Calculate the number 690
[182] Calculate the number 690 - NUMBERMANIA: Calculate the number 690 using numbers [7, 8, 4, 5, 10, 100] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 53 - The first user who solved this task is Sanja Šabović
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Calculate the number 690

NUMBERMANIA: Calculate the number 690 using numbers [7, 8, 4, 5, 10, 100] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 53
The first user who solved this task is Sanja Šabović.
#brainteasers #math #numbermania
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Breaking The Silence

Brother John entered the 'Monastery of Silence' and the Chief Priest said, "Brother, this is a silent monastery, you are welcome here as long as you like, but you may not speak until I direct you to do so."

Brother John lived in the monastery for a full year before the Chief Priest said to him:

"Brother John, you have been here a year now, you may speak two words."

Brother John said, "Hard Bed."

"I'm sorry to hear that" the Chief Priest said. "We will get you a better bed."

The next year, Brother John was called by the Chief Priest. "You may say another two words Brother John."

"Cold Food." said Brother John, and the Chief Priest assured him that the food would be better in the future.

On his third anniversary at the monastery, the Chief Priest again called Brother John into his office. "Two words you may say today."

"I Quit." said Brother John.

"It is probably best." said the Chief Priest. "All you have done since you got here is complain."

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Diving suit

In 1834, the first U.S. patent for a practical underwater diving suit was issued to Leonard Norcross of Dixfield, Maine (No. X8255).* Calling it a "Diving Armor," he designed an airtight leather outfit with a brass helmet connected via a rubber hose to an air bellows pump on a boat. To reduce buoyancy, the feet were weighted with lead shot. In May 1834, one month earlier, he tested the diving suit in the Webb River. Norcross named his son Submarinus in honor of the achievement.* The first truly effective diving suit with pump is attributed to an Englishman, Augustus Siebe, who designed it in 1829 and was entrusted with equipping the French Navy until 1857.*
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