Find the Highest Common Factor (HCF) of 372, 732 and 2196.

Find the Highest Common Factor (HCF) of 372, 732 and 2196

372
372 = 2 × 2 × 3 × 31
= 2² × 3 × 31

732
732 = 2 × 2 × 3 × 61
= 2² × 3 × 61

2196
2196 = 2 × 2 × 3 × 3 × 61
= 2² × 3² × 61

Common in all three numbers:
2² and 3

HCF = 2² × 3
= 4 × 3
= 12