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Try to solve this mathematic...

Try to solve this mathematical puzzle. Find the missing number.

Correct answers: 99

The first user who solved this task is Djordje Timotijevic.

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Makin' babies...

A second grader came home from school and said to her mother, "Mom, guess what? We learned how to make babies today."

The mother, more than a little surprised, asked fearfully, "That's interesting. How do you make babies?"

"It's simple," replied the girl. "You just change 'y' to 'i' and add 'es'."

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Nicolas Louis de Lacaille

Born 15 Mar 1713; died 21 Mar 1762 at age 49.Abbé Nicolas Louis de Lacaille was a French astronomer who named 15 of the 88 constellations in the sky. He spent 1750-1754 mapping the constellations visible from the Southern Hemisphere, as observed from the Cape of Good Hope, the southernmost part of Africa. In his years there, he was said to have observed over 10,000 stars using just his 1/2-inch refractor. He established the first southern star catalogue containing 9776 stars (Caelum Australe Stelliferum, published partly in 1763 and completely in 1847), and a catalogue of 42 nebulae in 1755 containing 33 true deep sky objects (26 his own discoveries).[DSB gives birth date as 15 Mar 1713. EB gives 15 May 1713.]

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