Question

What is the LCM of 12,30 and 42

Answer 1

Answer:

420

Step-by-step explanation:

We can find the prime factors of each of the numbers first before finding their LCM.

12: 2 × 2 × 3

30: 2 × 3 × 5

42: 2 × 3 × 7

To find the LCM, we need to see if they are any common prime factors between all three numbers. The common prime factors are 2 and 3. Then, we multiply 2 and 3 with the remaining outstanding factors, which are 2, 5, and 7.

LCM: 2 × 2 × 3 × 5 × 7 = 420

Answer 2

the answer is 420.
factors of 12: 12,2,3
factors of 30: 2,3,5
factors of 42: 2,3,7
lcm = 2 squared x 3 x 5 x 7 (cause 2 occurs in the factors of 12,30,42)
ur answer is 420 :)