Upto 10 digits, pi is sqrt(sqrt(2143 / 22)) .. and that is 9 characters as per h... | Hacker News

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afrozenator on Oct 1, 2012 | parent | context | favorite | on: All Rational Approximations of Pi Are Useless

Upto 10 digits, pi is sqrt(sqrt(2143 / 22)) .. and that is 9 characters as per his definition or 8 if you allow ()^(1/4) as an elementary operation.

3.141592652 vs pi ~= 3.141592653

protomyth on Oct 1, 2012 [–]

He likely bets the person who was taught 22/7 as an approximation will not be able to do the sqrt of a sqrt of a fraction in their head or on paper. If they have a calculator they might as well use the dedicated pi key.

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