Theory
Exercises
1. 
Choose the correct answers
Difficulty: easy 
3

2. 
Factor tree
Difficulty: easy 
3

3. 
Select the correct number
Difficulty: easy 
3

4. 
Prime factorization of numbers
Difficulty: medium 
4

5. 
Find the HCF and LCM of three numbers
Difficulty: medium 
4

6. 
Calculate the time
Difficulty: medium 
4

7. 
Determine the value of the variables
Difficulty: medium 
2

8. 
Evaluate the value of the variable
Difficulty: medium 
4

9. 
HCF and LCM of algebraic expressions
Difficulty: medium 
4

10. 
Find the maximum length of the square tile
Difficulty: hard 
5

11. 
Choose the given numbers are coprime or not
Difficulty: hard 
8

12. 
Find the HCF of the given numbers
Difficulty: hard 
6

13. 
Case study based question: Prime factors and HCF
Difficulty: hard 
5

Tests
1. 
Training test I
Difficulty: medium 
9

2. 
Training test II
Difficulty: medium 
11
