1 + 1 = 2.

Would you like any details or have any questions? Here are five questions you might consider asking next:

1. How do you solve quadratic equations?
2. What are the properties of prime numbers?
3. Can you explain the Pythagorean theorem?
4. How do you find the derivative of a function?
5. What is the integral of $x^2$?

Tip: In mathematics, always double-check your work to ensure accuracy.