Question

1.
Find the HCF of the following numbers by factor method.
Di
(a) 7, 18
(b) 12, 30, 54
(c) 70, 14, 35​

Answer 1

a) 7=7×1

18=2×3×3×1

HCF=1

b)12=2×2×3

30=2×3×5

54=2×3×3×3

hcf=2×3

=6

c)70=2×5×7

14=2×7

35=5×7

hcf=7