Rules for Adding Even and Odd Numbers: All numbers follow these 4 patterns: i. Even + Even = Even Example: 2 + 2 = 4 ii. Odd + Odd = Even Example: 1 + 3 = 4 iii. Even + Odd = Odd Example: 2 + 3 = 5 iv. Odd + Even = Odd Example : 1 + 2 = 3