What is the sum of any two

**(a)** Odd numbers?

**(b)** Even numbers?

**(a)** Sum of two odd numbers is even.

**(b)** Sum of two even numbers is even.

What is the sum of any two

**(a)** Odd numbers?

**(b)** Even numbers?

**(a)** Sum of two odd numbers is even.

**(b)** Sum of two even numbers is even.