1296
1) Let's find out the LCM (48,162, 3)
Let's factorize it by prime numbers, dividing it by a prime number:
2) When doing it we need to divide by the prime numbers, successively. The ones not divisible by 2 (like 81) we keep it.
So now, we can write that counting how many times each prime number on the right gets repeated:
3) Hence, the LCM of 48, 162, and 3 is 1296