Can you replace the question mark with a number?
[6353] Can you replace the question mark with a number? - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 46 - The first user who solved this task is Nasrin 24 T
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Can you replace the question mark with a number?

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 46
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #riddles
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Harry under stress

Harry had been feeling sick lately and was finally convinced to see the Doctor after his wife Suzy's urging.
After a thorough examination, and much thought, the Doctor was ready to tell Harry and a very worried Suzy, his prognosis: Harry was too stressed out. He would need 6 months of pure relaxation.
Suzy, very agitated, took out her notepad to begin writing down his list of orders for these months of relaxation.
"How should I go about it?" asked Harry.
"OK," said the doctor, "I would like your wife to take one tranquilizer four times a day..."
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Ernst Engel

Died 8 Dec 1896 at age 75 (born 26 Mar 1821). German statistician, the head of the Prussian Statistical Bureau (1860-82), known for the "Engel curve," or Engel's law, which states that the proportion of expenditure on food will fall as income rises, i.e. food is a necessary good. Engel's law applies to goods as a whole. Demand for food, clothing and shelter - and for most manufactured products - doesn't keep pace with increases in incomes. Engel curves are useful for separating the effect of income on demand from the effects of changes in relative prices. Engel also examined the relationship between the size of the Prussian rye harvest and the average price of rye over a number of years prior to 1860, probably the first empirical study of the relationship between price and supply.
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