{
  "problem": "In history class, the girl to boy ratio is $7$ to $7$. If there are a total of $42$ students, how many boys are there?",
  "hints": [
    "A ratio of",
    "$7$",
    "girls to",
    "$7$",
    "boys means that a set of",
    "$14$",
    "students will have",
    "$7$",
    "girls and",
    "$7$",
    "boys.",
    "A class of",
    "$42$",
    "students has",
    "$3$",
    "sets of",
    "$14$",
    "students.",
    "Because we know that there are",
    "$7$",
    "boys in each set of",
    "$14$",
    "students, the class must have",
    "$3$",
    "groups of",
    "$7$",
    "boys each.",
    "There is a total of $21$ boys in history class."
  ]
}
{'source': 'AMPS', 'file': 'amps/khan/451/1608152258.json'}