Answers

2014-05-12T16:44:58+05:30
My attempt to solve this problem is: First digit cannot be zero, so the number of choices only 6(1,2,3,4,5,6) The last digit can be pick from 0,2,4,6, so the number of choices only 4 Second digit can be only pick from the rest, so the number of choices only 5 Third digit can be only pick from the rest, so the number of choices only 4 The total number of choices is 6⋅4⋅5⋅4=480 So, is my solution true? Or I miss something? Thanks
0