We're back with another 5-day trivia hunt!

To remind you of the rules: Every day this week, I'll be presenting a specific challenge. Your job: come up with the answers and hold onto them! Why? Because on Friday, you'll need them to solve a short puzzle. The first person to email in the correct answers and successfully show how you arrived at them (thus the title: How Did You Know?) wins a choice of any t-shirt and book from our store.

We're also adding some special prizes this time around for those who come really close, but don't get all the answers in time. And last month, we awarded some shirts and books to a couple contestants who impressed us with charts, diagrams, and other complex methods of recording and organizing the clues/answers. So we'll be on the lookout for the creative among you, as well. This is all to say: it pays to play whether you nab the grand prize or not.

As with previous How Did You Know? posts, comments have been turned off, but I definitely encourage you to work in teams. April's winner was the team of Bill Pearson and Adam Constable, who I know benefitted greatly from e-mailing each other throughout the week. So write your friends, send around each daily challenge, conspire, work together, whatever it takes to make sure you're armed with the right answers going into Friday's puzzle.

If you missed Day 1's challenge, it can be found right over here, while Day 2 is right here and Day 3, here.

Today we're playing Name That Country, camouflage-style. There are five countries hiding in the puzzle on the next page. Each row contains the name of one country, the letters of which are in order from left to right. All you have to do is remove the wrong letters to reveal the correct ones. Be sure to hit that last page for a clue that will help you tomorrow.

Once you have all five, start reviewing your answers from the week. Tomorrow final puzzle goes up at 2p.m. ET. (11am PT) Good luck to all!


Click here for a clue that will help you with tomorrow's challenge.