9. Find the smallest 4-digit number which is divisible by 18, 24 and 32.
LCM of 18, 24 and 32
LCM = 2 2 2 2 2 3 3
We have to find the smallest 4-digit multiple of 288.
It can be observed that 288 3 = 864 and 288 4 = 1152.
Therefore, the smallest 4-digit number which is divisible by 18, 24, and 32 is 1152.