It is: 126
The LCM of the given three numbers using prime factorization is 25200
the LCM of 42 and 126 using a prime factorization is 2 times 2 times 3
That depends on the value of A.
It is: 60
144
It is 500
644
It is: 144
The LCM of the given two numbers is 48
3 and 17 are both prime. Any time you have prime numbers, you multiply them together to get the LCM.
it is fast and easy
It is: 32*25 = 288