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aysan saidie

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last 3 solved tasks
If 8638+7542=664 and 5589+2468=872 then 1357+1919=?
If 5+7+2=68, 8+6+1=48 and 3+4+5=58 then 7+3+4=?
MATH PUZZLE: Can you replace the question mark with a number?

John Graunt

Born 24 Apr 1620; died 18 Apr 1674 at age 53. English statistician who is considered by many historians to have founded the science of demography (statistical study of human populations). For his published analysis of the parish records of christenings and deaths, he was made a charter member of the Royal Society. His 90-page book, “Natural and Political Observations Mentioned in a Following Index, and Made upon the Bills of Mortality” was distributed at the Royal Society meeting on 5 Feb 1662. He described his work as having “reduced several great confused volumes” of parish records into a few easily to understood tables, and “abridged such Observations... into a few succinct Paragraphs.” He initiated “life tables” of life expectancy. His use of demographics was further pioneered by his friend Sir William Petty and Edmond Halley, the Astronomer Royal.«

Don't Step on the Ducks

Three guys die together in an accident and go to heaven. When they get there, St. Peter says, "We only have one rule here in heaven: Don't step on the ducks!"
So they enter heaven, and sure enough, there are ducks all over the place. It is almost impossible not to step on a duck, and although they try their best to avoid them, the first guy accidentally steps on one.
Along comes St. Peter with the ugliest woman he has ever seen. St. Peter chains them together and says, "Your punishment for stepping on a duck is to spend eternity chained to the ugly woman!"
The next day, the second guy steps accidentally on a duck, and along comes St. Peter, who doesn't miss a thing, and with him is another extemely ugly woman. He chains them together with the same admonishment as for the first guy.
The third guy has observed all this and not wanting to be chained for all eternity to an ugly woman, is very, VERY careful where he steps. He manages to go months without stepping on any ducks, but one day St. Peter comes up to him with the most gorgeous woman he has ever laid eyes on: a very tall, tan, curvaceous, sexy blonde. St. Peter chains them together without saying a word.
The guy remarks, "I wonder what I did to deserve being chained to you for all of eternity?"
She says, "I don't know about you, but I stepped on a duck!"
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