BRAIN TEASERS

# Find the area of the black region

Find the area of the black region accurate up to 3 decimal places. (A=?, a=20, b=10)
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles

### Some Very Common Traits In Two Drunks

A man stumbles up to the only other patron in a bar and asks if he could buy him a drink. "Why of course," comes the reply.
The first man then asks: "Where are you from?"
"I'm from Ireland," replies the second man.
The first man responds: "You don't say, I'm from Ireland too! Let's have another round to Ireland."
"Of course," replies the second man.
I'm curious, the first man then asks: "Where in Ireland are you from?"
"I can't believe it," says the first man. "I'm from Dublin too! Let's have another drink to Dublin."
"Of course," replies the second man.
Curiosity again strikes and the first man asks: "What school did you go to?"
"Saint Mary's," replies the second man, "I graduated in '62."
"This is unbelievable!", the first man says. "I went to Saint Mary's and I graduated in '62, too!"
About that time in comes one of the regulars and sits down at the bar. "What's been going on?" he asks the bartender.
"Nothing much," replies the bartender. "The O'Kinly twins are drunk again."
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### Chernobyl final shut down

In 2000, the ill-fated Chernobyl nuclear plant was ceremoniously permanently shut down in Ukraine - more than 14 years after one of its reactors exploded in the world's worst civil nuclear catastrophe on 26 Apr 1986. The last working reactor, Number Three, had in fact been shut down the previous week because of technical problems. It was restarted, though not attached to the national grid and at minimum power output, so the world would be able to see it symbolically switched off. Chernobyl had provided Ukraine with around five percent of its electricity from its last working reactor. One by one, Chernobyl's reactors have shut down over the years. After the 1986 disaster, a fire stopped one of the remaining reactors in 1991, and a third shut down in 1996.
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