1. The problem states that you needed to reach 50 points but only reached 40 points, resulting in a strike. 2. To analyze this, we consider the difference between the required points and the points achieved. 3. The formula to find the difference is $$\text{Difference} = \text{Required Points} - \text{Achieved Points}$$. 4. Substituting the values, we get $$\text{Difference} = 50 - 40 = 10$$. 5. This means you are 10 points short of the required 50 points. 6. In many scoring or game systems, failing to meet the required points can result in a penalty or strike. 7. Therefore, since you scored 40 instead of 50, you received a strike due to being 10 points below the target. 8. To avoid strikes, aim to meet or exceed the required points in future attempts.