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Calculate the number 9040

NUMBERMANIA: Calculate the number 9040 using numbers [1, 3, 9, 7, 53, 986] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

#brainteasers #math #numbermania

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A skeleton walks ...

A skeleton walks down empty Main Street. Suddenly he sees another skeleton carrying a gravestone. "Hey, what are you doing?” the other skeleton answers "Just strolling", "Why do have the gravestone, buddy?", "Because I always want to have some ID”.

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Lloyd Viel Berkner

Died 4 Jun 1967 at age 62 (born 1 Feb 1905).American physicist and engineer who first measured the extent, including height and density, of the ionosphere (ionized layers of the Earth's atmosphere), leading to a complete understanding of radio wave propagation and he helped develop radar systems, especially the Distant Early Warning system. He later investigated the origin and development of the Earth's atmosphere. Early in his career, he worked on radio navigation beacons for the Airways division of the Bureau of Lighthouses (1927-28), as radio engineer on the Byrd Antarctic expedition (1928-30). Returning to the U.S. Bureau of Standards (1930-33) he studied the ionosphere using radio-pulse transmissions, then terrestrial magnetism with the Carnegie Institution (1933-51).

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