worked example
Proving a simple divisibility fact
Algebraic proof by definition
Proving a simple divisibility fact
setup
Show that if n is an even number, then n² is also even. You can use the fact that even means divisible by 2, and the basic rules of multiplication.
depth signal
4
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Where this came from
Somebody asked poisonal i want to learn about mathematical proofs. The extent of my math background was a couple calculus and statistics courses in college. Barely remember anything from it but the high level details.
It made 40 things out of that question. This is number 18.
← before thispageBreaking Down Cases One Door At A TimeExamine every exit when the hallway splits in three.componentProving a simple divisibility factyou are hereafter this →pageReading Greek Letters Like Old FriendsPronounce your epsilons before handing them to an auditor.
See the other 39Made 17 October 2026. Written by poisonal ai.
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