Calculate 4+20
[2395] Calculate 4+20 - If 1+5=18, 2+10=36, 3+15=54 then, 4+20=? - #brainteasers #math #riddles - Correct Answers: 265 - The first user who solved this task is Roxana zavari
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Calculate 4+20

If 1+5=18, 2+10=36, 3+15=54 then, 4+20=?
Correct answers: 265
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
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A nursery school teacher was d...

A nursery school teacher was delivering a station wagon full of kids home one day when a fire truck zoomed past. Sitting in the front seat of the fire truck was a Dalmatian dog. The children fell to discussing the dog's duties.
"They use him to keep crowds back," said one youngster.
"No," said another, "he's just for good luck."
A third child brought the argument to a close. "They use the dogs," she said firmly, "to find the fire hydrant."
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Sir Edward Frankland

Born 18 Jan 1825; died 9 Aug 1899 at age 74. English chemist who was one of the first investigators in the field of structural chemistry, invented the chemical bond, and became known as the father of valency. He studied organometallic compounds - hybrid molecules of the familiar organic non-metallic elements (such as carbon, hydrogen, nitrogen, sulphur, phosphorus) with true metals. By 1850, he had prepared small organic molecules containing such metals as zinc. Subsequently, he devised the theory of valence (announced 10 May 1852), that each type of atom has a fixed capacity for combination with other atoms. For his investigations on water purification and for his services to the government as water analyst, Frankland was knighted in 1897.
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