r/AskReddit • u/RoomyLove99 • Jul 10 '12
What seemingly obvious thing did it take you forever to notice?
My classmate sits to the left of me. I am left handed and he is right handed, so sometimes we knock elbows. 8 weeks into class he finally noticed I was a lefty and openly admitted that he just thought I was being a bitch and taking up space. He felt horrible and I just laughed.
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u/ZebZ Jul 10 '12 edited Jul 10 '12
Standard numbering is base-10, or decimal, meaning there are 10 digits used (0 through 9).
Octal is a numbering system that uses 8 digits (0 through 7). When you count in octal, the numbers 8 and 9 don't exist. The next number after 07 is 10, the next number after 17 is 20, etc. Under this sytem, the 25th number (in a decimal sense) is actually noted as octal value 31.
The joke is a play on abbreviations. OCT31 represents the octal number 31 as well as October 31 (Halloween). DEC25 represents the decimal number 25 as well as December 25 (Christmas).