Time Half Hour Hard — Set 24

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            "difficulty": "hard",
            "clockMode": "half-hour",
            "maxNumber": 10
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        "problems": [
            {
                "id": 1,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 10:52 to 11:17?",
                "answer": 25,
                "correctAnswer": "25",
                "difficulty": "hard"
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            {
                "id": 2,
                "type": "clock-math",
                "subType": "add-time",
                "question": "50 minutes after 2:25 = ?",
                "answer": "3:15",
                "correctAnswer": "3:15",
                "difficulty": "hard"
            },
            {
                "id": 3,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 5:02 to 6:13?",
                "answer": 71,
                "correctAnswer": "71",
                "difficulty": "hard"
            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "add-time",
                "question": "32 minutes after 3:09 = ?",
                "answer": "3:41",
                "correctAnswer": "3:41",
                "difficulty": "hard"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 11, minute hand at 45 minutes]",
                "answer": "11:45",
                "correctAnswer": "11:45",
                "difficulty": "hard"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "27 minutes before 5:02 = ?",
                "answer": "4:35",
                "correctAnswer": "4:35",
                "difficulty": "hard"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 10:16 to 10:34?",
                "answer": 18,
                "correctAnswer": "18",
                "difficulty": "hard"
            },
            {
                "id": 8,
                "type": "clock-math",
                "subType": "add-time",
                "question": "71 minutes after 9:31 = ?",
                "answer": "10:42",
                "correctAnswer": "10:42",
                "difficulty": "hard"
            },
            {
                "id": 9,
                "type": "clock-math",
                "subType": "add-time",
                "question": "12 minutes after 2:01 = ?",
                "answer": "2:13",
                "correctAnswer": "2:13",
                "difficulty": "hard"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 2:04 to 2:34?",
                "answer": 30,
                "correctAnswer": "30",
                "difficulty": "hard"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 7, minute hand at 35 minutes]",
                "answer": "7:35",
                "correctAnswer": "7:35",
                "difficulty": "hard"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "22 minutes before 6:30 = ?",
                "answer": "6:08",
                "correctAnswer": "6:08",
                "difficulty": "hard"
            },
            {
                "id": 13,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 3:06 to 4:31?",
                "answer": 85,
                "correctAnswer": "85",
                "difficulty": "hard"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "add-time",
                "question": "24 minutes after 4:19 = ?",
                "answer": "4:43",
                "correctAnswer": "4:43",
                "difficulty": "hard"
            },
            {
                "id": 15,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "35 minutes before 6:47 = ?",
                "answer": "6:12",
                "correctAnswer": "6:12",
                "difficulty": "hard"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 1, minute hand at 2 minutes]",
                "answer": "1:02",
                "correctAnswer": "1:02",
                "difficulty": "hard"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "add-time",
                "question": "24 minutes after 11:40 = ?",
                "answer": "12:04",
                "correctAnswer": "12:04",
                "difficulty": "hard"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 12, minute hand at 38 minutes]",
                "answer": "12:38",
                "correctAnswer": "12:38",
                "difficulty": "hard"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 11:17 to 12:38?",
                "answer": 81,
                "correctAnswer": "81",
                "difficulty": "hard"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "add-time",
                "question": "88 minutes after 10:04 = ?",
                "answer": "11:32",
                "correctAnswer": "11:32",
                "difficulty": "hard"
            }
        ],
        "layout": {
            "columns": 2,
            "problemsPerPage": 20
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