The total number of 9 digit numbers of different digits is:

The total number of 8 digit numbers is

The total number of two digit numbers whose unit digit is either, same, double, triple or quadruple of the tens digit :

The total number of 3-digit numbers, whose sum of digits is 10, is __________.

The total number of 3-digit numbers, whose sum of digits is 10, is

The total number of 9-digit number which have all different digits is

The total number of 4 digit numbers in which the digit are in descending order, is

Find the total number of 9-digit numbers which have all different digits.