Proposition: Prop. 9.24: Even Number minus Even Number is Even

(Proposition 24 from Book 9 of Euclid's “Elements”)

If an even (number) is subtracted from an(other) even number then the remainder will be even.

fig24e

Modern Formulation

(not yet contributed)

Proofs: 1

Proofs: 1 2 3 4


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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