Function Machine Addition Medium — Set 89

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                "rule": "×3 - 2",
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                "question": "Input: 2 → [×3 - 2] → ?",
                "answer": 4,
                "correctAnswer": "4",
                "difficulty": "medium"
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                "subType": "find-rule",
                "rule": "×3 - 2",
                "input": 6,
                "output": 16,
                "question": "Input: 6 → [?] → 16, what is the rule?",
                "answer": "×3 - 2",
                "correctAnswer": "×3 - 2",
                "difficulty": "medium"
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            {
                "id": 5,
                "type": "function-machine",
                "subType": "find-input",
                "rule": "-3",
                "input": 10,
                "output": 7,
                "question": "? → [-3] → 7",
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                "correctAnswer": "10",
                "difficulty": "medium"
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            {
                "id": 6,
                "type": "function-machine",
                "subType": "find-input",
                "rule": "×2 + 3",
                "input": 4,
                "output": 11,
                "question": "? → [×2 + 3] → 11",
                "answer": 4,
                "correctAnswer": "4",
                "difficulty": "medium"
            },
            {
                "id": 7,
                "type": "function-machine",
                "subType": "find-rule",
                "rule": "-1",
                "input": 8,
                "output": 7,
                "question": "Input: 8 → [?] → 7, what is the rule?",
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                "correctAnswer": "-1",
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                "id": 8,
                "type": "function-machine",
                "subType": "find-output",
                "rule": "×2 + 3",
                "input": 1,
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                "question": "Input: 1 → [×2 + 3] → ?",
                "answer": 5,
                "correctAnswer": "5",
                "difficulty": "medium"
            }
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    "_archetype": "form-exercise",
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