Dewey Decimal Classification for Numerology
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Observation
The Dewey decimal classification for numerology is $133 \cdotp 335$.
If you reverse it and add it to itself, you get:
- $666 \cdotp 666$
Spoo-kee ...
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $133 \cdotp 335$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $133 \cdotp 335$