{
  "question_id": 5107,
  "hints": [
    {
      "hint_level": 1,
      "hint": "Boys = k, Girls = 4k."
    },
    {
      "hint_level": 2,
      "hint": "Add them together."
    },
    {
      "hint_level": 3,
      "hint": "k + 4k = 5k children."
    }
  ]
}