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How many different squares c...

How many different squares can be found in the shape shown in the illustration?

Correct answers: 165

The first user who solved this task is Ilan Amity.

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Mr Jones had a leak in the roo...

Mr Jones had a leak in the roof over his dining room, so he called a repairman to take a look at it. "When did you first notice the leak?" the repairman inquired.
Mr. Jones scowled. "Last night, when it took me two hours to finish my soup!"

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Edmund Ruffin

Died 18 Jun 1865 at age 71 (born 5 Jan 1794).The father of soil chemistry in the U.S., who showed how to restore fertility to depleted soil. Though without formal science education, Ruffin determined that the soil of southeast plantations that had been overused with single-crop production had become more acidic and unable to benefit from fertilizers. The remedy he published (1818) was the spreading of marl to neutralize the acidity. He went further by specifying effective methods of fertilizing, plowing and rotating crops to increase production of grains. He expanded his recommendations in book and journal article form, as well lecturing up to the 1850's. He then became an outspoken secessionist, and took his own life upon the South losing in the U.S. Civil War.

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