-9
36 - 18
(5+7)*(5-3)=12*2=24
Yes you can do that
You have 4 options for the first digit, 3 for the second, 2 for the third. Multiplying all this you get 4 x 3 x 2 = 24 options.
3! = 6.
4*3*2 = 24 of them.
8
only using the numbers once
None.
If you want 4-digit numbers, there are 24 of them.
998,000
2,5,13,647,809
(7 + 5 - 9) x 8 = 24
(6 x 13) - (6 x 9) = 78 - 54 = 24
There is only one combination. In a combination the order of the numbers does not matter so the only combination is 0123456789. This is the same as 1326458097
-9