Paul Scholes
the code is 9999
Nope
9999
Yes you can, if you include the extra 4 that can be gotten after 9999, 10003 maximum.
9999+8888+7777
9999
Exactly as in the question 9999
848-9999= -9151
Any multiple of 9999
9999
The difference between 9999 and 999.9 is: 9999 - 999.9 = 8999.1