Two irrational numbers whose sum is a rational number:

Example 1:
- Let's consider √2 and -√2 as two irrational numbers.
- The sum of these two numbers is √2 + (-√2) = 0, which is a rational number.
- Here, the irrational numbers √2 and -√2 cancel each other out when added, resulting in a rational number as the sum.

Example 2:
- Another example would be π (pi) and -π.
- Both π and -π are irrational numbers as they cannot be expressed as a simple fraction.
- The sum of π + (-π) is 0, which is a rational number.
- In this case, the irrational numbers π and -π also cancel each other out when added, resulting in a rational number as the sum.
In both examples, the sum of two irrational numbers results in a rational number due to the way the numbers are paired and added. This demonstrates that irrational numbers can combine in such a way that their sum becomes rational, showcasing the interesting and unique properties of different types of numbers.