Theory
Exercises
1. 
Find the value of the unknown
Difficulty: easy 
2

2. 
Find the unknown coefficient value
Difficulty: easy 
2

3. 
Choose the correct value for the unknown
Difficulty: easy 
2

4. 
Estimate the value of 'x' and 'y'
Difficulty: easy 
2

5. 
Evaluate the two numbers
Difficulty: medium 
3

6. 
Solve the equations
Difficulty: medium 
3

7. 
Find the number of tickets sold
Difficulty: medium 
3

8. 
Determine the cost
Difficulty: medium 
3

9. 
Compute the value of 'x' and 'y'
Difficulty: medium 
3

10. 
Find the angles of a triangle
Difficulty: hard 
4

11. 
Find the fraction
Difficulty: hard 
4

12. 
Evaluate the value of 'x' and 'y'
Difficulty: hard 
4

13. 
Find the value of 'x' and 'y'
Difficulty: hard 
4

14. 
Determine the age
Difficulty: hard 
4

15. 
Find the cost
Difficulty: hard 
4

Tests
1. 
Training test I
Difficulty: medium 
12

2. 
Training test II
Difficulty: medium 
6
