MATH PUZZLE: Can you replace...
[2989] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 2987 - The first user who solved this task is Дејан Шкребић
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 2987
The first user who solved this task is Дејан Шкребић.
#brainteasers #math #riddles
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Old Josh was sat in his garden...

Old Josh was sat in his garden, sunbathing in the deck chair when he noticed his grand-son kneeling on the lawn with a worm. When he asked his grandson what he was doing, he found that he was trying to push the worm down the hole from which it came.
"If you can get that worm back in that hole I'll give you ten dollars," said Josh.
His grandson sat and thought for a moment, then rushed into the house. A few minutes later he returned with his mother's hair spray. He picked up the worm by one end and, as he let it hang down, he sprayed it all over with the hair spray. The spray set and the worm became stiff and hard. It was now easy to push the worm back in the hole. Josh was amazed. He gave the boy ten dollars, picked up the hair spray and went indoors.
About an hour later Josh came back into the garden and gave his grand-son another ten dollars.
"But grandpa," said the boy, "you've already given me the ten dollars you promised."
"That's from your grandma," said Josh.
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Heinrich Rohrer

Born 6 Jun 1933.Swiss physicist who, with Gerd Binnig, received half of the 1986 Nobel Prize for Physics for their joint invention of the scanning tunneling microscope. (Ernst Ruska received the other half of the prize.) Ruska's electron microscope of the 1930s was unable to show surface structure at the atomic level. Rohrer and Binnig began work in 1978 on a scanning tunneling microscope in which a fine probe passes within a few angstroms of the surface of the sample. A positive voltage on the probe enables electrons to move from the sample to the probe by the tunnel effect, and the detected current can used to keep the probe at a constant distance from the surface. As the probe moves in parallel lines, a 3D image of the surface can be constructed.
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