Clock Math Quarter Hour Easy — Set 11

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        "subject": "clock-math",
        "difficulty": "easy",
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            "difficulty": "easy",
            "clockMode": "quarter-hour",
            "maxNumber": 10
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        "problems": [
            {
                "id": 1,
                "type": "clock-math",
                "subType": "add-time",
                "question": "30 minutes after 4:45 = ?",
                "answer": "5:15",
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                "question": "45 minutes before 9:45 = ?",
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                "question": "15 minutes before 5:45 = ?",
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            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 5, minute hand at 30 minutes]",
                "answer": "5:30",
                "correctAnswer": "5:30",
                "difficulty": "easy"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 11:45 to 12:15?",
                "answer": 30,
                "correctAnswer": "30",
                "difficulty": "easy"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 7:45 to 9:15?",
                "answer": 90,
                "correctAnswer": "90",
                "difficulty": "easy"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "60 minutes before 5:15 = ?",
                "answer": "4:15",
                "correctAnswer": "4:15",
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            {
                "id": 8,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 8:00 to 9:30?",
                "answer": 90,
                "correctAnswer": "90",
                "difficulty": "easy"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "15 minutes before 4:30 = ?",
                "answer": "4:15",
                "correctAnswer": "4:15",
                "difficulty": "easy"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 6:45 to 7:15?",
                "answer": 30,
                "correctAnswer": "30",
                "difficulty": "easy"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 3:00 to 4:00?",
                "answer": 60,
                "correctAnswer": "60",
                "difficulty": "easy"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [10 o'clock]",
                "answer": "10:00",
                "correctAnswer": "10:00",
                "difficulty": "easy"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 1:00 to 1:30?",
                "answer": 30,
                "correctAnswer": "30",
                "difficulty": "easy"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 4:00 to 5:15?",
                "answer": 75,
                "correctAnswer": "75",
                "difficulty": "easy"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [9 o'clock]",
                "answer": "9:00",
                "correctAnswer": "9:00",
                "difficulty": "easy"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "30 minutes before 8:15 = ?",
                "answer": "7:45",
                "correctAnswer": "7:45",
                "difficulty": "easy"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 11:30 to 12:30?",
                "answer": 60,
                "correctAnswer": "60",
                "difficulty": "easy"
            }
        ],
        "layout": {
            "columns": 2,
            "problemsPerPage": 20
        }
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