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Calculate the number 1311

NUMBERMANIA: Calculate the number 1311 using numbers [2, 7, 5, 2, 55, 526] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 20

The first user who solved this task is Djordje Timotijevic.

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Pancakes and waffle

“I think every morning that I'm going to make pancakes, but I keep waffling.”

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Henry Maudslay

Born 22 Aug 1771; died 14 Feb 1831 at age 59. British engineer and inventor of the metal lathe and other devices. Maudslay was apprenticed to locksmith Joseph Bramah, and soon became his foreman. When he left to go into business for himself, Maudslay's first job was construction of machinery for the ship block (pulley) factory of Sir Marc Isambard Brunel. Through three decades during the Industrial Revolution, Maudslay invented various important machines, but of these the metal lathe particularly noteworthy. He also invented methods for printing calico cloth and for desalting seawater for ships' boilers. He perfected a measuring machine that was accurate to 0.0001 inch, and produced for his workshop accurate standard planes.

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