Theory
Textbook Questions
1. 
Solve the congruence modulo
Difficulty: easy 
1

2. 
Find the value of x
Difficulty: easy 
1

3. 
What is the time?
Difficulty: medium 
2

4. 
Which number modulo 17
Difficulty: medium 
2

5. 
Prove the given statement
Difficulty: medium 
4

6. 
Obtain the remainder
Difficulty: medium 
2

Practice Questions
1. 
Find the missing number
Difficulty: easy 
2

2. 
Choose the possible values of x
Difficulty: easy 
2

3. 
Select the best choice
Difficulty: easy 
2

4. 
Subtraction and multiplication in modular arithmetic
Difficulty: medium 
4

5. 
Find the remainder
Difficulty: medium 
4

6. 
Calculate the smallest positive value
Difficulty: medium 
4

7. 
Who is correct?
Difficulty: hard 
5

8. 
Determine the time
Difficulty: hard 
5

Key Questions for School Exam Preparation
1. 
Find the day when Vani celebrated her birthday
Difficulty: hard 
5

2. 
Find the arrival time of the train
Difficulty: hard 
5

3. 
Find the landing time of the flight
Difficulty: hard 
5

Worksheets
1. 
Worksheet I
Difficulty: medium 
10

2. 
Worksheet II
Difficulty: medium 
14
