24
16
4: 1999,9199,9919,9991
Six.
8 of them.
55----------------------------------------------------------------------------------------------From Rafaelrz.You can make, 5! = 120, five digit numbers using 1,2,3,4 and 6.
ccsndf
9
-5674
-1230
3024
4*4*4 = 64 of them.
10999