Calculate the number 1553
[1868] Calculate the number 1553 - NUMBERMANIA: Calculate the number 1553 using numbers [8, 9, 3, 5, 28, 186] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 34 - The first user who solved this task is Djordje Timotijevic
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Calculate the number 1553

NUMBERMANIA: Calculate the number 1553 using numbers [8, 9, 3, 5, 28, 186] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 34
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania
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Animal Pictures

One day the teacher decides to play an animal game. She holds up a picture of a giraffe and asks if anyone knows what it is. No one raises his/her hand. The teacher says "See it's long neck? What animal has a long neck?"
Sally holds up her hand and asks if it is a giraffe.
"Very good Sally," the teacher replies. Next she holds up a picture of a zebra. None of the students holds up his/her hands. "See the stripes on this animal? What animal has stripes?"
Billy holds up his hand and says it is a zebra. "Very good Billy," the teacher replies. Next she holds up a picture of a deer. None of the students recognized the animal.
"See the big antlers on this animal. What animal has horns like this?"
Still no one guesses. "Let me give you another hint, it's something your mother calls your father."
Johnny shouts out "I know what it is, it's a horny bastard."

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Rock wool

In 1897, a rock wool factory in the U.S., the Crystal Chemical Works, was opened in Alexandria, Ind. Mineral wool had previously been made from blast furnace slag, but the new factory used local limestone rock in a process discovered by Charles Corydon Hall to create a sulphur-free product. The limestone was melted in a specially designed water-jacketed cupola, blown by steam pressure then allowed to cool to form fine threads. Its light, fibrous form resembled freshly-sheared sheep's wool. Being both insectproof and fireproof, rock wool was useful as a filtering material and as an insulating material for such uses as packing walls or for covering steam boilers. In 1929, the works became part of Johns Manville Corp.«
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