You know the presidents. Do you know their back-up plans? Choose which person served as VP under each commander in chief.

Take the Quiz: Who Was His VP?

Continuing our occasional series on classic Nickelodeon cartoons, we present The Ren & Stimpy Show. The adventures of the manic chihuahua and the stupid cat were sometimes more blue than traditional Nick fare, but they remain classics in the cartoon world. Get more than 10 right and we won’t call you an “eediot.”

Take the Quiz: Ren & Stimpy

Hey, porcupine! Names in the questions of Thursday’s 5 Questions quiz celebrate: The Three Stooges

Today is the 16th day of May, which got me thinking about the number 16. There are 16 ounces in a pound, 16 teams in each NFL conference, and 16 digits in a bank card number. In today’s mentalfloss.com Lunchtime Quiz, however, we treat 16 as a word. Your goal is to name all the non-obscure English words you can (of four letters or more) using the letters in the word SIXTEEN. You’ll have 8 minutes for this challenge, and (naturally!) a score of 16 or better is a win. Good luck!

Give today’s Lunchtime Quiz a shot: Sixteen

Ahoy there! The questions in Wednesday’s 5 Questions quiz contain the names of Nautical Notables

Gertrude Stein is emblematic of a literary and artistic era, with the rhythmic cadence of her poetry underlining a naked self-expression, while her playful idiosyncrasies belie an austere complexity. Her patronage of great artists such as Picasso and Matisse figured prominently in the cultivation of the cross-platform artistic culture of early twentieth-century Paris.

Jose Canseco slugged 462 dingers over 16 years in the Major Leagues, followed by a brief jaunt as an MMA fighter. Known on Twitter for his candid insight, bouts of oppressive confidence tempered by poignant disclosures of self doubt, and an ever-turbid relationship with the ethereal but “so hot” Leila Shennib (“Leila please call me”), Canseco’s highly accessible yet shadowy consciousness is nothing if not compelling. He’s even inspired a series of motivational posters.

Can you decipher which of these phrases are lines from Stein’s writing, and which are tweets from @JoseCanseco?

Take the Quiz: Who Said It: Jose Canseco or Gertrude Stein?

Tuesday’s 5 Questions quiz has fire and brilliance and heavy carat weight: Colorful Stones

Let’s breathe some fire into Monday’s 5 Questions quiz: Dragon the Line

Each of this week’s 5 Questions quiz questions will contain a particular sequence of letters. Friday, ‘Gris’ Is the Word

We’re in graduation season, where our most important citizens will be dispatched to campuses across the country to impart wisdom to the class of 2012. I’ve pulled ten quotes from past commencement speeches—can you figure out who delivered the remarks? When you’re done, let us know who’s speaking at your school this year.

Take the Quiz: Name That Commencement Speaker