[Mr V]

Another reason that numbers aren't given out is because it is easier to remember for example that 4450 was the lowest team number for the 2013 season than to remember that it was for example 4407. So the each year numbers start at xx00 or xx50. Not really important to individual teams but easier at the administration level. The reserved numbers are also used for those split or combine cases because FIRST wants to be able to easily tell the relative team age using that 00/50 system noted above.