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
BRAIN TEASERS
enter your answer and press button OK

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
Register with your Google Account and start collecting points.
Check your ranking on list.

Don't Step on the Ducks

Three guys die together in an accident and go to heaven. When they get there, St. Peter says, "We only have one rule here in heaven: Don't step on the ducks!"
So they enter heaven, and sure enough, there are ducks all over the place. It is almost impossible not to step on a duck, and although they try their best to avoid them, the first guy accidentally steps on one.
Along comes St. Peter with the ugliest woman he has ever seen. St. Peter chains them together and says, "Your punishment for stepping on a duck is to spend eternity chained to the ugly woman!"
The next day, the second guy steps accidentally on a duck, and along comes St. Peter, who doesn't miss a thing, and with him is another extemely ugly woman. He chains them together with the same admonishment as for the first guy.
The third guy has observed all this and not wanting to be chained for all eternity to an ugly woman, is very, VERY careful where he steps. He manages to go months without stepping on any ducks, but one day St. Peter comes up to him with the most gorgeous woman he has ever laid eyes on: a very tall, tan, curvaceous, sexy blonde. St. Peter chains them together without saying a word.
The guy remarks, "I wonder what I did to deserve being chained to you for all of eternity?"
She says, "I don't know about you, but I stepped on a duck!"
Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks

Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

Jean Perrin

Died 17 Apr 1942 at age 71 (born 30 Sep 1870). Jean-Baptiste Perrin was a French physicist who, in his studies of the Brownian motion of minute particles suspended in liquids, verified Albert Einstein's explanation of this phenomenon and thereby confirmed the atomic nature of matter. Using a gamboge emulsion, Perrin was able to determine by a new method, one of the most important physical constants, Avogadro's number (the number of molecules of a substance in so many grams as indicated by the molecular weight, for example, the number of molecules in two grams of hydrogen). The value obtained corresponded, within the limits of error, to that given by the kinetic theory of gases. For this achievement he was honoured with the Nobel Prize for Physics in 1926.
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.