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Determine the value of the number ABCD

Correct answers: 113

The first user who solved this task is Djordje Timotijevic.

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A guy says to the bartender...

A guy says to the bartender, "A glass of your finest Less, please."
"Less? Never heard of it."
"C'mon, sure you have."
"No, really, we don't stock it. What is it? Some kind of foreign beer?"
"I'm not sure. It was my doctor who mentioned it. He said I should drink Less."

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Antiproton

In 1955, a new atomic subparticle called a negative proton (antiproton) was discovered at U.C. Berkeley. The hunt for antimatter began in earnest in 1932, with the discovery of the positron, a particle with the mass of an electron and a positive charge. However, creating an antiproton would be far more difficult since it needs nearly 2,000 times the energy. In 1955, the most powerful "atom smasher" in the world, the Bevatron built at Berkeley could provide the required energy. Detection was accomplished with a maze of magnets and electronic counters through which only antiprotons could pass. After several hours of bombarding copper with protons accelerated to 6.2 billion electron volts of energy, the scientists counted a total of 60 antiprotons.[Image: The first annihilation star, Faustina, of an antiproton found in film exposed by the Berkeley scientists, 1955]

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