What is the next number in this series?
[5492] What is the next number in this series? - Look at the series (1, 5, 15, 30, 150, 450, 900, 4500, ?), determine the pattern, and find the value of the next number! - #brainteasers #math #riddles - Correct Answers: 75 - The first user who solved this task is Djordje Timotijevic
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What is the next number in this series?

Look at the series (1, 5, 15, 30, 150, 450, 900, 4500, ?), determine the pattern, and find the value of the next number!
Correct answers: 75
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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Double negative

A linguistics professor was lecturing to his class one day. "In English," he said, "a double negative forms a positive. In some languages though, such as Russian, a double negative is still a negative."

"However," he pointed out, "there is no language wherein a double positive can form a negative."

A voice from the back of the room piped up, "Yeah. Right."

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Nails patent

In 1795, Jacob Perkins, of Newburyport, Massachusetts, was awarded a U.S. patent for a machine for cutting and heading nails. It was the second year of President George Washington's second term. In 1795, he was issued a patent for an improved nail machine. He established a nail maufacturing business on the Powwow River in Amesbury, Mass. He eventually held 21 American patents, and 19 more in England.
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