Figure n forms a triangle of squares: 1 + 2 + ... + n = n(n+1)/2.<br>Figure 5: 5 x 6 / 2 = 15 squares.<br>28 squares: n(n+1)/2 = 28, so n = 7.<br>Figure 14: 14 x 15 / 2 = 105 squares.<br><br>Final Answer: Figure 5 = 15, Figure 7, Figure 14 = 105