Question 272080
FIRST DIGIT 3 (0,2,4):
ALL OTHER DIGITS 6
THUS WE HAVE 3*6*6*6=648 WITH REPEATS.
WITH NO REPEATS WE HAVE :
FIRST DIGIT 3:
THE REST 5,4,3
THUS WE HAVE 3*5*4*3=180 WITHOUT REPEATS.