While I’m off work, I’m keeping a hand in the game with five trivia questions and answers each weekday.

1. What presidential scion/future U.S. president served as Secretary of State under President James Monroe?

2. The Ohio River originates in Pennsylvania and flows into the Mississippi in Illinois. Along the way, it forms the entire southern borders of which two states?

3. What word fills in both power-innovation blanks?

   The first electric battery was dubbed the "Voltaic ______" and the first manmade self-sustaining nuclear reactor was dubbed "Chicago ______-1."

4. Some countries’ national animals are mythological beasts, such as China’s dragon and Scotland’s unicorn. Which country’s national animal is the winged horse called the "chollima"?

5. The baiji, a Chinese river dolphin, was declared extinct in 2006, the first mammal driven to extinction by man in 50 years. What river constituted the entire habitat of the baiji?

Answers here. Warning: So far, all of the answers are on the same page, so if you haven’t played the previous days’ questions, be careful where you scroll.