What is the sum of any two
Even numbers

What is the sum of any two Odd numbers ,Even numbers?

Arrange the numbers from 1 to 20 in a row such that the sum of any two adjacent numbers is a perfect square.

Show that the sum of first n even numbers is equal to (1+1/n) times the sum of first n odd numbers.

State whether the following statement is true or false. Give reasons for your answers. The sum of two even numbers is even.

Which of the following statements are true and which are false. Give reason in support of your answer. : The sum of two even numbers is an even number.

sum of two rational numbers is

A dice is so biased that it is twice as likely to show an even number as an odd number when thrown. It is thrown twice. What is the probability that he sum of the two numbers thrown is even.

Which one of the following statement is true? (i) The sum of two irrational numbers is always an irrational number. (ii) The sum of two irrational numbers is always a rational number. (iii) The sum of two irrational numbers may be a rational number or irrational number. (iv) The sum of two irrational numbers is always an integer.