Question

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

Answer 1

( a ) 7 = 7 × 1

18 = 2 × 3 × 3 × 1

HCF ( 7 , 18 ) is 1

( b ) 12 = 2 × 2 × 3 × 1

30 = 2 × 3 × 5 × 1

54 = 2 × 3 × 3 × 3 × 1

HCF ( 12 , 30 , 54 ) is 6

( c ) 70 = 2 × 5 × 7 × 1

14 = 2 × 7 × 1

35 = 5 × 7 × 1

HCF ( 70 , 14 , 35 ) is 7