{
  "title": "Estimating Cube Roots (Cubes and Cube Roots) - Grade 8 CBSE",
  "total_questions": 60,
  "questions": [

    {"id": 1, "difficulty": "easy", "question": "Cube root of 8 is closest to?", "options": {"A": "2", "B": "3", "C": "1", "D": "4"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "Cube root of 27 is closest to?", "options": {"A": "3", "B": "4", "C": "2", "D": "5"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Cube root of 64 is closest to?", "options": {"A": "4", "B": "3", "C": "5", "D": "2"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "Cube root of 125 is closest to?", "options": {"A": "5", "B": "4", "C": "6", "D": "3"}, "correct_answer": "D"},
    {"id": 5, "difficulty": "easy", "question": "Cube root of 1 is closest to?", "options": {"A": "1", "B": "2", "C": "0", "D": "3"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "Which number is closest to cube of 6?", "options": {"A": "216", "B": "125", "C": "343", "D": "64"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "Cube root of 100 is between:", "options": {"A": "4 and 5", "B": "3 and 4", "C": "2 and 3", "D": "5 and 6"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "Cube root of 300 is between:", "options": {"A": "6 and 7", "B": "5 and 6", "C": "4 and 5", "D": "3 and 4"}, "correct_answer": "D"},
    {"id": 9, "difficulty": "easy", "question": "Which is a perfect cube?", "options": {"A": "64", "B": "50", "C": "70", "D": "90"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "Cube root of 10 is closest to:", "options": {"A": "2", "B": "1", "C": "3", "D": "4"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Cube root of 20 is closest to:", "options": {"A": "3", "B": "2", "C": "4", "D": "1"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Cube root of 50 is between:", "options": {"A": "3 and 4", "B": "4 and 5", "C": "5 and 6", "D": "2 and 3"}, "correct_answer": "D"},
    {"id": 13, "difficulty": "easy", "question": "Cube of 3 is:", "options": {"A": "27", "B": "9", "C": "18", "D": "36"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "Cube of 5 is:", "options": {"A": "125", "B": "100", "C": "225", "D": "75"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Cube root of 200 is between:", "options": {"A": "5 and 6", "B": "6 and 7", "C": "4 and 5", "D": "3 and 4"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "Cube root of 350 is between:", "options": {"A": "7 and 8", "B": "6 and 7", "C": "5 and 6", "D": "4 and 5"}, "correct_answer": "D"},
    {"id": 17, "difficulty": "easy", "question": "Which number is the cube of 7?", "options": {"A": "343", "B": "512", "C": "216", "D": "125"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Cube of 2 is:", "options": {"A": "8", "B": "6", "C": "4", "D": "10"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "Cube root of 500 is between:", "options": {"A": "7 and 8", "B": "8 and 9", "C": "6 and 7", "D": "5 and 6"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "Cube root of 1000 is:", "options": {"A": "10", "B": "9", "C": "8", "D": "7"}, "correct_answer": "D"},

    {"id": 21, "difficulty": "medium", "question": "Cube root of 729 is closest to:", "options": {"A": "9", "B": "8", "C": "10", "D": "7"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Cube root of 1500 is between:", "options": {"A": "11 and 12", "B": "10 and 11", "C": "9 and 10", "D": "8 and 9"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "Cube root of 2744 is:", "options": {"A": "14", "B": "13", "C": "15", "D": "12"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "Estimate cube root of 5000:", "options": {"A": "17", "B": "18", "C": "19", "D": "20"}, "correct_answer": "D"},
    {"id": 25, "difficulty": "medium", "question": "Which is closest to cube root of 4000?", "options": {"A": "16", "B": "15", "C": "17", "D": "18"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "Cube root of 274 is between:", "options": {"A": "6 and 7", "B": "7 and 8", "C": "5 and 6", "D": "4 and 5"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Cube root of 999 is between:", "options": {"A": "9 and 10", "B": "8 and 9", "C": "7 and 8", "D": "10 and 11"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "Closest perfect cube to 3000 is:", "options": {"A": "2197", "B": "2744", "C": "3375", "D": "4096"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "Cube root of 2400 is closest to:", "options": {"A": "13", "B": "12", "C": "14", "D": "15"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "Cube root of 512 =", "options": {"A": "8", "B": "7", "C": "9", "D": "10"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "Cube root of 3375 is:", "options": {"A": "15", "B": "14", "C": "16", "D": "17"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "Cube root of 4913:", "options": {"A": "17", "B": "16", "C": "18", "D": "19"}, "correct_answer": "A"},
    {"id": 33, "difficulty": "medium", "question": "Cube root of 4096 is:", "options": {"A": "16", "B": "15", "C": "17", "D": "18"}, "correct_answer": "B"},
    {"id": 34, "difficulty": "medium", "question": "Cube root of 8000 is:", "options": {"A": "20", "B": "19", "C": "21", "D": "22"}, "correct_answer": "C"},
    {"id": 35, "difficulty": "medium", "question": "Cube root of 6859 is:", "options": {"A": "19", "B": "18", "C": "20", "D": "21"}, "correct_answer": "A"},
    {"id": 36, "difficulty": "medium", "question": "Cube root of 4913 is close to:", "options": {"A": "17", "B": "16", "C": "18", "D": "19"}, "correct_answer": "B"},
    {"id": 37, "difficulty": "medium", "question": "Cube root of 10000 is closest to:", "options": {"A": "21", "B": "22", "C": "20", "D": "23"}, "correct_answer": "C"},
    {"id": 38, "difficulty": "medium", "question": "Cube root of 9261 = ?", "options": {"A": "21", "B": "22", "C": "20", "D": "19"}, "correct_answer": "D"},
    {"id": 39, "difficulty": "medium", "question": "Cube root of 2744 =", "options": {"A": "14", "B": "13", "C": "15", "D": "12"}, "correct_answer": "A"},
    {"id": 40, "difficulty": "medium", "question": "Cube root of 5832 =", "options": {"A": "18", "B": "17", "C": "19", "D": "20"}, "correct_answer": "B"},


    {"id": 41, "difficulty": "hard", "question": "Estimate cube root of 12000:", "options": {"A": "22", "B": "23", "C": "24", "D": "21"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "Cube root of 15625 =", "options": {"A": "25", "B": "24", "C": "26", "D": "23"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "Cube root of 25000 is closest to:", "options": {"A": "29", "B": "30", "C": "31", "D": "28"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "Cube root of 64000 =", "options": {"A": "40", "B": "35", "C": "32", "D": "45"}, "correct_answer": "D"},
    {"id": 45, "difficulty": "hard", "question": "Cube root of 39304 is close to:", "options": {"A": "34", "B": "35", "C": "36", "D": "33"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "The cube root of 50653 =", "options": {"A": "37", "B": "38", "C": "36", "D": "35"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "Cube root of 42875 =", "options": {"A": "35", "B": "36", "C": "34", "D": "37"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "Cube root of 68921 =", "options": {"A": "41", "B": "40", "C": "42", "D": "43"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "hard", "question": "Cube root of 79507 =", "options": {"A": "43", "B": "44", "C": "45", "D": "42"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "Cube root of 103823 =", "options": {"A": "48", "B": "47", "C": "49", "D": "46"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "hard", "question": "Cube root of 117649 =", "options": {"A": "49", "B": "48", "C": "50", "D": "51"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "Cube root of 140608 =", "options": {"A": "51", "B": "52", "C": "50", "D": "53"}, "correct_answer": "D"},
    {"id": 53, "difficulty": "hard", "question": "Cube root of 175616 =", "options": {"A": "56", "B": "55", "C": "54", "D": "57"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "Cube root of 226981 =", "options": {"A": "58", "B": "59", "C": "60", "D": "61"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "Cube root of 300763 =", "options": {"A": "67", "B": "66", "C": "68", "D": "69"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "Cube root of 373248 =", "options": {"A": "72", "B": "71", "C": "70", "D": "73"}, "correct_answer": "D"},
    {"id": 57, "difficulty": "hard", "question": "Cube root of 456533 =", "options": {"A": "76", "B": "77", "C": "78", "D": "75"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "Cube root of 551368 =", "options": {"A": "80", "B": "79", "C": "81", "D": "82"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Cube root of 658503 =", "options": {"A": "87", "B": "86", "C": "85", "D": "88"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "Cube root of 804357 =", "options": {"A": "93", "B": "94", "C": "92", "D": "91"}, "correct_answer": "D"}

  ]
}