Time Time Difference Medium — Set 18

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        "problems": [
            {
                "id": 1,
                "type": "clock-math",
                "subType": "add-time",
                "question": "4 minutes after 7:57 = ?",
                "answer": "8:01",
                "correctAnswer": "8:01",
                "difficulty": "medium"
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                "id": 2,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 2, minute hand at 44 minutes]",
                "answer": "2:44",
                "correctAnswer": "2:44",
                "difficulty": "medium"
            },
            {
                "id": 3,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 5:21 to 6:44?",
                "answer": 83,
                "correctAnswer": "83",
                "difficulty": "medium"
            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 5:44 to 6:22?",
                "answer": 38,
                "correctAnswer": "38",
                "difficulty": "medium"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 12, minute hand at 15 minutes]",
                "answer": "12:15",
                "correctAnswer": "12:15",
                "difficulty": "medium"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "4 minutes before 12:59 = ?",
                "answer": "12:55",
                "correctAnswer": "12:55",
                "difficulty": "medium"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "56 minutes before 10:17 = ?",
                "answer": "9:21",
                "correctAnswer": "9:21",
                "difficulty": "medium"
            },
            {
                "id": 8,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 4, minute hand at 38 minutes]",
                "answer": "4:38",
                "correctAnswer": "4:38",
                "difficulty": "medium"
            },
            {
                "id": 9,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 9, minute hand at 14 minutes]",
                "answer": "9:14",
                "correctAnswer": "9:14",
                "difficulty": "medium"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "30 minutes before 10:38 = ?",
                "answer": "10:08",
                "correctAnswer": "10:08",
                "difficulty": "medium"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 7, minute hand at 6 minutes]",
                "answer": "7:06",
                "correctAnswer": "7:06",
                "difficulty": "medium"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "add-time",
                "question": "75 minutes after 8:36 = ?",
                "answer": "9:51",
                "correctAnswer": "9:51",
                "difficulty": "medium"
            },
            {
                "id": 13,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 8:33 to 8:50?",
                "answer": 17,
                "correctAnswer": "17",
                "difficulty": "medium"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "9 minutes before 6:22 = ?",
                "answer": "6:13",
                "correctAnswer": "6:13",
                "difficulty": "medium"
            },
            {
                "id": 15,
                "type": "clock-math",
                "subType": "add-time",
                "question": "52 minutes after 2:45 = ?",
                "answer": "3:37",
                "correctAnswer": "3:37",
                "difficulty": "medium"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "add-time",
                "question": "67 minutes after 3:07 = ?",
                "answer": "4:14",
                "correctAnswer": "4:14",
                "difficulty": "medium"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "add-time",
                "question": "83 minutes after 6:35 = ?",
                "answer": "7:58",
                "correctAnswer": "7:58",
                "difficulty": "medium"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "add-time",
                "question": "20 minutes after 5:42 = ?",
                "answer": "6:02",
                "correctAnswer": "6:02",
                "difficulty": "medium"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 10, minute hand at 2 minutes]",
                "answer": "10:02",
                "correctAnswer": "10:02",
                "difficulty": "medium"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "add-time",
                "question": "75 minutes after 2:57 = ?",
                "answer": "4:12",
                "correctAnswer": "4:12",
                "difficulty": "medium"
            }
        ],
        "layout": {
            "columns": 2,
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