct_answer":"C"},
  {"id":119,"difficulty":"medium","question":"If successor of x is 350, what is x?","options":{"A":"348","B":"349","C":"350","D":"351"},"correct_answer":"B"},
  {"id":120,"difficulty":"medium","question":"If predecessor of y is 799, what is y?","options":{"A":"798","B":"799","C":"800","D":"801"},"correct_answer":"C"},

  {"id":121,"difficulty":"medium","question":"What is successor of 999 added to predecessor of 1001?","options":{"A":"1998","B":"1999","C":"2000","D":"2001"},"correct_answer":"C"},
  {"id":122,"difficulty":"medium","question":"Difference between successor of 150 and 150 is:","options":{"A":"0","B":"1","C":"2","D":"3"},"correct_answer":"B"},
  {"id":123,"difficulty":"medium","question":"Difference between 600 and predecessor of 600 is:","options":{"A":"0","B":"1","C":"2","D":"3"},"correct_answer":"B"},
  {"id":124,"difficulty":"medium","question":"What is successor of 4321?","options":{"A":"4320","B":"4321","C":"4322","D":"4323"},"correct_answer":"C"},
  {"id":125,"difficulty":"medium","question":"What is predecessor of 9000?","options":{"A":"8998","B":"8999","C":"9000","D":"9001"},"correct_answer":"B"},
  {"id":126,"difficulty":"medium","question":"Sum of successor of 100 and predecessor of 100 is:","options":{"A":"198","B":"199","C":"200","D":"201"},"correct_answer":"C"},
  {"id":127,"difficulty":"medium","question":"Product of successor of 19 and predecessor of 21 is:","options":{"A":"360","B":"380","C":"400","D":"420"},"correct_answer":"C"},
  {"id":128,"difficulty":"medium","question":"What is successor of predecessor of successor of 250?","options":{"A":"249","B":"250","C":"251","D":"252"},"correct_answer":"B"},
  {"id":129,"difficulty":"medium","question":"What is predecessor of successor of predecessor of 1000?","options":{"A":"998","B":"999","C":"1000","D":"1001"},"correct_answer":"B"},
  {"id":130,"difficulty":"medium","question":"If n is a whole number, successor of n minus predecessor of n equals:","options":{"A":"0","B":"1","C":"2","D":"n"},"correct_answer":"C"},

  {"id":131,"difficulty":"hard","question":"The sum of a number and its successor is 401. What is the number?","options":{"A":"199","B":"200","C":"201","D":"202"},"correct_answer":"B"},
  {"id":132,"difficulty":"hard","question":"The sum of a number and its predecessor is 599. What is the number?","options":{"A":"299","B":"300","C":"301","D":"302"},"correct_answer":"B"},
  {"id":133,"difficulty":"hard","question":"The sum of successor and predecessor of a number is 1000. What is the number?","options":{"A":"498","B":"499","C":"500","D":"501"},"correct_answer":"C"},
  {"id":134,"difficulty":"hard","question":"The product of a number and its successor is 870. What is the number?","options":{"A":"28","B":"29","C":"30","D":"31"},"correct_answer":"B"},
  {"id":135,"difficulty":"hard","question":"The product of a number and its predecessor is 870. What is the number?","options":{"A":"29","B":"30","C":"31","D":"32"},"correct_answer":"B"},
  {"id":136,"difficulty":"hard","question":"What is successor of successor of predecessor of 5000?","options":{"A":"4999","B":"5000","C":"5001","D":"5002"},"correct_answer":"C"},
  {"id":137,"difficulty":"hard","question":"What is predecessor of predecessor of successor of 2000?","options":{"A":"1997","B":"1998","C":"1999","D":"2000"},"correct_answer":"B"},
  {"id":138,"difficulty":"hard","question":"The average of a number, its successor, and its predecessor is 750. What is the number?","options":{"A":"748","B":"749","C":"750","D":"751"},"correct_answer":"C"},
  {"id":139,"difficulty":"hard","question":"If n+(n+1)+(n+2)=1503, what is n?","options":{"A":"499","B":"500","C":"501","D":"502"},"correct_answer":"B"},
  {"id":140,"difficulty":"hard","question":"What is successor of the largest 5-digit number?","options":{"A":"99998","B":"99999","C":"100000","D":"100001"},"correct_answer":"C"},

  {"id":141,"difficulty":"hard","question":"What is predecessor of the smallest 6-digit number?","options":{"A":"99998","B":"99999","C":"100000","D":"100001"},"correct_answer":"B"},
  {"id":142,"difficulty":"hard","question":"The sum of five consecutive whole numbers is 2500. What is the middle number?","options":{"A":"498","B":"499","C":"500","D":"501"},"correct_answer":"C"},
  {"id":143,"difficulty":"hard","question":"The sum of three consecutive numbers is 1800. What is the middle number?","options":{"A":"598","B":"599","C":"600","D":"601"},"correct_answer":"C"},
  {"id":144,"difficulty":"hard","question":"What is successor of predecessor of successor of 99999?","options":{"A":"99998","B":"99999","C":"100000","D":"100001"},"correct_answer":"B"},
  {"id":145,"difficulty":"hard","question":"What is predecessor of successor of predecessor of 8500?","options":{"A":"8498","B":"8499","C":"8500","D":"8501"},"correct_answer":"B"},
  {"id":146,"difficulty":"hard","question":"The sum of successor of 2500 and predecessor of 2500 is:","options":{"A":"4998","B":"4999","C":"5000","D":"5001"},"correct_answer":"C"},
  {"id":147,"difficulty":"hard","question":"The difference between successor and predecessor of any whole number is:","options":{"A":"0","B":"1","C":"2","D":"3"},"correct_answer":"C"},
  {"id":148,"difficulty":"hard","question":"If successor of x is 10,000, what is predecessor of x?","options":{"A":"9997","B":"9998","C":"9999","D":"10000"},"correct_answer":"B"},
  {"id":149,"difficulty":"hard","question":"What is the successor of the largest 6-digit number?","options":{"A":"999998","B":"999999","C":"1000000","D":"1000001"},"correct_answer":"C"},
  {"id":150,"difficulty":"hard","question":"The sum of successor of 5000 and predecessor of 5000 is:","options":{"A":"9998","B":"9999","C":"10000","D":"10001"},"correct_answer":"C"}
]
}