In order 2008∗ to be divisible with 6 it has to be divisible with 2 and 3. In order to be divisible with 2 it has to end on 0, 2, 4, 6 or 8. From the numbers 20080, 20082, 20084, 20086 and 20088 only 20082 and 20088 are divisible with 3. So on the place of the ∗ we can put 2 or 8.
Source: MathNet,
licensed CC-BY-4.0.
Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project.