The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
-4790281
Assuming each digit only once: 65432 (and no further mathematical operations).
It is: 63,477
9,000,833 using commas for thousand separators.
8,754,321
8643
531
The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
9531
-4790281
3201
9876543210
9+3-1
972.
Using those three digits it is 145.
Assuming each digit only once: 65432 (and no further mathematical operations).