162, 324, 486, 648, 810, 972, 1134, 1296, 1458, 1620, . . .
Because they are multiples of 5. All multiples of 5 have 5 as a factor, which means they are divisible by 5.
64.8
Multiples of 5 and 10 are called common multiples.
There are an infinite number of multiples of 5
108, 216, 324, 432, 540
324, 648, 972 and so on.324, 648, 972 . . .
All multiples of 324 (which are infinite) including 324, 648, 972, 1296, 1620 . . .
81, 162, 243, 324, etc.
18 and 18
324, 648, 972 and so on.
81, 162, 243, 324
List the multiples of 324 and whatever the other number is. The first number that appears on both lists is the LCM.
162, 324, 486, 648, 810, 972, 1134, . . .
108, 216, 324, 432, 540
162 243 324 405 486
The common multiples of 27 and 36 are 108, 216, 324 and so on.