Question

3. Find the LCM of the following numbers
by common division method.
a) 27.90
b) 30, 45
c) 144, 36
d) 36, 42, 28
e) 50, 25, 75 f) 24, 36, 72​

Answer 1

Answer:

a) factors 27 = 3*3*3

      factors of 90= 3*3*5*2

hence LCM= 3*3*3*5*2= 270

b) 30= 3*5*2

 45= 3*3*5

hence LCM= 3*3*5*2

c)   144= 3*3*2*2*2*2

     36 = 3*3*2*2

hence LCM= 3*3*2*2*2*2=144

d) 36= 3*3*2*2

    42=3*3*7

   28 = 7*2*2

hence LCM= 7*2*2*3*3 =252

e) 50 = 5*5*2

   25 = 5*5

  75= 5*5*3

hence LCM= 5*5*2*3 =150

f) 36 =3*3*2*2

  72= 3*3*2*2*2

hence LCM= 3*3*2*2*2= 72

 

Step-by-step explanation: