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Why do mathematicians confuse Halloween and Christmas? | Hacker News Reader

Why do mathematicians confuse Halloween and Christmas?

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https://nitter.net/kit_yates_maths/status/173918891496169927...

text content (an old one):

Q. Why do mathematicians confuse Halloween and Christmas?

A. Because 31 Oct = 25 Dec.

Happy Christmas.

Please help me understand.

31 in Oct(al, base 8) = 25 in Dec(imal)

octal

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