1. The problem involves points A, B, C, and D on a number line with coordinates 3 cm, 7 cm, 8 cm, and 14 cm respectively. 2. We can find the distances between these points by subtracting their coordinates. 3. Distance AB = $7 - 3 = 4$ cm. 4. Distance BC = $8 - 7 = 1$ cm. 5. Distance CD = $14 - 8 = 6$ cm. 6. Distance AD = $14 - 3 = 11$ cm. 7. These distances represent the lengths between the points on the ruler. 8. This is a simple application of subtraction on a number line to find segment lengths.