Number Chain Mixed Medium — Set 3

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            "id": 2,
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            "startNumber": 6,
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                    "op": "×",
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            "answer": 1,
            "correctAnswer": "1",
            "question": "Start at 3. Follow the chain: -2, +15, +6, ×2. What is the result after step 1?"
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                    "value": 8
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            "startNumber": 20,
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                    "value": 2
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            "missingStep": 2,
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            "startNumber": 28,
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