Theory
Exercises
1. 
Find the sum of the numbers
Difficulty: easy 
3

2. 
Determine the sum of the numbers
Difficulty: easy 
3

3. 
Find the value of the expression
Difficulty: medium 
4

4. 
Sum of the natural numbers
Difficulty: medium 
4

5. 
Find the sum of the square of natural numbers
Difficulty: medium 
4

6. 
Find the value of 'n'
Difficulty: medium 
4

7. 
Sum of cube of natural numbers up to 'k' terms
Difficulty: medium 
4

8. 
Find the average of the first 'n' natural numbers
Difficulty: medium 
4

9. 
Calculate the number of terms needed to get the sum
Difficulty: hard 
5

10. 
Find the amount of savings
Difficulty: hard 
5

11. 
Determine the value of 'n'
Difficulty: hard 
5

12. 
Find the area can be decorated
Difficulty: hard 
5

Tests
1. 
Training test I
Difficulty: medium 
11

2. 
Training test II
Difficulty: medium 
11
