Calculate the number 897
[6003] Calculate the number 897 - NUMBERMANIA: Calculate the number 897 using numbers [1, 2, 4, 5, 53, 209] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 19 - The first user who solved this task is Nílton Corrêa De Sousa
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Calculate the number 897

NUMBERMANIA: Calculate the number 897 using numbers [1, 2, 4, 5, 53, 209] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 19
The first user who solved this task is Nílton Corrêa De Sousa.
#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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John Hadley

Born 16 Apr 1682; died 14 Feb 1744 at age 61.British mathematician and inventor who perfected methods for grinding and polishing telescope lenses. Hadley improved the reflecting telescope (first introduced by Newton in 1668) and produced the first of its kind having sufficient accuracy and power to be useful in astronomy. It had a 6 inch mirror. He is also known for the reflecting octant (1730) used at sea to measure the altitude of the Sun or a celestial body above the horizon to within one second of arc. It was the ancestor of the modern nautical sextant. He was a prominent member of the Royal Society, of which he was vice-president from 21 Feb 1728. John Hadley was the older brother of George Hadley.«
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