Time Elapsed Time Grade 3 — Set 31

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        "subject": "clock-math",
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        "problems": [
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                "id": 1,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 7:35 to 8:15?",
                "answer": 40,
                "correctAnswer": "40",
                "difficulty": "normal"
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            {
                "id": 2,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 10:30 to 10:50?",
                "answer": 20,
                "correctAnswer": "20",
                "difficulty": "normal"
            },
            {
                "id": 3,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "30 minutes before 3:30 = ?",
                "answer": "3:00",
                "correctAnswer": "3:00",
                "difficulty": "normal"
            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 10:20 to 10:45?",
                "answer": 25,
                "correctAnswer": "25",
                "difficulty": "normal"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 11, minute hand at 40 minutes]",
                "answer": "11:40",
                "correctAnswer": "11:40",
                "difficulty": "normal"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 6:20 to 7:00?",
                "answer": 40,
                "correctAnswer": "40",
                "difficulty": "normal"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 12, minute hand at 40 minutes]",
                "answer": "12:40",
                "correctAnswer": "12:40",
                "difficulty": "normal"
            },
            {
                "id": 8,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "35 minutes before 10:15 = ?",
                "answer": "9:40",
                "correctAnswer": "9:40",
                "difficulty": "normal"
            },
            {
                "id": 9,
                "type": "clock-math",
                "subType": "add-time",
                "question": "35 minutes after 11:40 = ?",
                "answer": "12:15",
                "correctAnswer": "12:15",
                "difficulty": "normal"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 2:20 to 3:45?",
                "answer": 85,
                "correctAnswer": "85",
                "difficulty": "normal"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "5 minutes before 11:10 = ?",
                "answer": "11:05",
                "correctAnswer": "11:05",
                "difficulty": "normal"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "add-time",
                "question": "70 minutes after 7:50 = ?",
                "answer": "9:00",
                "correctAnswer": "9:00",
                "difficulty": "normal"
            },
            {
                "id": 13,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "5 minutes before 2:15 = ?",
                "answer": "2:10",
                "correctAnswer": "2:10",
                "difficulty": "normal"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "15 minutes before 3:15 = ?",
                "answer": "3:00",
                "correctAnswer": "3:00",
                "difficulty": "normal"
            },
            {
                "id": 15,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "10 minutes before 12:25 = ?",
                "answer": "12:15",
                "correctAnswer": "12:15",
                "difficulty": "normal"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "25 minutes before 7:55 = ?",
                "answer": "7:30",
                "correctAnswer": "7:30",
                "difficulty": "normal"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "add-time",
                "question": "60 minutes after 1:30 = ?",
                "answer": "2:30",
                "correctAnswer": "2:30",
                "difficulty": "normal"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "55 minutes before 5:35 = ?",
                "answer": "4:40",
                "correctAnswer": "4:40",
                "difficulty": "normal"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "add-time",
                "question": "5 minutes after 5:50 = ?",
                "answer": "5:55",
                "correctAnswer": "5:55",
                "difficulty": "normal"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "40 minutes before 2:05 = ?",
                "answer": "1:25",
                "correctAnswer": "1:25",
                "difficulty": "normal"
            }
        ],
        "layout": {
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