BRAIN TEASERS

Monthly Archive - March 2014 (page 3)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 21 to 30.

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Calculate the number 4065

NUMBERMANIA: Calculate the number 4065 using numbers [3, 5, 6, 7, 96, 227] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 27

The first user who solved this task is Sanja Šabović.

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Robert Hare

Died 15 May 1858 at age 77 (born 17 Jan 1781).American chemist who devised the first oxy-hydrogen blowpipe for the purpose of producing great heat. He was able to melt sizeable quantities of platinum with this blowpipe. Later, it was discovered that when such a blowpipe flame acted on a block of calcium oxide, a brilliant white light resulted—limelight. His device was also the ancestor of the modern welding torches. He presented a paper describing his invention on 10 Dec 1801 to the Chemical Society of Philadelphia.

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