Find number abc
[6895] Find number abc - If 3ac7a + 9a9b7 = 131cc2 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 26 - The first user who solved this task is Nasrin 24 T
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Find number abc

If 3ac7a + 9a9b7 = 131cc2 find number abc. Multiple solutions may exist.
Correct answers: 26
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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William Shanks

Born 25 Jan 1812; died 1882 .English mathematician who spent numerous years manually calculating the value of pi. Shanks kept a boarding school at Houghton-le-Spring in a coal mining area near Durham. His calulation of pi reached 707 places by 1873, a feat unchallenged until the use of electronic computers. He used the formula: π/4 = 4 tan-1(1/5)- tan-1(1/239). In 1944, Ferguson's new computation of pi showed Shanks had made a mistake in the 528th decimal place, invalidating the digits calculated beyond. Shanks had omitted two terms which caused his error. By the end of the twentieth century, computers could easily extend the results to over 2 billion places.
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