How many uniquely-numberd uniforms possible?

[beki440]

In basketball to avoid confusion when referees siganl fouls, the digits 6,7,8,and 9 are not used on players shirts. How many uniquely numbered red game uniforms are possible?

 

[Denis]

So 123450 is allowed as a number on one sweater? or 2222222222222222222222222222........ ? THINK!!

 

[masters]

I would think basketball jerseys would have either a single digit or a double digit number. Using 1, 2, 3, 4, 5, 0 would yield 6 unique combinations. Using these 6 digits again taken 2 at a time would yield 6^2 or 36 more, making a total of 42 combinations.