Practice Questions
| 1. | Find the sides of the right triangle Difficulty: hard | 
                                    
                                    5
                                 | 
| 2. | Determine the present ages Difficulty: hard | 
                                    
                                    5
                                 | 
| 3. | Solving quadratic equation: Broken tree Difficulty: hard | 
                                    
                                    5
                                 | 
| 4. | Determine the speed of the train Difficulty: hard | 
                                    
                                    5
                                 |