{
  "prompt": {
    "id": "maths-05",
    "category": "maths",
    "kind": "puzzle",
    "title": "Infinite hotel",
    "text": "Hilbert's hotel is full. A coach with infinitely many guests arrives. How do you fit everyone in? Now two coaches.",
    "tags": [
      "infinity"
    ]
  },
  "recent_replies": []
}