{
  "title": "Subtraction of Integers - Grade 7 CBSE",
  "total_questions": 150,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "What is 5 - 3?", "options": {"A": "2", "B": "8", "C": "-2", "D": "-8"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "What is 7 - 9?", "options": {"A": "2", "B": "-2", "C": "16", "D": "-16"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Subtract: 4 - 6", "options": {"A": "10", "B": "2", "C": "-2", "D": "-10"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "What is 8 - 8?", "options": {"A": "0", "B": "16", "C": "-16", "D": "1"}, "correct_answer": "A"},
    {"id": 5, "difficulty": "easy", "question": "Calculate: 10 - 15", "options": {"A": "5", "B": "-5", "C": "25", "D": "-25"}, "correct_answer": "B"},
    {"id": 6, "difficulty": "easy", "question": "What is 3 - 7?", "options": {"A": "10", "B": "4", "C": "-4", "D": "-10"}, "correct_answer": "C"},
    {"id": 7, "difficulty": "easy", "question": "Subtract: 12 - 5", "options": {"A": "7", "B": "17", "C": "-7", "D": "-17"}, "correct_answer": "A"},
    {"id": 8, "difficulty": "easy", "question": "What is 0 - 5?", "options": {"A": "5", "B": "-5", "C": "0", "D": "-10"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "Calculate: 6 - 10", "options": {"A": "4", "B": "-4", "C": "16", "D": "-16"}, "correct_answer": "B"},
    {"id": 10, "difficulty": "easy", "question": "What is 9 - 4?", "options": {"A": "13", "B": "5", "C": "-5", "D": "-13"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Subtract: 15 - 20", "options": {"A": "5", "B": "-5", "C": "35", "D": "-35"}, "correct_answer": "B"},
    {"id": 12, "difficulty": "easy", "question": "What is 2 - 11?", "options": {"A": "9", "B": "-9", "C": "13", "D": "-13"}, "correct_answer": "B"},
    {"id": 13, "difficulty": "easy", "question": "Calculate: 1 - 1", "options": {"A": "0", "B": "2", "C": "-2", "D": "1"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "What is 20 - 25?", "options": {"A": "5", "B": "-5", "C": "45", "D": "-45"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Subtract: 18 - 8", "options": {"A": "10", "B": "26", "C": "-10", "D": "-26"}, "correct_answer": "A"},
    {"id": 16, "difficulty": "easy", "question": "What is 14 - 6?", "options": {"A": "8", "B": "20", "C": "-8", "D": "-20"}, "correct_answer": "A"},
    {"id": 17, "difficulty": "easy", "question": "Calculate: 25 - 30", "options": {"A": "5", "B": "-5", "C": "55", "D": "-55"}, "correct_answer": "B"},
    {"id": 18, "difficulty": "easy", "question": "What is 30 - 15?", "options": {"A": "15", "B": "45", "C": "-15", "D": "-45"}, "correct_answer": "A"},
    {"id": 19, "difficulty": "easy", "question": "Subtract: 40 - 40", "options": {"A": "0", "B": "80", "C": "-80", "D": "1"}, "correct_answer": "A"},
    {"id": 20, "difficulty": "easy", "question": "What is 100 - 50?", "options": {"A": "50", "B": "150", "C": "-50", "D": "-150"}, "correct_answer": "A"},

    {"id": 21, "difficulty": "medium", "question": "What is (-5) - 3?", "options": {"A": "2", "B": "-2", "C": "-8", "D": "8"}, "correct_answer": "C"},
    {"id": 22, "difficulty": "medium", "question": "Subtract: 8 - (-4)", "options": {"A": "4", "B": "12", "C": "-4", "D": "-12"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "Calculate: (-7) - (-2)", "options": {"A": "-9", "B": "-5", "C": "5", "D": "9"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "What is (-10) - 5?", "options": {"A": "-15", "B": "-5", "C": "5", "D": "15"}, "correct_answer": "A"},
    {"id": 25, "difficulty": "medium", "question": "Subtract: 12 - (-8)", "options": {"A": "4", "B": "20", "C": "-4", "D": "-20"}, "correct_answer": "B"},
    {"id": 26, "difficulty": "medium", "question": "Calculate: (-15) - (-10)", "options": {"A": "-25", "B": "-5", "C": "5", "D": "25"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "What is 0 - (-9)?", "options": {"A": "-9", "B": "9", "C": "0", "D": "-90"}, "correct_answer": "B"},
    {"id": 28, "difficulty": "medium", "question": "Subtract: (-20) - 15", "options": {"A": "-35", "B": "-5", "C": "5", "D": "35"}, "correct_answer": "A"},
    {"id": 29, "difficulty": "medium", "question": "Calculate: 25 - (-5)", "options": {"A": "20", "B": "30", "C": "-20", "D": "-30"}, "correct_answer": "B"},
    {"id": 30, "difficulty": "medium", "question": "What is (-30) - (-20)?", "options": {"A": "-50", "B": "-10", "C": "10", "D": "50"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "Subtract: (-8) - 8", "options": {"A": "0", "B": "16", "C": "-16", "D": "-0"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "Calculate: 40 - (-10)", "options": {"A": "30", "B": "50", "C": "-30", "D": "-50"}, "correct_answer": "B"},
    {"id": 33, "difficulty": "medium", "question": "What is (-12) - 12?", "options": {"A": "0", "B": "24", "C": "-24", "D": "-0"}, "correct_answer": "C"},
    {"id": 34, "difficulty": "medium", "question": "Subtract: (-25) - (-15)", "options": {"A": "-40", "B": "-10", "C": "10", "D": "40"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Calculate: 100 - (-50)", "options": {"A": "50", "B": "150", "C": "-50", "D": "-150"}, "correct_answer": "B"},
    {"id": 36, "difficulty": "medium", "question": "What is (-7) - 0?", "options": {"A": "7", "B": "-7", "C": "0", "D": "-70"}, "correct_answer": "B"},
    {"id": 37, "difficulty": "medium", "question": "Subtract: 0 - (-25)", "options": {"A": "-25", "B": "25", "C": "0", "D": "250"}, "correct_answer": "B"},
    {"id": 38, "difficulty": "medium", "question": "Calculate: (-18) - 12", "options": {"A": "-30", "B": "-6", "C": "6", "D": "30"}, "correct_answer": "A"},
    {"id": 39, "difficulty": "medium", "question": "What is 35 - (-15)?", "options": {"A": "20", "B": "50", "C": "-20", "D": "-50"}, "correct_answer": "B"},
    {"id": 40, "difficulty": "medium", "question": "Subtract: (-40) - (-40)", "options": {"A": "0", "B": "80", "C": "-80", "D": "1"}, "correct_answer": "A"},
    {"id": 41, "difficulty": "medium", "question": "Calculate: 9 - (-9)", "options": {"A": "0", "B": "18", "C": "-18", "D": "81"}, "correct_answer": "B"},
    {"id": 42, "difficulty": "medium", "question": "What is (-6) - (-6)?", "options": {"A": "0", "B": "12", "C": "-12", "D": "-36"}, "correct_answer": "A"},
    {"id": 43, "difficulty": "medium", "question": "Subtract: (-11) - 11", "options": {"A": "0", "B": "22", "C": "-22", "D": "-121"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "medium", "question": "Calculate: 50 - (-25)", "options": {"A": "25", "B": "75", "C": "-25", "D": "-75"}, "correct_answer": "B"},
    {"id": 45, "difficulty": "medium", "question": "What is (-14) - 6?", "options": {"A": "-20", "B": "-8", "C": "8", "D": "20"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "medium", "question": "Subtract: (-9) - (-3)", "options": {"A": "-12", "B": "-6", "C": "6", "D": "12"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "medium", "question": "Calculate: 16 - (-24)", "options": {"A": "8", "B": "40", "C": "-8", "D": "-40"}, "correct_answer": "B"},
    {"id": 48, "difficulty": "medium", "question": "What is (-21) - (-9)?", "options": {"A": "-30", "B": "-12", "C": "12", "D": "30"}, "correct_answer": "B"},
    {"id": 49, "difficulty": "medium", "question": "Subtract: (-35) - 5", "options": {"A": "-40", "B": "-30", "C": "30", "D": "40"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "medium", "question": "Calculate: 0 - (-100)", "options": {"A": "-100", "B": "100", "C": "0", "D": "1000"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "medium", "question": "What is 7 - (-13)?", "options": {"A": "-6", "B": "20", "C": "-20", "D": "6"}, "correct_answer": "B"},
    {"id": 52, "difficulty": "medium", "question": "Subtract: (-16) - (-4)", "options": {"A": "-20", "B": "-12", "C": "12", "D": "20"}, "correct_answer": "B"},
    {"id": 53, "difficulty": "medium", "question": "Calculate: 22 - (-18)", "options": {"A": "4", "B": "40", "C": "-4", "D": "-40"}, "correct_answer": "B"},
    {"id": 54, "difficulty": "medium", "question": "What is (-28) - 12?", "options": {"A": "-40", "B": "-16", "C": "16", "D": "40"}, "correct_answer": "A"},
    {"id": 55, "difficulty": "medium", "question": "Subtract: (-45) - (-15)", "options": {"A": "-60", "B": "-30", "C": "30", "D": "60"}, "correct_answer": "B"},
    {"id": 56, "difficulty": "medium", "question": "Calculate: 33 - (-17)", "options": {"A": "16", "B": "50", "C": "-16", "D": "-50"}, "correct_answer": "B"},
    {"id": 57, "difficulty": "medium", "question": "What is (-19) - 0?", "options": {"A": "19", "B": "-19", "C": "0", "D": "190"}, "correct_answer": "B"},
    {"id": 58, "difficulty": "medium", "question": "Subtract: 0 - (-55)", "options": {"A": "-55", "B": "55", "C": "0", "D": "550"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "medium", "question": "Calculate: (-60) - 20", "options": {"A": "-80", "B": "-40", "C": "40", "D": "80"}, "correct_answer": "A"},
    {"id": 60, "difficulty": "medium", "question": "What is 48 - (-12)?", "options": {"A": "36", "B": "60", "C": "-36", "D": "-60"}, "correct_answer": "B"},
    {"id": 61, "difficulty": "medium", "question": "Subtract: (-27) - (-7)", "options": {"A": "-34", "B": "-20", "C": "20", "D": "34"}, "correct_answer": "B"},
    {"id": 62, "difficulty": "medium", "question": "Calculate: 75 - (-25)", "options": {"A": "50", "B": "100", "C": "-50", "D": "-100"}, "correct_answer": "B"},
    {"id": 63, "difficulty": "medium", "question": "What is (-32) - 8?", "options": {"A": "-40", "B": "-24", "C": "24", "D": "40"}, "correct_answer": "A"},
    {"id": 64, "difficulty": "medium", "question": "Subtract: (-50) - (-10)", "options": {"A": "-60", "B": "-40", "C": "40", "D": "60"}, "correct_answer": "B"},
    {"id": 65, "difficulty": "medium", "question": "Calculate: 90 - (-10)", "options": {"A": "80", "B": "100", "C": "-80", "D": "-100"}, "correct_answer": "B"},
    {"id": 66, "difficulty": "medium", "question": "What is (-5) - (-5)?", "options": {"A": "0", "B": "10", "C": "-10", "D": "-25"}, "correct_answer": "A"},
    {"id": 67, "difficulty": "medium", "question": "Subtract: (-13) - 13", "options": {"A": "0", "B": "26", "C": "-26", "D": "-169"}, "correct_answer": "C"},
    {"id": 68, "difficulty": "medium", "question": "Calculate: 44 - (-26)", "options": {"A": "18", "B": "70", "C": "-18", "D": "-70"}, "correct_answer": "B"},
    {"id": 69, "difficulty": "medium", "question": "What is (-23) - 7?", "options": {"A": "-30", "B": "-16", "C": "16", "D": "30"}, "correct_answer": "A"},
    {"id": 70, "difficulty": "medium", "question": "Subtract: (-38) - (-8)", "options": {"A": "-46", "B": "-30", "C": "30", "D": "46"}, "correct_answer": "B"},
    {"id": 71, "difficulty": "medium", "question": "Calculate: 66 - (-34)", "options": {"A": "32", "B": "100", "C": "-32", "D": "-100"}, "correct_answer": "B"},
    {"id": 72, "difficulty": "medium", "question": "What is (-41) - 0?", "options": {"A": "41", "B": "-41", "C": "0", "D": "410"}, "correct_answer": "B"},
    {"id": 73, "difficulty": "medium", "question": "Subtract: 0 - (-72)", "options": {"A": "-72", "B": "72", "C": "0", "D": "720"}, "correct_answer": "B"},
    {"id": 74, "difficulty": "medium", "question": "Calculate: (-85) - 15", "options": {"A": "-100", "B": "-70", "C": "70", "D": "100"}, "correct_answer": "A"},
    {"id": 75, "difficulty": "medium", "question": "What is 52 - (-28)?", "options": {"A": "24", "B": "80", "C": "-24", "D": "-80"}, "correct_answer": "B"},
    {"id": 76, "difficulty": "medium", "question": "Subtract: (-29) - (-9)", "options": {"A": "-38", "B": "-20", "C": "20", "D": "38"}, "correct_answer": "B"},
    {"id": 77, "difficulty": "medium", "question": "Calculate: 88 - (-12)", "options": {"A": "76", "B": "100", "C": "-76", "D": "-100"}, "correct_answer": "B"},
    {"id": 78, "difficulty": "medium", "question": "What is (-37) - 13?", "options": {"A": "-50", "B": "-24", "C": "24", "D": "50"}, "correct_answer": "A"},
    {"id": 79, "difficulty": "medium", "question": "Subtract: (-64) - (-4)", "options": {"A": "-68", "B": "-60", "C": "60", "D": "68"}, "correct_answer": "B"},
    {"id": 80, "difficulty": "medium", "question": "Calculate: 95 - (-5)", "options": {"A": "90", "B": "100", "C": "-90", "D": "-100"}, "correct_answer": "B"},

    {"id": 81, "difficulty": "hard", "question": "What is the value of: (-15) - 8 - (-3)?", "options": {"A": "-20", "B": "-26", "C": "20", "D": "26"}, "correct_answer": "A"},
    {"id": 82, "difficulty": "hard", "question": "Simplify: 25 - (-12) - 7", "options": {"A": "30", "B": "44", "C": "20", "D": "18"}, "correct_answer": "A"},
    {"id": 83, "difficulty": "hard", "question": "Calculate: (-30) - 15 - (-10)", "options": {"A": "-35", "B": "-55", "C": "35", "D": "55"}, "correct_answer": "A"},
    {"id": 84, "difficulty": "hard", "question": "What is: 40 - (-25) - 15?", "options": {"A": "30", "B": "50", "C": "80", "D": "0"}, "correct_answer": "B"},
    {"id": 85, "difficulty": "hard", "question": "Simplify: (-18) - (-6) - 12", "options": {"A": "-24", "B": "0", "C": "24", "D": "-36"}, "correct_answer": "A"},
    {"id": 86, "difficulty": "hard", "question": "Calculate: 0 - (-50) - 25", "options": {"A": "-75", "B": "75", "C": "25", "D": "-25"}, "correct_answer": "C"},
    {"id": 87, "difficulty": "hard", "question": "What is: (-45) - 20 - (-5)?", "options": {"A": "-60", "B": "-70", "C": "60", "D": "70"}, "correct_answer": "A"},
    {"id": 88, "difficulty": "hard", "question": "Simplify: 60 - (-30) - 40", "options": {"A": "50", "B": "130", "C": "10", "D": "30"}, "correct_answer": "A"},
    {"id": 89, "difficulty": "hard", "question": "Calculate: (-75) - (-25) - 50", "options": {"A": "0", "B": "-100", "C": "100", "D": "-50"}, "correct_answer": "B"},
    {"id": 90, "difficulty": "hard", "question": "What is: 100 - (-40) - 60?", "options": {"A": "0", "B": "80", "C": "200", "D": "20"}, "correct_answer": "B"},
    {"id": 91, "difficulty": "hard", "question": "Simplify: (-12) - 8 - (-4) - 6", "options": {"A": "-22", "B": "-10", "C": "10", "D": "22"}, "correct_answer": "A"},
    {"id": 92, "difficulty": "hard", "question": "Calculate: 35 - (-15) - 20 - (-10)", "options": {"A": "20", "B": "40", "C": "60", "D": "80"}, "correct_answer": "B"},
    {"id": 93, "difficulty": "hard", "question": "What is: (-50) - 25 - (-15) - 10?", "options": {"A": "-70", "B": "-40", "C": "40", "D": "70"}, "correct_answer": "A"},
    {"id": 94, "difficulty": "hard", "question": "Simplify: 80 - (-20) - 30 - (-10)", "options": {"A": "40", "B": "60", "C": "80", "D": "100"}, "correct_answer": "C"},
    {"id": 95, "difficulty": "hard", "question": "Calculate: (-100) - (-50) - 25 - (-25)", "options": {"A": "-50", "B": "0", "C": "50", "D": "100"}, "correct_answer": "A"},
    {"id": 96, "difficulty": "hard", "question": "What is: 150 - (-75) - 100 - (-25)?", "options": {"A": "50", "B": "150", "C": "200", "D": "250"}, "correct_answer": "B"},
    {"id": 97, "difficulty": "hard", "question": "Simplify: (-200) - 100 - (-150) - 50", "options": {"A": "-200", "B": "-100", "C": "100", "D": "200"}, "correct_answer": "A"},
    {"id": 98, "difficulty": "hard", "question": "Calculate: 500 - (-250) - 300 - (-150)", "options": {"A": "300", "B": "600", "C": "900", "D": "1200"}, "correct_answer": "B"},
    {"id": 99, "difficulty": "hard", "question": "What is: (-1000) - (-500) - 250 - (-750)?", "options": {"A": "0", "B": "-1000", "C": "1000", "D": "-500"}, "correct_answer": "A"},
    {"id": 100, "difficulty": "hard", "question": "Simplify: 2500 - (-1500) - 1000 - (-500) - 2000", "options": {"A": "1500", "B": "2000", "C": "2500", "D": "3000"}, "correct_answer": "A"}
  ,
    {"id":101,"difficulty":"easy","question":"What is 6 − 9?","options":{"A":"3","B":"-3","C":"15","D":"-15"},"correct_answer":"B"},
    {"id":102,"difficulty":"easy","question":"Calculate: 0 − 7","options":{"A":"7","B":"-7","C":"0","D":"-14"},"correct_answer":"B"},
    {"id":103,"difficulty":"easy","question":"What is 11 − 4?","options":{"A":"15","B":"7","C":"-7","D":"-15"},"correct_answer":"B"},
    {"id":104,"difficulty":"easy","question":"Subtract: 5 − 12","options":{"A":"7","B":"-7","C":"17","D":"-17"},"correct_answer":"B"},
    {"id":105,"difficulty":"easy","question":"What is 20 − 30?","options":{"A":"10","B":"-10","C":"50","D":"-50"},"correct_answer":"B"},
    {"id":106,"difficulty":"easy","question":"Calculate: 9 − 0","options":{"A":"9","B":"0","C":"-9","D":"1"},"correct_answer":"A"},
    {"id":107,"difficulty":"easy","question":"What is 3 − 8?","options":{"A":"5","B":"-5","C":"11","D":"-11"},"correct_answer":"B"},
    {"id":108,"difficulty":"easy","question":"Subtract: 14 − 9","options":{"A":"23","B":"5","C":"-5","D":"-23"},"correct_answer":"B"},
    {"id":109,"difficulty":"easy","question":"What is 1 − 6?","options":{"A":"5","B":"-5","C":"7","D":"-7"},"correct_answer":"B"},
    {"id":110,"difficulty":"easy","question":"Calculate: 50 − 75","options":{"A":"25","B":"-25","C":"125","D":"-125"},"correct_answer":"B"},

    {"id":111,"difficulty":"medium","question":"What is (-4) − 9?","options":{"A":"5","B":"-5","C":"-13","D":"13"},"correct_answer":"C"},
    {"id":112,"difficulty":"medium","question":"Calculate: 7 − (-11)","options":{"A":"-4","B":"18","C":"-18","D":"4"},"correct_answer":"B"},
    {"id":113,"difficulty":"medium","question":"Subtract: (-20) − (-5)","options":{"A":"-15","B":"15","C":"-25","D":"25"},"correct_answer":"A"},
    {"id":114,"difficulty":"medium","question":"What is 0 − (-18)?","options":{"A":"-18","B":"18","C":"0","D":"36"},"correct_answer":"B"},
    {"id":115,"difficulty":"medium","question":"Calculate: (-9) − 14","options":{"A":"23","B":"-23","C":"5","D":"-5"},"correct_answer":"B"},
    {"id":116,"difficulty":"medium","question":"Subtract: 22 − (-8)","options":{"A":"14","B":"30","C":"-14","D":"-30"},"correct_answer":"B"},
    {"id":117,"difficulty":"medium","question":"What is (-35) − 15?","options":{"A":"-20","B":"-50","C":"20","D":"50"},"correct_answer":"B"},
    {"id":118,"difficulty":"medium","question":"Calculate: 16 − (-19)","options":{"A":"3","B":"35","C":"-35","D":"-3"},"correct_answer":"B"},
    {"id":119,"difficulty":"medium","question":"Subtract: (-7) − (-21)","options":{"A":"-28","B":"14","C":"28","D":"-14"},"correct_answer":"B"},
    {"id":120,"difficulty":"medium","question":"What is 48 − (-32)?","options":{"A":"16","B":"80","C":"-16","D":"-80"},"correct_answer":"B"},

    {"id":121,"difficulty":"medium","question":"Calculate: (-60) − (-40)","options":{"A":"-20","B":"20","C":"-100","D":"100"},"correct_answer":"A"},
    {"id":122,"difficulty":"medium","question":"What is 9 − (-27)?","options":{"A":"-18","B":"36","C":"18","D":"-36"},"correct_answer":"B"},
    {"id":123,"difficulty":"medium","question":"Subtract: (-18) − 22","options":{"A":"4","B":"-40","C":"40","D":"-4"},"correct_answer":"B"},
    {"id":124,"difficulty":"medium","question":"Calculate: 70 − (-45)","options":{"A":"25","B":"115","C":"-25","D":"-115"},"correct_answer":"B"},
    {"id":125,"difficulty":"medium","question":"What is (-5) − (-30)?","options":{"A":"-25","B":"25","C":"-35","D":"35"},"correct_answer":"B"},
    {"id":126,"difficulty":"medium","question":"Subtract: 0 − (-64)","options":{"A":"-64","B":"64","C":"0","D":"128"},"correct_answer":"B"},
    {"id":127,"difficulty":"medium","question":"Calculate: (-81) − 19","options":{"A":"-62","B":"-100","C":"62","D":"100"},"correct_answer":"B"},
    {"id":128,"difficulty":"medium","question":"What is 120 − (-80)?","options":{"A":"40","B":"200","C":"-40","D":"-200"},"correct_answer":"B"},
    {"id":129,"difficulty":"medium","question":"Subtract: (-44) − (-11)","options":{"A":"-33","B":"33","C":"-55","D":"55"},"correct_answer":"A"},
    {"id":130,"difficulty":"medium","question":"Calculate: 95 − (-105)","options":{"A":"10","B":"200","C":"-10","D":"-200"},"correct_answer":"B"},

    {"id":131,"difficulty":"hard","question":"What is the value of (-20) − 15 − (-5)?","options":{"A":"-30","B":"-40","C":"30","D":"40"},"correct_answer":"A"},
    {"id":132,"difficulty":"hard","question":"Simplify: 60 − (-35) − 25","options":{"A":"60","B":"70","C":"0","D":"20"},"correct_answer":"A"},
    {"id":133,"difficulty":"hard","question":"Calculate: (-45) − 30 − (-15)","options":{"A":"-60","B":"-90","C":"60","D":"90"},"correct_answer":"A"},
    {"id":134,"difficulty":"hard","question":"What is 100 − (-60) − 40?","options":{"A":"0","B":"100","C":"200","D":"120"},"correct_answer":"B"},
    {"id":135,"difficulty":"hard","question":"Simplify: (-70) − (-20) − 30","options":{"A":"-80","B":"-60","C":"60","D":"80"},"correct_answer":"A"},
    {"id":136,"difficulty":"hard","question":"Calculate: 0 − (-120) − 50","options":{"A":"-170","B":"70","C":"170","D":"-70"},"correct_answer":"B"},
    {"id":137,"difficulty":"hard","question":"What is (-90) − 25 − (-35)?","options":{"A":"-80","B":"-100","C":"80","D":"100"},"correct_answer":"A"},
    {"id":138,"difficulty":"hard","question":"Simplify: 150 − (-90) − 60","options":{"A":"0","B":"180","C":"300","D":"240"},"correct_answer":"B"},
    {"id":139,"difficulty":"hard","question":"Calculate: (-200) − (-120) − 40","options":{"A":"-120","B":"-80","C":"80","D":"120"},"correct_answer":"A"},
    {"id":140,"difficulty":"hard","question":"What is 300 − (-150) − 100?","options":{"A":"50","B":"350","C":"550","D":"250"},"correct_answer":"B"},

    {"id":141,"difficulty":"hard","question":"Simplify: (-250) − 100 − (-50)","options":{"A":"-300","B":"-200","C":"200","D":"300"},"correct_answer":"A"},
    {"id":142,"difficulty":"hard","question":"Calculate: 400 − (-200) − 150","options":{"A":"50","B":"250","C":"450","D":"750"},"correct_answer":"B"},
    {"id":143,"difficulty":"hard","question":"What is (-500) − (-300) − 100?","options":{"A":"-300","B":"-100","C":"100","D":"300"},"correct_answer":"A"},
    {"id":144,"difficulty":"hard","question":"Simplify: 600 − (-250) − 350","options":{"A":"0","B":"250","C":"500","D":"850"},"correct_answer":"A"},
    {"id":145,"difficulty":"hard","question":"Calculate: (-750) − 250 − (-500)","options":{"A":"-500","B":"-1000","C":"500","D":"1000"},"correct_answer":"A"},
    {"id":146,"difficulty":"hard","question":"What is 900 − (-450) − 300?","options":{"A":"150","B":"1050","C":"1650","D":"450"},"correct_answer":"B"},
    {"id":147,"difficulty":"hard","question":"Simplify: (-1000) − (-600) − 200","options":{"A":"-600","B":"-400","C":"400","D":"600"},"correct_answer":"A"},
    {"id":148,"difficulty":"hard","question":"Calculate: 1200 − (-800) − 600","options":{"A":"200","B":"800","C":"1400","D":"2600"},"correct_answer":"B"},
    {"id":149,"difficulty":"hard","question":"What is (-1500) − (-1000) − 300?","options":{"A":"-800","B":"-500","C":"500","D":"800"},"correct_answer":"A"},
    {"id":150,"difficulty":"hard","question":"Simplify: 2000 − (-1200) − 1500","options":{"A":"300","B":"1700","C":"3500","D":"700"},"correct_answer":"A"}
  ]
}