Question

Find the lcm and hcf of 84,90and 81

Answer 1

Answer:

LCM = 68040

HCF = 3

Step-by-step explanation:

84 = 2 x 2 x 3 x 7

90 = 2 x 3 x 3 x 5

81 = 3 x 3 x 3 x 3

LCM = 3 x 2 x 2 x 7 x 2 x 3 x 5 x 3 x 3 x 3 =  68,040

HCF =  3 (3 is common in all)