B Set 90 Unknown

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        "operation": "clock-math",
        "subject": "clock-math",
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            "clockMode": "hour",
            "maxNumber": 10
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        "problems": [
            {
                "id": 1,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 5:17 to 6:01?",
                "answer": 44,
                "correctAnswer": "44",
                "difficulty": "expert"
            },
            {
                "id": 2,
                "type": "clock-math",
                "subType": "add-time",
                "question": "65 minutes after 6:48 = ?",
                "answer": "7:53",
                "correctAnswer": "7:53",
                "difficulty": "expert"
            },
            {
                "id": 3,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 1:51 to 2:57?",
                "answer": 66,
                "correctAnswer": "66",
                "difficulty": "expert"
            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "52 minutes before 5:57 = ?",
                "answer": "5:05",
                "correctAnswer": "5:05",
                "difficulty": "expert"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "add-time",
                "question": "61 minutes after 8:09 = ?",
                "answer": "9:10",
                "correctAnswer": "9:10",
                "difficulty": "expert"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 7:18 to 7:31?",
                "answer": 13,
                "correctAnswer": "13",
                "difficulty": "expert"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "4 minutes before 11:53 = ?",
                "answer": "11:49",
                "correctAnswer": "11:49",
                "difficulty": "expert"
            },
            {
                "id": 8,
                "type": "clock-math",
                "subType": "add-time",
                "question": "43 minutes after 1:16 = ?",
                "answer": "1:59",
                "correctAnswer": "1:59",
                "difficulty": "expert"
            },
            {
                "id": 9,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 8:03 to 9:43?",
                "answer": 100,
                "correctAnswer": "100",
                "difficulty": "expert"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 7:28 to 9:25?",
                "answer": 117,
                "correctAnswer": "117",
                "difficulty": "expert"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 5, minute hand at 10 minutes]",
                "answer": "5:10",
                "correctAnswer": "5:10",
                "difficulty": "expert"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 9:04 to 10:23?",
                "answer": 79,
                "correctAnswer": "79",
                "difficulty": "expert"
            },
            {
                "id": 13,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 5:32 to 6:05?",
                "answer": 33,
                "correctAnswer": "33",
                "difficulty": "expert"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "37 minutes before 10:46 = ?",
                "answer": "10:09",
                "correctAnswer": "10:09",
                "difficulty": "expert"
            },
            {
                "id": 15,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "53 minutes before 5:55 = ?",
                "answer": "5:02",
                "correctAnswer": "5:02",
                "difficulty": "expert"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 3:57 to 5:03?",
                "answer": 66,
                "correctAnswer": "66",
                "difficulty": "expert"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 10:51 to 12:22?",
                "answer": 91,
                "correctAnswer": "91",
                "difficulty": "expert"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 4:25 to 6:09?",
                "answer": 104,
                "correctAnswer": "104",
                "difficulty": "expert"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 2, minute hand at 30 minutes]",
                "answer": "2:30",
                "correctAnswer": "2:30",
                "difficulty": "expert"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 7, minute hand at 38 minutes]",
                "answer": "7:38",
                "correctAnswer": "7:38",
                "difficulty": "expert"
            }
        ],
        "layout": {
            "columns": 2,
            "problemsPerPage": 20
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        "answerKey": true
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    "_archetype": "form-exercise",
    "_generatorId": "arithmetic-generator-v7.2.1"
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