Time Time Difference Hard — Set 90

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    "contentData": {
        "operation": "clock-math",
        "subject": "clock-math",
        "difficulty": "hard",
        "config": {
            "difficulty": "hard",
            "clockMode": "hour",
            "maxNumber": 10
        },
        "problems": [
            {
                "id": 1,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 1, minute hand at 54 minutes]",
                "answer": "1:54",
                "correctAnswer": "1:54",
                "difficulty": "hard"
            },
            {
                "id": 2,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "29 minutes before 2:39 = ?",
                "answer": "2:10",
                "correctAnswer": "2:10",
                "difficulty": "hard"
            },
            {
                "id": 3,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 10, minute hand at 15 minutes]",
                "answer": "10:15",
                "correctAnswer": "10:15",
                "difficulty": "hard"
            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 5, minute hand at 37 minutes]",
                "answer": "5:37",
                "correctAnswer": "5:37",
                "difficulty": "hard"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 8:39 to 9:47?",
                "answer": 68,
                "correctAnswer": "68",
                "difficulty": "hard"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "13 minutes before 2:17 = ?",
                "answer": "2:04",
                "correctAnswer": "2:04",
                "difficulty": "hard"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 8:49 to 8:51?",
                "answer": 2,
                "correctAnswer": "2",
                "difficulty": "hard"
            },
            {
                "id": 8,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 9:49 to 11:14?",
                "answer": 85,
                "correctAnswer": "85",
                "difficulty": "hard"
            },
            {
                "id": 9,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 4:39 to 5:48?",
                "answer": 69,
                "correctAnswer": "69",
                "difficulty": "hard"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 1:04 to 1:38?",
                "answer": 34,
                "correctAnswer": "34",
                "difficulty": "hard"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 6:39 to 7:38?",
                "answer": 59,
                "correctAnswer": "59",
                "difficulty": "hard"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "37 minutes before 11:46 = ?",
                "answer": "11:09",
                "correctAnswer": "11:09",
                "difficulty": "hard"
            },
            {
                "id": 13,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 12, minute hand at 34 minutes]",
                "answer": "12:34",
                "correctAnswer": "12:34",
                "difficulty": "hard"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "add-time",
                "question": "78 minutes after 2:45 = ?",
                "answer": "4:03",
                "correctAnswer": "4:03",
                "difficulty": "hard"
            },
            {
                "id": 15,
                "type": "clock-math",
                "subType": "add-time",
                "question": "27 minutes after 2:46 = ?",
                "answer": "3:13",
                "correctAnswer": "3:13",
                "difficulty": "hard"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "32 minutes before 5:46 = ?",
                "answer": "5:14",
                "correctAnswer": "5:14",
                "difficulty": "hard"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 1, minute hand at 55 minutes]",
                "answer": "1:55",
                "correctAnswer": "1:55",
                "difficulty": "hard"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 2, minute hand at 36 minutes]",
                "answer": "2:36",
                "correctAnswer": "2:36",
                "difficulty": "hard"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 1:52 to 2:10?",
                "answer": 18,
                "correctAnswer": "18",
                "difficulty": "hard"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "35 minutes before 8:28 = ?",
                "answer": "7:53",
                "correctAnswer": "7:53",
                "difficulty": "hard"
            }
        ],
        "layout": {
            "columns": 2,
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    "_archetype": "form-exercise",
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