I really don't know. I tried and tried, but the closest thing I got was 21. Sorry
It's done by: (7+4+1) times 2 = 24
8+8+3+3+2x1=24
9 +16 -1 = 24
24 different numbers.
4 x (1+5) = 24
It's done by: (7+4+1) times 2 = 24
7 + 9 + 8*1
8+8+3+3+2x1=24
The only way I know how to do it is 12+13=25, 6 divided by 6=1, and 25-1=24
9 +16 -1 = 24
24 different numbers.
4*3*2*1 = 24
If you want 4-digit numbers, there are 24 of them.
4 x (1+5) = 24
5x5=25 25-1=24
6*5*1-6
24 = 4*3*2*1 of them