1. Which of the following is a rational number?

2. Which of the following is not a rational number?

3. Which of the following is not a rational number?

4. Which of the following is an example of an integer?

5. Which of the following is an example of a terminating decimal?

6. Simplify the expression: (2/3 + 1/4) ÷ (1/6 - 1/8)

7. Which of the following is equal to -4/7 + 2/5?

8. Find the value of 3/8 + 2/5.

9. Which of the following is equivalent to 0.45 as a fraction?

10. Simplify the expression: 3/4 + 1/2 + 5/8

11. Which of the following is equal to -1/3 ÷ (-2/5)?

12. What is the product of -3/4 and 5/6?

13. What is the sum of -2/3 and 1/4?

14. Which is the smallest rational number?

15. Simplify the expression: (2/3) + (5/6)

16. Which fraction is equivalent to 8/12?

17. What is the value of π (pi) rounded to two decimal places?

18. What is the value of the irrational number e, commonly known as Euler's number, rounded to two decimal places?

19. What is the value of the irrational number √10, rounded to two decimal places?

20. What is the value of √2 + √8?

21. What is the value of √9?