{
    "hints":  [
                  {
                      "text":  "Count the squares in each figure: Figure 1 has 1, Figure 2 has 3, Figure 3 has 6.",
                      "level":  1
                  },
                  {
                      "text":  "The pattern follows triangular numbers: add the next counting number each time.",
                      "level":  2
                  },
                  {
                      "text":  "Formula: n(n+1)/2. Check: Figure 5 = 5x6/2 = 15, Figure 14 = 14x15/2 = 105.",
                      "level":  3
                  }
              ]
}