4. Determine the smallest 3-digit number which is exactly divisible by 6, 8 and 12.
Smallest number = LCM of 6, 8, 12
We have to find the smallest 3-digit multiple of 24.
It can be seen that
24 4 = 96 and
24 5 = 120.
Hence, the smallest 3-digit number which is exactly divisible by 6, 8, and 12 is 120.