B Set 20 Unknown

This page uses a content type that does not have a custom renderer yet. Raw structured data is shown below.

{
    "contentData": {
        "operation": "clock-math",
        "subject": "clock-math",
        "difficulty": "medium",
        "config": {
            "clockMode": "elapsed-time",
            "maxNumber": 10
        },
        "problems": [
            {
                "id": 1,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "25 minutes before 10:30 = ?",
                "answer": "10:05",
                "correctAnswer": "10:05",
                "difficulty": "normal"
            },
            {
                "id": 2,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "45 minutes before 11:50 = ?",
                "answer": "11:05",
                "correctAnswer": "11:05",
                "difficulty": "normal"
            },
            {
                "id": 3,
                "type": "clock-math",
                "subType": "add-time",
                "question": "75 minutes after 5:20 = ?",
                "answer": "6:35",
                "correctAnswer": "6:35",
                "difficulty": "normal"
            },
            {
                "id": 4,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "30 minutes before 9:15 = ?",
                "answer": "8:45",
                "correctAnswer": "8:45",
                "difficulty": "normal"
            },
            {
                "id": 5,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "35 minutes before 8:50 = ?",
                "answer": "8:15",
                "correctAnswer": "8:15",
                "difficulty": "normal"
            },
            {
                "id": 6,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "50 minutes before 6:10 = ?",
                "answer": "5:20",
                "correctAnswer": "5:20",
                "difficulty": "normal"
            },
            {
                "id": 7,
                "type": "clock-math",
                "subType": "add-time",
                "question": "85 minutes after 3:45 = ?",
                "answer": "5:10",
                "correctAnswer": "5:10",
                "difficulty": "normal"
            },
            {
                "id": 8,
                "type": "clock-math",
                "subType": "add-time",
                "question": "80 minutes after 3:40 = ?",
                "answer": "5:00",
                "correctAnswer": "5:00",
                "difficulty": "normal"
            },
            {
                "id": 9,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 9:50 to 11:50?",
                "answer": 120,
                "correctAnswer": "120",
                "difficulty": "normal"
            },
            {
                "id": 10,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "45 minutes before 8:20 = ?",
                "answer": "7:35",
                "correctAnswer": "7:35",
                "difficulty": "normal"
            },
            {
                "id": 11,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 9, minute hand at 15 minutes]",
                "answer": "9:15",
                "correctAnswer": "9:15",
                "difficulty": "normal"
            },
            {
                "id": 12,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 7:05 to 7:15?",
                "answer": 10,
                "correctAnswer": "10",
                "difficulty": "normal"
            },
            {
                "id": 13,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 6:15 to 8:00?",
                "answer": 105,
                "correctAnswer": "105",
                "difficulty": "normal"
            },
            {
                "id": 14,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 3:30 to 5:30?",
                "answer": 120,
                "correctAnswer": "120",
                "difficulty": "normal"
            },
            {
                "id": 15,
                "type": "clock-math",
                "subType": "add-time",
                "question": "20 minutes after 2:05 = ?",
                "answer": "2:25",
                "correctAnswer": "2:25",
                "difficulty": "normal"
            },
            {
                "id": 16,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 7:40 to 9:00?",
                "answer": 80,
                "correctAnswer": "80",
                "difficulty": "normal"
            },
            {
                "id": 17,
                "type": "clock-math",
                "subType": "subtract-time",
                "question": "30 minutes before 6:45 = ?",
                "answer": "6:15",
                "correctAnswer": "6:15",
                "difficulty": "normal"
            },
            {
                "id": 18,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 10:35 to 12:05?",
                "answer": 90,
                "correctAnswer": "90",
                "difficulty": "normal"
            },
            {
                "id": 19,
                "type": "clock-math",
                "subType": "read-time",
                "question": "What time is shown on the clock? [hour hand near 2, minute hand at 50 minutes]",
                "answer": "2:50",
                "correctAnswer": "2:50",
                "difficulty": "normal"
            },
            {
                "id": 20,
                "type": "clock-math",
                "subType": "elapsed-time",
                "question": "How many minutes from 3:55 to 4:25?",
                "answer": 30,
                "correctAnswer": "30",
                "difficulty": "normal"
            }
        ],
        "layout": {
            "columns": 2,
            "problemsPerPage": 20
        }
    },
    "outputTargets": {
        "screen": true,
        "print": true,
        "pdf": true,
        "answerKey": true
    },
    "_archetype": "form-exercise",
    "_generatorId": "arithmetic-generator-v7.2.1"
}