Converse: If x is odd then x is prime. and Contra positive: If x is not odd then x is not a prime number.Converse: If x is not odd then x is prime. and Contra positive: If x is not odd then x is not a prime number. Converse: If x is odd then x is prime. and Contra positive: If x is not odd then x is a prime number.Contra positive: If x is odd then x is prime. and Converse: If x is not odd then x is not a prime number.