By simply re-ordering the digits, you can get 500 6-digit numbers, excluding those starting with 0.
There are thousands more that can be made using mathematical operations such as addition, subtraction, multiplication, division, exponentiation, factorials and so on.
64
8 of them.
1000
ccsndf
9
-5674
4*4*4 = 64 of them.
If the only operation is addition, then 3.
Their is 25 combinations
120
600 of them.600 of them.600 of them.600 of them.
You can make 4*3*2/2 = 12 numbers.