Find the area of the black region
[2917] 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) - #brainteasers #math #riddles - Correct Answers: 39 - The first user who solved this task is Sanja Šabović
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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)
Correct answers: 39
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles
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Poison

A man goes to see the Rabbi. "Rabbi, something terrible is happening and I have to talk to you about it."
The Rabbi asked, "What's wrong?"
The man replied, "My wife is poisoning me."
The Rabbi, very surprised by this, asks, "How can that be?"
The man then pleads, "I'm telling you, I'm certain she's poisoning me. What should I do?"
The Rabbi then offers, "Tell you what. Let me talk to her. I'll see what I can find out and I'll let you know."
A week later the Rabbi calls the man and says. "I spoke to your wife...spoke to her on the phone for three hours. You want my advice?"
The man said yes, and the Rabbi replied, "Take the poison!"
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David Wechsler

Born 12 Jan 1896; died 2 May 1981 at age 85.U.S. psychologist and inventor of several widely used intelligence tests for adults and children. During WW I, while assisting Edwin Garrigues Boring (1886-1968) in testing army recruits, Wechsler realized the inadequacies of the Army Alpha Tests (designed to measure abilities of conscripts and match them to suitable military jobs). He concluded that academically defined "intelligence" did not apply to "real life" situations. After leaving the military and more years of research, he developed the Wechsler Adult Intelligence Scale, and introduced deviation scores in intelligence tests. He developed the Wechsler Memory Scale in 1945, Wechsler Intelligence Scale for Children (1949), and Wechsler Preschool and Primary Scale of Intelligence (1967).
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