BRAIN TEASERS

# Calculate the number 2398

NUMBERMANIA: Calculate the number 2398 using numbers [1, 9, 6, 4, 71, 212] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania

### Having a Beer

A man walks into a bar and orders three beers. He takes a drink out of one... sets it down. Takes a drink out of the second... sets it down. Takes a drink out of the third one... sets it down and repeats this process until all three beers are gone. The man then leaves.

On the same day the following week he is back and does the same thing with the three beers. This goes on for a month or two. The bartender is getting curious. The next time the man comes in, the bartender says, "I don't mean to be nosy, but why do you drink from three beers at one time?"

The man says, "When my two brothers and I lived close, we would go to the bar every week and have a beer together. Now we are all married and have moved far away. We all agreed that wherever we are, every week, we will each go to a local bar and have three beers to remember old times."

The bartender nods and goes on. The man finishes his three beers and leaves. A month later the man comes in and orders only two beers. He takes a drink from one... sets it down. Takes a drink from the second beer... sets it down, and repeats this process until the two beers are gone. This goes on for about a month and the bartender gets curious. The next time the man is in the bar, the bartender inquires, "I don't mean to be nosy, but what happened? Did one of your brothers pass away or something?"

The man says, "Oh, no, nothing like that. It's just that my wife said that I couldn't go to the bar and drink anymore... but she didn't say anything about my brothers."

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### Marie Curie's second Nobel Prize

In 1911, at Stockholm, Sweden, Marie Curie became the first person to be awarded a second Nobel prize. She had isolated radium by electrolyzing molten radium chloride. At the negative electrode the radium formed an amalgam with mercury. Heating the amalgam in a silica tube filled with nitrogen at low pressure boiled away the mercury, leaving pure white deposits of radium. This second prize was for her individual achievements in Chemistry, whereas her first prize (1903) was a collaborative effort with her husband, Pierre Curie, and Henri Becquerel in Physics for her contributions in the discovery of radium and polonium.
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