# Concept derivation guides

299 concept teaching guides, separate from the 36,000 individual question derivations.

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Concept guide



## [Quotienting Z/4Z by its even ideal](/en/derivations/derivation-mko-finite-quotient-ring-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-finite-quotient-ring)

I={0,2} is a proper two-sided ideal; R/I has two cosets and well-defined operation tables.

Quotient ring of a finite ring

derivation-mko-finite-quotient-ring-01





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