Question

what is lcm and hcf of 45,75,30 respectively​

Answer 1

Answer:

LCM=450

HCF=15

Step-by-step explanation:

Answer 2

Answer:

LCM or HCF of three numbers is nothing but LCM or HCF of one of those numbers and LCM or HCF of the remaining two numbers.

Prime factorisation:

45 = 3 x 3 x 5

75 = 3 x 5 x 5

30 = 2 x 3 x 5

HCF of 45 and 75 = 3 x 5 = 15

Product of numbers = Product of HCF and LCM

So, LCM x 15 = 45 x 75

LCM = 225

HCF of 3 x 5 and 2 x 3 x 5 = 3 x 5 = 15

LCM of 3 x 3 x 5 x 5 and 2 x 3 x 5 = 2 x 3 x 3 x 5 x 5 = 450

HCF and LCM of 45, 75 and 30 are 15 and 450 respectively.