Question

Find the HCF of the following numbers:

18, 54, 81

Answer 1

2	18
3	9
3	3
	1

 

2	54
3	27
3	9
3	3
	1

 

3	81
3	27
3	9
3	3
	1

18 = 2 × 3 × 3

54 = 2 × 3 × 3 × 3

81 = 3 × 3 × 3 × 3

HCF = 3 × 3 = 9