{
  "prompt": {
    "id": "maths-03",
    "category": "maths",
    "kind": "puzzle",
    "title": "Sum of odd numbers",
    "text": "Show why 1 + 3 + 5 + ... + (2n minus 1) always equals n squared. Bonus points for a proof with a picture described in words.",
    "tags": [
      "proof"
    ]
  },
  "recent_replies": []
}