Clock Math Quarter Hour Hard — Set 86

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        "config": {
            "difficulty": "hard",
            "clockMode": "quarter-hour",
            "maxNumber": 10
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        "problems": [
            {
                "id": 1,
                "type": "clock-math",
                "subType": "add-time",
                "question": "34 minutes after 6:34 = ?",
                "answer": "7:08",
                "correctAnswer": "7:08",
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            },
            {
                "id": 2,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 8, minute hand at 26 minutes]",
                "answer": "8:26",
                "correctAnswer": "8:26",
                "difficulty": "hard"
            },
            {
                "id": 3,
                "type": "clock-math",
                "subType": "add-time",
                "question": "3 minutes after 3:47 = ?",
                "answer": "3:50",
                "correctAnswer": "3:50",
                "difficulty": "hard"
            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 11:33 to 11:35?",
                "answer": 2,
                "correctAnswer": "2",
                "difficulty": "hard"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "add-time",
                "question": "43 minutes after 10:05 = ?",
                "answer": "10:48",
                "correctAnswer": "10:48",
                "difficulty": "hard"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "add-time",
                "question": "60 minutes after 4:24 = ?",
                "answer": "5:24",
                "correctAnswer": "5:24",
                "difficulty": "hard"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 8, minute hand at 48 minutes]",
                "answer": "8:48",
                "correctAnswer": "8:48",
                "difficulty": "hard"
            },
            {
                "id": 8,
                "type": "clock-math",
                "subType": "add-time",
                "question": "32 minutes after 4:01 = ?",
                "answer": "4:33",
                "correctAnswer": "4:33",
                "difficulty": "hard"
            },
            {
                "id": 9,
                "type": "clock-math",
                "subType": "add-time",
                "question": "51 minutes after 4:16 = ?",
                "answer": "5:07",
                "correctAnswer": "5:07",
                "difficulty": "hard"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "15 minutes before 2:40 = ?",
                "answer": "2:25",
                "correctAnswer": "2:25",
                "difficulty": "hard"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 1:55 to 3:14?",
                "answer": 79,
                "correctAnswer": "79",
                "difficulty": "hard"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "add-time",
                "question": "24 minutes after 1:52 = ?",
                "answer": "2:16",
                "correctAnswer": "2:16",
                "difficulty": "hard"
            },
            {
                "id": 13,
                "type": "clock-math",
                "subType": "add-time",
                "question": "24 minutes after 11:49 = ?",
                "answer": "12:13",
                "correctAnswer": "12:13",
                "difficulty": "hard"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "add-time",
                "question": "90 minutes after 6:40 = ?",
                "answer": "8:10",
                "correctAnswer": "8:10",
                "difficulty": "hard"
            },
            {
                "id": 15,
                "type": "clock-math",
                "subType": "add-time",
                "question": "6 minutes after 9:02 = ?",
                "answer": "9:08",
                "correctAnswer": "9:08",
                "difficulty": "hard"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "53 minutes before 9:45 = ?",
                "answer": "8:52",
                "correctAnswer": "8:52",
                "difficulty": "hard"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 2:49 to 4:30?",
                "answer": 101,
                "correctAnswer": "101",
                "difficulty": "hard"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 3, minute hand at 4 minutes]",
                "answer": "3:04",
                "correctAnswer": "3:04",
                "difficulty": "hard"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 9:03 to 10:35?",
                "answer": 92,
                "correctAnswer": "92",
                "difficulty": "hard"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "38 minutes before 9:36 = ?",
                "answer": "8:58",
                "correctAnswer": "8:58",
                "difficulty": "hard"
            }
        ],
        "layout": {
            "columns": 2,
            "problemsPerPage": 20
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    "_archetype": "form-exercise",
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