Number Chain Mixed Medium — Set 21

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        "subject": "arithmetic",
        "difficulty": "medium",
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                "subType": "number-chain",
                "start": 7,
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                    {
                        "op": "+",
                        "operand": 2
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                        "op": "-",
                        "operand": 6
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                        "op": "-",
                        "operand": 2
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                "answer": 3,
                "question": "Number Chain: 7 → +2 → -6 → -2 → +2 → ?",
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                "type": "number-chain",
                "subType": "number-chain",
                "start": 10,
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                        "operand": 10
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                        "op": "-",
                        "operand": 27
                    },
                    {
                        "op": "x",
                        "operand": 2
                    }
                ],
                "answer": 6,
                "question": "Number Chain: 10 → x2 → +10 → -27 → x2 → ?",
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            },
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                "type": "number-chain",
                "subType": "number-chain",
                "start": 6,
                "steps": [
                    {
                        "op": "-",
                        "operand": 4
                    },
                    {
                        "op": "+",
                        "operand": 7
                    },
                    {
                        "op": "+",
                        "operand": 5
                    },
                    {
                        "op": "+",
                        "operand": 4
                    }
                ],
                "answer": 18,
                "question": "Number Chain: 6 → -4 → +7 → +5 → +4 → ?",
                "difficulty": "medium"
            },
            {
                "type": "number-chain",
                "subType": "number-chain",
                "start": 10,
                "steps": [
                    {
                        "op": "+",
                        "operand": 5
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                    {
                        "op": "x",
                        "operand": 4
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                    {
                        "op": "-",
                        "operand": 44
                    },
                    {
                        "op": "-",
                        "operand": 2
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                ],
                "answer": 14,
                "question": "Number Chain: 10 → +5 → x4 → -44 → -2 → ?",
                "difficulty": "medium"
            },
            {
                "type": "number-chain",
                "subType": "number-chain",
                "start": 9,
                "steps": [
                    {
                        "op": "-",
                        "operand": 2
                    },
                    {
                        "op": "+",
                        "operand": 6
                    },
                    {
                        "op": "x",
                        "operand": 2
                    },
                    {
                        "op": "+",
                        "operand": 7
                    }
                ],
                "answer": 33,
                "question": "Number Chain: 9 → -2 → +6 → x2 → +7 → ?",
                "difficulty": "medium"
            },
            {
                "type": "number-chain",
                "subType": "number-chain",
                "start": 3,
                "steps": [
                    {
                        "op": "-",
                        "operand": 1
                    },
                    {
                        "op": "-",
                        "operand": 1
                    },
                    {
                        "op": "+",
                        "operand": 9
                    },
                    {
                        "op": "-",
                        "operand": 2
                    }
                ],
                "answer": 8,
                "question": "Number Chain: 3 → -1 → -1 → +9 → -2 → ?",
                "difficulty": "medium"
            },
            {
                "type": "number-chain",
                "subType": "number-chain",
                "start": 4,
                "steps": [
                    {
                        "op": "+",
                        "operand": 4
                    },
                    {
                        "op": "x",
                        "operand": 4
                    },
                    {
                        "op": "x",
                        "operand": 3
                    },
                    {
                        "op": "-",
                        "operand": 58
                    }
                ],
                "answer": 38,
                "question": "Number Chain: 4 → +4 → x4 → x3 → -58 → ?",
                "difficulty": "medium"
            },
            {
                "type": "number-chain",
                "subType": "number-chain",
                "start": 5,
                "steps": [
                    {
                        "op": "+",
                        "operand": 7
                    },
                    {
                        "op": "x",
                        "operand": 5
                    },
                    {
                        "op": "-",
                        "operand": 10
                    },
                    {
                        "op": "-",
                        "operand": 22
                    }
                ],
                "answer": 28,
                "question": "Number Chain: 5 → +7 → x5 → -10 → -22 → ?",
                "difficulty": "medium"
            }
        ],
        "layout": {
            "columns": 2,
            "problemsPerPage": 20
        }
    },
    "outputTargets": {
        "screen": true,
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    "_archetype": "form-exercise",
    "_generatorId": "arithmetic-generator-v7.2.1"
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