Calculate the number 987
[7549] Calculate the number 987 - NUMBERMANIA: Calculate the number 987 using numbers [8, 9, 1, 4, 15, 934] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 1
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Calculate the number 987

NUMBERMANIA: Calculate the number 987 using numbers [8, 9, 1, 4, 15, 934] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
#brainteasers #math #numbermania
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Golf in Heaven

Bill, the avid golfer, contacts a "Medium" and asks if there is a golf course in Heaven.

The Medium says that his request is a big order, but he will try and find out and get back to him in a few days.

After several days go by, Bill finally gets a call from the Medium.

"Well," said Bill, "What did ya find out?"

"I've got good news and bad news for you," said the Medium.

"OK, what's the good news?" Bill exclaimed.

"Well, there is a beautiful 36 hole golf course in Heaven, and you'll have 24 hour access with your own personal caddy," blurted out the Medium!!

"And the bad news?" asked Bill.

"You're due to tee-off this Sunday at around 10:30 in the morning," the Medium said!

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Crystal rectifier

In 1874, a paper by Ferdinand Braun (1850-1918) was published in the Annalen der Physik und Chemie describing his discovery of the electrical rectifier effect. He observed that certain crystals of metal sulphides have a larger or smaller resistance to an electric current, depending on its direction of flow. He used a galena crystal, a semiconductor material composed of lead sulfide. He found the rectifying effect especially true if at least one of the electrodes was a pointed wire. Thus, he had discovered the point-contact rectifier effect, the first semiconductor device. This effect wasn't used until over 30 years later in the form of the “cat's whisker”crystal radio detector which ultimately led to the point-contact transistor first produced in 1948.
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