The LCM is 630.
630
It is not possible to give a sensible answer to this question. The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question!
The LCM of 54, 70, and 90 is 1890
2520
The LCM is 90.
The LCM of these numbers is 90.
The LCM of 1435 and 70 is 2870. The LCM of 14, 35 and 70 is 70.
The LCM is 70.
LCM = 90
The LCM is 70.
The LCM of 10 and 70 is 70.