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Calculate the number 217

NUMBERMANIA: Calculate the number 217 using numbers [8, 6, 6, 5, 77, 848] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 4

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A woman phoned her dentist whe...

A woman phoned her dentist when she received a huge bill. "I'm shocked!" she complained. "This is three times what you normally charge."
"Yes, I know," said the dentist. "But you yelled so loud, you scared away two other patients."

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Parity conservation disproved

In 1956, the formerly believed “law” of conservation of parity was disproved in the first successful results from an experiment conducted by Madame Chien-Shiung Wu at Columbia University on the beta-decay of cobalt-60. It had been suggested in a paper published by Tsung-Dao Lee and Chen Ning Yang on 1 Oct 1956. There had been problems to overcome working with the cobalt sample and detectors in a vacuum at a working temperature of one-hundredth of a kelvin. Wu's team repeated the experiment, doing maintenance on the apparatus as necessary, until on 9 Jan 1957 further measurements confirmed the initial results. Leon Lederman performed an independent test of parity with Columbia's cyclotron. They held a press conference on 15 Jan 1957.«

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