{
    "hints":  [
                  {
                      "text":  "Count the chairs around one table. Then see what happens when two tables are joined.",
                      "level":  1
                  },
                  {
                      "text":  "Each time you add a table, you add 6 new chairs (not 8, because two sides are hidden).",
                      "level":  2
                  },
                  {
                      "text":  "Use the rule: chairs = 8 + 6 x (number of tables - 1). Try it for 4 and 15 tables.",
                      "level":  3
                  }
              ]
}