| Question | |
| The noble gas Radon is discovered. By whom? | |
| The Chicago ship canal opens, connecting the Mississippi river with what? | |
| In May 1900 an uprising against foreigners begins in China. It was afterwards given what name? | |
| Puccini premieres which of his operas in Rome? | |
| The Box Brownie camera is launched by which company? | |
| Which organisation publishes it's first restaurant guide? | |
| Manufacture begins of which famous handgun? | |
| Frank L. Baum publishes a children's book destined for great fame. What is it called? | |
| | Question | |
| Who is released from exile in Siberia? | |
| In which American city is an outbreak of bubonic plague? | |
| The trial flight of which aircraft takes place in Germany in July? | |
| In which European capital does the Great Exibition open? | |
| In which city does the 2nd modern Olympic games take place? | |
| The USA wins the first of which international tennis tournament? | |
| Which physicist reveals the Quantum Theory? | |
|