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Want More Pi?

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David Ashton
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Pi made easy
David Ashton   3/25/2017 2:43:02 AM
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Max... "The video is 24 minutes long. At around the 15:30 mark, Matt triumphantly calculates the value of Π as being ~3.05. Hmm, "close, but no cigar," as they say. On the other hand, this is only off by ~2.8% and I'm still jolly impressed."

Well how impressive is THIS way of calculating it:

write the first three prime numbers twice each

113355

split them in two groups of three numbers

113 355

Reverse the groups and divide the first by the second

355 / 113 = 3.141592920.....

This only begins to deviate from the true value in the 8th significant figure, ie it is accurate to about 1 in 10 ^ -7 or a ten-thousandth of one percent.  Good enough???

Very useful if all you have is a non-scientific calculator without Pi built in.

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