Time Half Hour Hard — Set 8

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    "title": "form-exercise set 8",
    "operation": "clock-math",
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    "difficulty": "hard",
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        "clockMode": "half-hour",
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                "altText": "Clock showing 1:00"
            }
        },
        {
            "id": 3,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 1:30. Subtract 180 minutes. What time is it?",
            "answer": "10:30",
            "startTime": "1:30",
            "delta": -180,
            "task": "elapsed-time",
            "correctAnswer": "10:30",
            "visual": {
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                "altText": "Clock showing 1:30"
            }
        },
        {
            "id": 4,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 6:30. Add 60 minutes. What time is it?",
            "answer": "7:30",
            "startTime": "6:30",
            "delta": 60,
            "task": "elapsed-time",
            "correctAnswer": "7:30",
            "visual": {
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                "altText": "Clock showing 6:30"
            }
        },
        {
            "id": 5,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 2:30. Subtract 240 minutes. What time is it?",
            "answer": "10:30",
            "startTime": "2:30",
            "delta": -240,
            "task": "elapsed-time",
            "correctAnswer": "10:30",
            "visual": {
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                "altText": "Clock showing 2:30"
            }
        },
        {
            "id": 6,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 1:30. Add 180 minutes. What time is it?",
            "answer": "4:30",
            "startTime": "1:30",
            "delta": 180,
            "task": "elapsed-time",
            "correctAnswer": "4:30",
            "visual": {
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                "altText": "Clock showing 1:30"
            }
        },
        {
            "id": 7,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 9:00. Add 90 minutes. What time is it?",
            "answer": "10:30",
            "startTime": "9:00",
            "delta": 90,
            "task": "elapsed-time",
            "correctAnswer": "10:30",
            "visual": {
                "type": "inline-svg",
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                "altText": "Clock showing 9:00"
            }
        },
        {
            "id": 8,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 4:30. Subtract 180 minutes. What time is it?",
            "answer": "1:30",
            "startTime": "4:30",
            "delta": -180,
            "task": "elapsed-time",
            "correctAnswer": "1:30",
            "visual": {
                "type": "inline-svg",
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                "altText": "Clock showing 4:30"
            }
        },
        {
            "id": 9,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 10:30. Add 240 minutes. What time is it?",
            "answer": "2:30",
            "startTime": "10:30",
            "delta": 240,
            "task": "elapsed-time",
            "correctAnswer": "2:30",
            "visual": {
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                "altText": "Clock showing 10:30"
            }
        },
        {
            "id": 10,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 2:30. Add 270 minutes. What time is it?",
            "answer": "7:00",
            "startTime": "2:30",
            "delta": 270,
            "task": "elapsed-time",
            "correctAnswer": "7:00",
            "visual": {
                "type": "inline-svg",
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                "altText": "Clock showing 2:30"
            }
        },
        {
            "id": 11,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 4:00. Subtract 150 minutes. What time is it?",
            "answer": "1:30",
            "startTime": "4:00",
            "delta": -150,
            "task": "elapsed-time",
            "correctAnswer": "1:30",
            "visual": {
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                "altText": "Clock showing 4:00"
            }
        },
        {
            "id": 12,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 11:30. Subtract 210 minutes. What time is it?",
            "answer": "8:00",
            "startTime": "11:30",
            "delta": -210,
            "task": "elapsed-time",
            "correctAnswer": "8:00",
            "visual": {
                "type": "inline-svg",
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                "altText": "Clock showing 11:30"
            }
        },
        {
            "id": 13,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 3:00. Subtract 60 minutes. What time is it?",
            "answer": "2:00",
            "startTime": "3:00",
            "delta": -60,
            "task": "elapsed-time",
            "correctAnswer": "2:00",
            "visual": {
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                "altText": "Clock showing 3:00"
            }
        },
        {
            "id": 14,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 8:30. Subtract 270 minutes. What time is it?",
            "answer": "4:00",
            "startTime": "8:30",
            "delta": -270,
            "task": "elapsed-time",
            "correctAnswer": "4:00",
            "visual": {
                "type": "inline-svg",
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                "altText": "Clock showing 8:30"
            }
        },
        {
            "id": 15,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 8:30. Add 90 minutes. What time is it?",
            "answer": "10:00",
            "startTime": "8:30",
            "delta": 90,
            "task": "elapsed-time",
            "correctAnswer": "10:00",
            "visual": {
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                "altText": "Clock showing 8:30"
            }
        },
        {
            "id": 16,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 11:30. Subtract 90 minutes. What time is it?",
            "answer": "10:00",
            "startTime": "11:30",
            "delta": -90,
            "task": "elapsed-time",
            "correctAnswer": "10:00",
            "visual": {
                "type": "inline-svg",
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                "altText": "Clock showing 11:30"
            }
        },
        {
            "id": 17,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 5:30. Subtract 270 minutes. What time is it?",
            "answer": "1:00",
            "startTime": "5:30",
            "delta": -270,
            "task": "elapsed-time",
            "correctAnswer": "1:00",
            "visual": {
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                "altText": "Clock showing 5:30"
            }
        },
        {
            "id": 18,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 7:30. Add 90 minutes. What time is it?",
            "answer": "9:00",
            "startTime": "7:30",
            "delta": 90,
            "task": "elapsed-time",
            "correctAnswer": "9:00",
            "visual": {
                "type": "inline-svg",
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                "altText": "Clock showing 7:30"
            }
        },
        {
            "id": 19,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 10:30. Add 240 minutes. What time is it?",
            "answer": "2:30",
            "startTime": "10:30",
            "delta": 240,
            "task": "elapsed-time",
            "correctAnswer": "2:30",
            "visual": {
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                "altText": "Clock showing 10:30"
            }
        },
        {
            "id": 20,
            "type": "clock-math",
            "mode": "half-hour",
            "difficulty": "hard",
            "question": "Start at 9:00. Add 30 minutes. What time is it?",
            "answer": "9:30",
            "startTime": "9:00",
            "delta": 30,
            "task": "elapsed-time",
            "correctAnswer": "9:30",
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