| 227 | Science & Nature | Multiple Choice | Medium | What is the colour of unoxidized blood? |
| 226 | Science: Mathematics | Multiple Choice | Hard | What is the approximate value of mathematical constant e? |
| 225 | Science & Nature | True / False | Medium | The Doppler effect applies to light. |
| 224 | Science: Mathematics | Multiple Choice | Hard | What is the derivative of Acceleration with respect to time? |