Question

2 is a hcf of
a)64,18
b)72,144
c)10,12
d)36,84

Answer 1

c) 10 , 12 is hcf of 2

Answer 2

To find the HCF, factorize all the numbers as given below

64 - 2 x 2 x 2 x 2 x 2 x 2
18 - 2 x 3 x 3
HCF is 2

72 - 2 x 2 x 2 x 3 x 3
144 - 2 x 2 x 2 x 2 x 3 x 3
HCF = 2 x 2 x 2 x 3 x 3 = 72

10 - 2 x 5
12 - 2 x 2 x 3
HCF is 2

36 - 2 x 2 x 3 x 3
84 - 2 x 2 x 3 x 7
HCF = 2 x 2 x 3 = 12

Hence, 2 is the HCF of 64, 18 and 10, 12