Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

demofox @demofox@mastodon.gamedev.place

3/31/2025, 4:39:52 AM

Public

My 10yo son said he noticed something odd about multiplication.
If you have some number C, then (C+1)*(C-1) is 1 less than C*C.
We started exploring and it worked with any C we tried.
We tried +/-2 and it was 4 less. He said he thought it was going by the square.
So we tried +/-3 and yep, it was 9 less.
C doesn't have to be an integer either.
It was a cool pattern he noticed and it was fun getting to explore math with him.
He surprised me a bit with that kind of an insight.

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