Theorem 5odd

Description: 5 is an odd number. (Contributed by AV, 23-Jul-2020)

	Ref	Expression
Assertion	5odd	|- 5 e. Odd

Proof

Step	Hyp	Ref	Expression
1		4even	|- 4 e. Even
2		df-5	|- 5 = ( 4 + 1 )
3		evenp1odd	|- ( 4 e. Even -> ( 4 + 1 ) e. Odd )
4	2 3	eqeltrid	|- ( 4 e. Even -> 5 e. Odd )
5	1 4	ax-mp	|- 5 e. Odd