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Proposition: Prop. 9.27: Odd Number minus Even Number is Odd

Euclid's Formulation

If an even (number) is subtracted from an odd number then the remainder will be odd. * For let the even (number) $BC$ have been subtracted from the odd (number) $AB$. * I say that the remainder $CA$ is odd.

Modern Formulation

(not yet contributed)

Table of Contents

Proofs: 1

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References

Adapted from (subject to copyright, with kind permission)

1. Fitzpatrick, Richard: Euclid's "Elements of Geometry"

Adapted from CC BY-SA 3.0 Sources:

1. Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016