Question

find the HCF of the following numbers by by factor method.
(a)7,18
(b)12,30,54
(c)70,14,35​

Answer 1

a)1

b)6

c)7

a)

7=1×7

18=1×18

ans=1

b)

12=3×2×2

30=3×5×2

54=3×3×3×2

HCF=3×2=6

c)

70=7×2×5

14=7×2

35=7×5

HCF=7