The total number of seven digit numbers so that the sum of digits is even

The total number of 8 digit numbers is

The number of 5digit number such that sum of digits is even

The total number of 6-digit numbers in which the sum of the digits is divisible by 5, is

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 __________.

Let ' m ' denotes the number of four digit numbers such that the left most digit is odd, the second digit is even and all four digits are different and ' n ' denotes the number of four digit numbers such that left most digit is even, second digit is odd and all four digit are different. If m=nk, then k equals :

How many different seven digit numbers are there the sum of whose digits is even ?