B Set 59 Unknown

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                "question": "4 __ 2 = 2",
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                "question": "13 __ 4 = 9",
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                "operand1": 7,
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                "id": 19,
                "type": "missing-operator",
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                "operand2": 8,
                "result": 24,
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                "id": 20,
                "type": "missing-operator",
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                "operand1": 6,
                "operand2": 10,
                "result": 16,
                "question": "6 ○ 10 = 16, what is ○?",
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