Question

Find the HCF of 120 and 210.

Answer 1

30

Explanation:

120 = 2³ × 3 × 5

210 = 2 × 3 × 5 × 7

HCF(120 ; 210) = 2 × 3 × 5 = 30

Answer 2

30

Explanation:

210=120x1+90

120=90x1+30

90=30x3+0