Question

Find the HCF of 12, 24, 36

Answer 1

first take out the prime factors of 12 , 24 , and 36
12= 3*2*2
24=3*2*2*2
36= 3*2*2*3

separate the common terms:- 

3*2*2 = 12

therefore HCF of 12,24,36 is 12

Answer 2

Factors of 12= 1, 2, 3, 4, 6, 12;

Factors of 24= 1, 2, 3, 4, 6, 8, 12, 24;

Factors of 36= 1, 2, 3, 4, 6, 9, 12, 18, 36;

Common Factors= 1, 2, 3, 4, 6, 12;

Highest Common Factor (HCF)= 12