Question

find the LCM of 20, 25 ,30, 45 by prime factorization method​

Answer 1

Answer:

300

Step-by-step explanation:

Step3:Multiply the divisors to find the lcm of 20, 25 and 30

5 x 2 x 5 x 3 x 2 = 300

LCM(20, 25, 30) = 300

The least common multiple for three numbers 20, 25 and 30 is 300.

Answer 2

900 Answer

20=2× 2×5 = 2² 5

25= 5×5 =5²

30= 5×3×2= 5×3×2

45= 5×3×3= 5×3²

the product of all the factors with highest powers : 2² × 3² ×5²

= 2×2×3×3×5×5 = 900 answer