Line 1: Roman numeral C stands for 100; 100 degrees Celsius is the boiling point of water.

Line 2: A football field is 100 yards.

Line 3: The Hundred Years War

Line 4: As Neel points out, this is the 100th riddle posted to Shakespeare Teacher.

There are 85 postings in the Riddle category, which includes multiple riddles in Shakespeare Teacher Special Features Part One, Part Two, and Part Three. There’s an anagram posting that has two riddles. And there is one riddle that is not in one of the 85 posts, but is on one of the About pages. This makes a total of 100.

The Thursday Morning Riddle has been the most consistent and popular feature on the blog since its debut in January 2007. Thanks to all of you who keep making this fun: multiple riddle solvers Neel Mehta, Ro, Brian, Benjamin Baxter, DeLisa, Annalisa, Nilda, Kimi, Andrew, and Lee. Thanks also to visitors who have stopped in to solve a single riddle, those who have participated without solving, and those who play along silently each week.

Next week: Riddle 101!