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Calculate the number 2540

NUMBERMANIA: Calculate the number 2540 using numbers [6, 4, 9, 6, 38, 557] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 17

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

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Black and White

Attending a wedding for the first time, a little girl whispered to her mother, "Why is the bride dressed in white?"
"Because white is the color of happiness, and today is the happiest day of her life."
The child thought about this for a moment, then said, "So why is the groom wearing black?"

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Sir William Cecil Dampier

Born 27 Dec 1867; died 11 Dec 1952 at age 84. British scientist, agriculturist, and science historian who developed a method of extracting lactose (milk sugar) from the surplus whey. His invention, which was later put to use on a commercial scale, was prompted by the cheese shortage in Britain during WW I. From 1917, he conducted experiments for more efficient means of production on farm land with an estate inherited from one of his uncles. He was instrumental in the formation of the Agricultural Research Council, serving as its first secretary (1931-35). In A History of Science and Its Relations with Philosophy and Religion, he surveyed scientific breakthroughs from ancient Babylonia and Egypt, through to the early twentieth century. He was knighted (1931) for public service in agriculture.«

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