| 2547 | Science & Nature | True / False | Easy | An exothermic reaction is a chemical reaction that releases energy by radiating electricity. |
| 2548 | Science & Nature | True / False | Medium | In the periodic table, Potassium's symbol is the letter K. |
| 2549 | Entertainment: Books | Multiple Choice | Medium | According to The Hitchhiker's Guide to the Galaxy book, the answer to life, the universe and everything else is... |
| 2551 | Entertainment: Video Games | Multiple Choice | Medium | In the first Left 4 Dead, you can play as either of these four characters. |