Answer: Never true. 24 times 12 is 288, however the LCM for them is 3. 8 times 20 is 160, however the LCM for them is 2.
Explanation:
If you look at it by the fact that every number has a LCM of 1, and every even number has an LCM of 2, it is easy to take that and apply it to this question. Just factor in the numbers.