Theory
Exercises
1. 
Choose the correct answer
Difficulty: easy 
6

2. 
Say true or false
Difficulty: easy 
3

3. 
Number of elements in the union of sets
Difficulty: easy 
3

4. 
Number of elements in the intersections of sets
Difficulty: easy 
2

5. 
Find the number of elements in only one set
Difficulty: easy 
4

6. 
Determine the answer
Difficulty: medium 
7

7. 
Evaluate the number of workers
Difficulty: medium 
3

8. 
Drag the correct answer
Difficulty: medium 
4

9. 
Calculate the percentage
Difficulty: medium 
3

10. 
Find the value of "x"
Difficulty: medium 
3

11. 
Determine the number of students
Difficulty: medium 
3

12. 
Select the correct answer
Difficulty: medium 
4

13. 
Find the number of students
Difficulty: hard 
3

14. 
Complete the blanks
Difficulty: hard 
6

15. 
Find the answer
Difficulty: hard 
6

16. 
Fill in the blanks
Difficulty: hard 
6

Tests
1. 
Training test
Difficulty: medium 
12

2. 
Training test
Difficulty: medium 
10
