A is the smallest four digit number, which is divisible by three. B is the biggest number which rounded to the nearest hundred gives 9000 as the answer. Find the difference between a and B.

A: The smallest four-digit number that is divisible by 3 is 1002.

B: The biggest number that rounded to the nearest hundred gives 9000 as the answer is 8950.

Difference between A and B: 8950 - 1002 = 7948.

So, the difference between A and B is 7948.