Math-history lesson: The square root of three, to three decimal places, is 1.732. One way to remember it is to think of George Washington’s birth year, which was 1732.

Your humble trivia author recently wondered about the gas mileage of a Boeing 747. Thanks to the plane’s technical specifications (maximum fully loaded range and fuel-tank capacity), we have the answer. What is the approximate fuel economy of a fully loaded Boeing 747?

A) 14 gallons per mile

B) 1.4 gallons per mile

C) 1.4 miles per gallon

D) 14 miles per gallon

Monday’s answer: The quote from Swiss-born philosopher Jean-Jacques Rousseau in full: “Happiness: a good bank account, a good cook and good digestion.”

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