If `(10^2017+5)^2=225lambda` and the sum of digits in `lambda` is N then the number of even digits in N is

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

In a two-digit number, the sum of the digit is 5 more than the units digit. The difference between the original number and the sum of digits is 10 more than the number formed by reversing the digits. Then find the difference between the digits.

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

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

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

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