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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Harmonica

"Thanks for the harmonica you gave me for Christmas," little Joshua said to his uncle the first time he saw him after the holidays. "It's the best present I ever got."

"That's great," said his uncle. "Do you know how to play it?"

"Oh, I don't play it," the little fellow said. "My mom gives me a dollar a day not to play it during the day and my dad gives me five dollars a week not to play it at night.

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Ernest Brown

Born 29 Nov 1866; died 22 Jul 1938 at age 71.Ernest (William) Brown was a British astronomer who devoted his career to the theory of the Moon's motion and constructing accurate lunar tables. His theory took account of "the gravitational action of every particle of matter which can have a sensible effect on the Moon's motion," some 1500 terms. He then determined the numerical values of the constants by analyzing 150 years of Greenwich observations, and computed tables accurate to 0.01 arcsec. After 30 years of work, Brown published his lunar tables Tables of the Motion of the Moon in 1919. In 1926 Brown published a paper in which he ascribed fluctuations in the Moon's motion to irregular changes in the Earth's period of rotation, which has subsequently proved correct.
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