Theory
Exercises
1. 
Sum of the series
Difficulty: easy 
2

2. 
Calculate sum of the series
Difficulty: easy 
2

3. 
A.P. series: Determine the value of the prize
Difficulty: easy 
3

4. 
A.P. series: Find when the sum will be zero
Difficulty: easy 
2

5. 
Book exercise I
Difficulty: medium 
4

6. 
Calculate sum of the positive integer
Difficulty: medium 
4

7. 
Find sum of the series
Difficulty: medium 
3

8. 
Find the next terms of the sequences
Difficulty: medium 
4

9. 
Police and theif
Difficulty: hard 
5

10. 
Obtain the required term
Difficulty: hard 
3

Tests
1. 
Training test
Difficulty: medium 
11
