THE KNOWLEDGE FEED

5 Questions: Black Friday

Questions:5
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Mohs' Hardness Scale

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In the early 19th century, German mineralogist Friedrich Mohs developed a practical method for comparing the hardness of minerals. How many of the ten minerals in Mohs' scale can you name in 5 minutes?

5 Questions: Five on Six

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5 Questions: Shall I Call You a Cabernet?

Questions:5
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5 Questions: Shea Hey!

Questions:5
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5 Questions: Face to Face

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U.S. Representative or Little Rascal?

Questions:12
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Lately there's been some evidence that our U.S. Congress might be full of rascals. But, as far as we know, not one of our Representatives portrayed an actual little rascal in the Our Gang shorts. Can you tell the Little Rascal actors from the U.S. Representatives?

Star Search

Questions:18
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Even if you're not a fan of old movies, you know the names – Greta Garbo, Jean Harlow, Errol Flynn, William Holden. But can you ID them in a picture? It's more challenging than you think (although there are a couple of easy ones in there).

5 Questions: En Francais

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5 Questions: Picnic Guests

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5 Questions: Grab a Quick Sandwich

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5 Questions: Mellow Yellow

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On a 2011 episode of NPR's <em>Wait Wait...Don't Tell Me!</em>, Bill Clinton correctly answered three questions about <em>My Little Pony: Friendship Is Magic</em>.

On a 2011 episode of NPR's Wait Wait...Don't Tell Me!, Bill Clinton correctly answered three questions about My Little Pony: Friendship Is Magic.

5 Questions: BEDlam

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Pick the Second Most Populous City

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It's fairly easy to guess the most populated city in any given state, but how about the runner-up? We've given you four options. Can you tell which is each state's second most populated city?

Note: All population statistics are based on the United States Census Bureau's 2006 estimates and relate only to the city population—not surrounding metropolitan areas.

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