Calculate the number 250
[799] Calculate the number 250 - NUMBERMANIA: Calculate the number 250 using numbers [2, 5, 1, 7, 57, 138] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 37 - The first user who solved this task is Sanja Šabović
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Calculate the number 250

NUMBERMANIA: Calculate the number 250 using numbers [2, 5, 1, 7, 57, 138] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 37
The first user who solved this task is Sanja Šabović.
#brainteasers #math #numbermania
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Letter to a Nosey Mom

A mother enters her daughter's bedroom and sees a letter over the bed. With the worst premonition, she reads it, with trembling hands:
It is with great regret and sorrow that I'm telling you that I eloped with my new boyfriend. I found real passion and he is so nice, with all his piercing and tattoos and his big motorcycle.
But is not only that mom, I'm pregnant and Ahmed said that we will be very happy in his trailer in the woods. He wants to have many more children with me and that's one of my dreams.
I've learned that marijuana doesn't hurt anyone and we'll be growing it for us and for his friends, who are providing us with all the cocaine and ecstasy we may want.
In the meantime, we'll pray for the science to find the AIDS cure, for Ahmed to get better, he deserves it.
Don't worry Mom, I'm 15 years old now and I know how to take care of myself. Some day I'll visit, so you can know your grandchildren.
Your daughter,
Judith

PS: Mom, it's not true. I'm at the neighbor's house. I just wanted to show you that there are worse things in life than the school's report card that's in my desk's drawer...I love you!  

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Alfred Werner

Died 15 Nov 1919 at age 52 (born 12 Dec 1866).Swiss chemist whose founding research into the structure of coordination compounds brought him the 1913 Nobel Prize for Chemistry. He demonstrated that stereochemistry was not just the property of carbon compounds, but was general to the whole of chemistry. His theory of chemical coordination (1893) recognized that many metals appeared to show variable valence and form complex compounds. Certain metals, such as cobalt and platinum, were capable through their secondary valences of joining to themselves a certain number of atoms or molecules. These were termed by Werner “coordination compounds.”and the maximum number of atoms (or “ligands”as he called them) that can be joined to the central metal is its coordination number.
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