[
  {
    "name": "Pecera 36x21x24",
    "contains_all": [
      "36 cm de longitud",
      "21 cm de ancho",
      "24 cm de altura"
    ],
    "contains_any": [
      "tinte",
      "pecera"
    ],
    "targets": [
      {
        "mode": "var",
        "var": "VarQuestion_0002",
        "answers": [
          "3492"
        ],
        "explanation": "Base + 2 caras largas + 2 caras anchas = 36×21 + 2(36×24) + 2(21×24) = 3492."
      },
      {
        "mode": "choice_contains",
        "choice": "area total",
        "answers": [
          "area total"
        ],
        "explanation": "Como se cubre la superficie del vidrio, la medida correcta es área total."
      }
    ]
  },
  {
    "name": "Perla y Jade",
    "contains_all": [
      "perla",
      "jade",
      "40"
    ],
    "targets": [
      {
        "mode": "single_answer_only",
        "answers": [
          "32"
        ],
        "explanation": "Volumen de Perla: 6×3×4 = 72. Diferencia con 40 = 32."
      }
    ]
  },
  {
    "name": "Pecera 55x29x24 con grosor",
    "contains_all": [
      "55 cm de longitud",
      "29 cm de ancho",
      "24 cm de altura"
    ],
    "contains_any": [
      "37,352 cm3",
      "37352 cm3",
      "grosor de 1 cm"
    ],
    "targets": [
      {
        "mode": "single_answer_only",
        "answers": [
          "4293"
        ],
        "explanation": "Si la base aumenta 3 cm de grosor, la altura útil baja 3 cm. Volumen perdido: 53×27×3 = 4293."
      }
    ]
  },
  {
    "name": "Decimal periodico denominadores",
    "contains_all": [
      "decimal periódico",
      "números de 1 a 10 podrían ser el denominador"
    ],
    "targets": [
      {
        "mode": "by_order",
        "answers_by_order": [
          "3",
          "6",
          "7",
          "9"
        ],
        "explanation": "En mínima expresión, un decimal es periódico si el denominador tiene primos distintos de 2 y 5."
      }
    ]
  },
  {
    "name": "3700 como centenas",
    "contains_all": [
      "3.700",
      "modelos de 100"
    ],
    "targets": [
      {
        "mode": "var",
        "var": "VarQuestion_0001",
        "answers": [
          "37"
        ],
        "explanation": "3700 son 37 centenas."
      },
      {
        "mode": "var",
        "var": "VarQuestion_0002",
        "answers": [
          "7"
        ],
        "explanation": "37 centenas = 30 centenas + 7 centenas."
      },
      {
        "mode": "var",
        "var": "VarQuestion_0003",
        "answers": [
          "3"
        ],
        "explanation": "3 unidades de mil equivalen a 30 centenas."
      },
      {
        "mode": "var",
        "var": "VarQuestion_0004",
        "answers": [
          "37"
        ],
        "explanation": "30 centenas + 7 centenas = 37 centenas."
      }
    ]
  }
]