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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A husband and wife are sitting...

A husband and wife are sitting quietly in bed reading when the wife looks over at him and asks the question.
WIFE: "What would you do if I died? Would you get married again?"
HUSBAND: "Definitely not!"
WIFE: "Why not? Don't you like being married?"
HUSBAND: "Of course I do."
WIFE: "Then why wouldn't you remarry?"
HUSBAND: "Okay, okay, I'd get married again."
WIFE: "You would?" (with a hurt look)
HUSBAND: (makes audible groan)
WIFE: "Would you live in our house?"
HUSBAND: "Sure, it's a great house."
WIFE: "Would you sleep with her in our bed?"
HUSBAND: "Where else would we sleep?"
WIFE: "Would you let her drive my car?"
HUSBAND: "Probably, it is almost new."
WIFE: "Would you replace my pictures with hers?"
HUSBAND: "That would seem like the proper thing to do."
WIFE: "Would you give her my jewelry?"
HUSBAND: "No, I'm sure she'd want her own."
WIFE: "Would she use my golf clubs?"
HUSBAND: "No, she's left-handed."
WIFE: -- silence-
HUSBAND: "sh*t."
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Friedrich Mohs

Died 29 Sep 1839 at age 66 (born 29 Jan 1773).German mineralogist who devised the Mohs scale to compare mineral harness, illustrated by ten common or readily-available minerals. They are ranked by which can scratch another. At the beginning of his scale, 1 to 3, are talc, gypsum and calcite. At the top, the hardest 8 to 10, are topaz (including emerald and aquamarine), corundum (including as varieties sapphire and ruby) and diamond. Diamond is known for its common use to edge cutting tools, because it is four times as hard than even corundum. Interestingly, gold and silver come in the 2.5 to 3 range, which is comparable to the hardness of a fingernail (2.5). Mohs proposed this non-linear hardness scale in 1812, after spending a year as curator organizing an institution's mineral collection. By 1820, his scale was widely used by mineralogists, and he contined to refine it.«
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