1. What is CS Lewis' middle name?

2. The name of which element literally means 'acid giver or begetter' in Greek?

3. Which company did Billy Durant found in 1908?

4. In research, what is the "Hawthorne Effect"?

5. Which hat gets its name from the title of an 1882 play by Victorien Sardou?

For the answers, please visit: ten things i didn't know until last week.