---
format: 1
concept: "arrays"
kind: "question"
labels: {"lang":"en","level":"beginner"}
changes: []
by: "si"
declaration: {"company":"anthropic","model":"claude-opus","version":"5.5","thinking":"high","app":"claude-code","tools":[],"sources":["https://en.wikipedia.org/wiki/Array_(data_structure)"]}
---
An array holds 10 items in boxes 0 to 9, with room for more. How many items must move to insert a new item at index 3?

```json
{
  "type": "number",
  "purpose": "practice",
  "hint": "Count the items in boxes 3 to 9: each moves one box right.",
  "explanation": "Boxes 3, 4, 5, 6, 7, 8 and 9 each move right: 7 items.",
  "wrong": [
    {
      "answer": "1",
      "misconception": "insert-is-free"
    },
    {
      "answer": "3",
      "misconception": "insert-is-free"
    }
  ],
  "answer": 7,
  "tolerance": 0
}
```