Tamura-Kanada Circuit Method/Example/Mistake

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Source Work

1986: David Wells: Curious and Interesting Numbers:

The Dictionary
$3 \cdotp 14159 \, 26535 \, 89793 \, 23846 \, 26433 \, 83279 \, 50288 \, 41972 \ldots$


Mistake

Here are the values of $\pi$ after going round just $3$ times on a pocket calculator. It is already correct to $5$ decimal places!
\(\text {(1)}: \quad\) \(\ds \) \(\) \(\ds 2 \cdotp 91421 \, 35\)
\(\text {(2)}: \quad\) \(\ds \) \(\) \(\ds 3 \cdotp 14057 \, 97\)
\(\text {(3)}: \quad\) \(\ds \) \(\) \(\ds 3 \cdotp 14159 \, 28\)


It is in fact seen that the value for $\pi$ is actually correct to $6$ decimal places, not $5$.

In David Wells: Curious and Interesting Numbers (2nd ed.), this has been corrected.


Sources