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Vehicle registration plates are the mandatory number plates used to display the registration mark of a vehicle, and have existed in the United Kingdom since 1904. It is compulsory for most motor vehicles used on public roads to display them.
There can be many factors of a number. Example: All the factors of 12 2 × 6 = 12, but also 3 × 4 = 12, and of course 1 × 12 = 12.