Answer :
a) 004 044 000
040 404 444 8 numbers
400 440
b) None
c) None, because we only have 2 digits, I need to repeat at least 1 number.
a) 004 044 000
040 404 444 8 numbers
400 440
b) None
c) None, because we only have 2 digits, I need to repeat at least 1 number.