3 to the fifth power, ie 243
There are 34 = 81 numbers.
6!
5040 different 4 digit numbers can be formed with the digits 123456789. This is assuming that no digits are repeated with each combination.
16000
3
256 numbers.
There are 3 values (1, 2, 3) for each of the 4 digits. Therefore, there are 3*3*3*3 or 81 four digit numbers that can be formed.
24 different numbers.
27
pizza
4*3*2*1 = 24
1 set