MATH PUZZLE: Can you replace...
[2511] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 272 - The first user who solved this task is Roxana zavari
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 272
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
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An irate woman burst into the baker's shop...

An irate woman burst into the baker's shop and said, " I sent my son in for two pounds of cookies this morning, but when I weighed them there was only one pound. I suggest that you check your scales." The baker looked at her calmly for a moment or two and then replied, "

"Ma'am, I suggest you weigh your son."

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Polio virus

In 1955, American investigators Carlton Schwerdt and F.L. Schaffer crystallized the polio virus. This was the first animal virus to be obtained in crystalline form. (The first plant virus, tobacco mozaic virus, had been crystallized in 1935 by W.M. Stanley.) Each virus crystal is composed of many thousands of virus particles. Virus preparations pure enough to crystallize usually provide the best material for chemical studied. This was used to split the polio virus into infectious and non-infectious parts. Their research laid the groundwork for the polio vaccine.(Reference: Proc. Natl. Acad. Sci. 41:1020-1023)
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