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What is the missing number i...

What is the missing number in the pattern above?

Correct answers: 290

The first user who solved this task is Rutu Raj.

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Good news...bad news...

"I have good news and bad news," a defense attorney told his client.

"First the bad news: The blood test came back, and your DNA is an exact match with the sample found on the victim's dress."

"Oh, no - I'm ruined!" cried the client. "What's the good news?"

"Your cholesterol is down to 140!"

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William John Macquorn Rankine

Died 24 Dec 1872 at age 52 (born 5 Jul 1820). Scottish engineer and physicist and one of the founders of the science of thermodynamics, particularly in reference to steam-engine theory. As the chair (1855) of civil engineering and mechanics at Glasgow, he developed methods to solve the force distribution in frame structures. Rankine also wrote on fatigue in the metal of railway axles, on Earth pressures in soil mechanics and the stability of walls. He was elected a Fellow of the Royal Society in 1853. Among his most important works are Manual of Applied Mechanics (1858), Manual of the Steam Engine and Other Prime Movers (1859) and On the Thermodynamic Theory of Waves of Finite Longitudinal Disturbance.

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