Answer:
0 or -3375
Explanation:
The question is somewhat ambiguous because we can't be sure whether B will be positive integers which are multiples of both 3 and 2 or 3 and 2 separately.
For the former:
There a 4 multiples of 6 less than 30: 6, 12, 18, 24.
Positive integers (whole numbers) less than 30: 1-29 ; multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27 and of those, only 6, 12, 18 and 24 are multiples of both 2 and 3.
Therefore we have (4-4)^3 = 0
For the latter:
multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27 ; Multiples of 2: 2 4 6 8 10 12 14 16 18 20 22 24 26 28 (remove common multiples)
Therefore (4-19)^3 = -3375
