Question 43528
Depends, can you repeat digits?
If you can ....
5 - 3 - 7
Three numbers:
3 * 3 * 3 = 27 different possibilites
3 * 3 * 3 * 9 * 9 * 9 * 9 = 177,147
If you can not ....
3 * 2 * 1 = 6 different possibilites
3 * 2 * 1 * 7 * 6 * 5 * 4 = 5,040